| Acer capillipes | Bright indirect light (just back from a sunny window) | Water deeply weekly while establishing; supplement in summer droughts | Pet-safe |
| Acer griseum | Direct sun (at least 4-6 hours) | Water deeply weekly while establishing; supplement in summer droughts | Pet-safe |
| Acer japonicum 'Aconitifolium' | Bright indirect light (just back from a sunny window) | Keep soil evenly moist; water deeply in dry spells | Pet-safe |
| Acer palmatum 'Atropurpureum' | Bright indirect light (just back from a sunny window) | Keep evenly moist; water deeply through dry weather | Pet-safe |
| Acer palmatum 'Butterfly' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry; keep evenly moist, more often in pots and heat | Pet-safe |
| Acer palmatum 'Dissectum' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry; keep evenly moist, more often in pots and heat | Pet-safe |
| Acer palmatum 'Garnet' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry; keep evenly moist, more often in pots and heat | Pet-safe |
| Acer palmatum 'Orangeola' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry; keep evenly moist, more often in containers and heat | Pet-safe |
| Acer rubrum 'Autumn Blaze' | Direct sun (at least 4-6 hours) | Weekly while establishing; deep watering in droughts thereafter | Pet-safe |
| Acer rubrum 'October Glory' | Direct sun (at least 4-6 hours) | Weekly while establishing; deep watering in dry spells thereafter | Pet-safe |
| Achimenes 'Cascade Violet Night' | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth, roughly every 4-6 days | Pet-safe |
| Achimenes 'Peach Blossom' | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth, roughly every 4-6 days | Pet-safe |
| Achimenes 'Tarantella' | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth, roughly every 4-6 days | Pet-safe |
| Achimenes erecta | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth, roughly every 4-6 days | Pet-safe |
| Achimenes grandiflora | Bright indirect light (just back from a sunny window) | Keep evenly moist while in growth, roughly every 4-6 days | Pet-safe |
| Adagio Maiden Grass | Direct sun (at least 4-6 hours) | Weekly for the first season; every 2–3 weeks once established | Pet-safe |
| Adolphe Audusson Camellia | Bright indirect light (just back from a sunny window) | Every 5-7 days in the growing season; keep consistently moist but not waterlogged | Pet-safe |
| Adriatic Bellflower | Bright indirect light (just back from a sunny window) | Weekly during spring and summer; minimal in winter | Pet-safe |
| Aechmea 'Blue Rain' | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; flush weekly and keep the mix nearly dry | Pet-safe |
| Aechmea 'Foster's Favorite' | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; flush and refill weekly | Pet-safe |
| Aechmea blanchetiana | Direct sun (at least 4-6 hours) | Keep the central cup filled; refresh weekly and water mix when top few cm are dry | Pet-safe |
| Aechmea chantinii | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush weekly and keep the mix nearly dry | Pet-safe |
| Aechmea cylindrata | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; flush and refill every 1-2 weeks | Pet-safe |
| Aechmea gamosepala | Bright indirect light (just back from a sunny window) | Keep the central cup filled; refresh weekly and water mix when top 2-3 cm dry | Pet-safe |
| Aechmea nudicaulis | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Aechmea orlandiana | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush weekly | Pet-safe |
| Aechmea recurvata | Bright indirect light (just back from a sunny window) | Keep the small cup filled; refresh weekly and water mix when top few cm dry | Pet-safe |
| Aerangis biloba | Bright indirect light (just back from a sunny window) | Every 1-3 days when mounted; every 3-5 days in a small basket, kept lightly moist | Pet-safe |
| Aerangis luteoalba | Bright indirect light (just back from a sunny window) | Every 1-3 days when mounted; every 3-5 days in a small basket, keeping it lightly moist | Pet-safe |
| Aerangis rhodosticta | Bright indirect light (just back from a sunny window) | Mounted plants every 1-2 days in summer, every 2-4 days in winter; potted plants when the surface bark just begins to dry | Pet-safe |
| Aeschynanthus 'Black Pagoda' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Aeschynanthus 'Mona Lisa' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Aeschynanthus 'Rasta' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Aeschynanthus lobbianus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Aeschynanthus marmoratus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Aeschynanthus pulcher | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Aeschynanthus radicans 'Curly Q' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Aeschynanthus speciosus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 4-8 days in growth | Pet-safe |
| Aeschynanthus tricolor | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days | Pet-safe |
| African Baobab | Direct sun (at least 4-6 hours) | Every 1–2 weeks in summer; once a month or less in winter | Pet-safe |
| African Crossandra | Bright indirect light (just back from a sunny window) | Every 5–7 days in the growing season, reducing to every 10–14 days in winter | Pet-safe |
| African feather grass | Direct sun (at least 4-6 hours) | Every 1–2 weeks once established; more frequently when newly planted | Pet-safe |
| African Oil Palm | Direct sun (at least 4-6 hours) | When the top 4-6 cm of soil is dry, roughly every 7-10 days in summer; every 14-21 days in winter | Pet-safe |
| African Tamarisk | Direct sun (at least 4-6 hours) | Low once established; moderate during establishment | Pet-safe |
| African Violet 'Blue Nile' | Bright indirect light (just back from a sunny window) | When the top of the soil feels barely dry, roughly every 5-7 days | Pet-safe |
| African Violet 'Optimara EverFloris' | Bright indirect light (just back from a sunny window) | When the top of the soil feels just dry, about every 5-7 days | Pet-safe |
| African Violet 'Optimara Little Maya' | Bright indirect light (just back from a sunny window) | When the top of the soil feels barely dry, roughly every 5-7 days | Pet-safe |
| African Violet 'Optimara' | Bright indirect light (just back from a sunny window) | When the top of the soil feels barely dry, roughly every 5-7 days | Pet-safe |
| African Violet 'Rob's Boolaroo' | Bright indirect light (just back from a sunny window) | When the top of the soil feels barely dry, roughly every 5-7 days | Pet-safe |
| African violet streptocarpus | Bright indirect light (just back from a sunny window) | Every 7–10 days, allowing the top inch of soil to dry between waterings | Pet-safe |
| Afro Hard Rush | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water 1–2 times per week in warm weather | Pet-safe |
| Agastache 'Blue Fortune' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Agave Cactus | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, roughly every 10-14 days in summer; very sparingly in winter | Pet-safe |
| Agave-Leaved Sea Holly | Direct sun (at least 4-6 hours) | Low — occasional deep watering during the first season, minimal thereafter | Pet-safe |
| Agnes Rose | Direct sun (at least 4-6 hours) | Deep watering once a week, more in drought or first season | Pet-safe |
| Air plant | Bright indirect light (just back from a sunny window) | Soak weekly for 20-30 minutes | Pet-safe |
| Aizoon Rosularia | Bright indirect light (just back from a sunny window) | Every 3–4 weeks in spring and summer; rarely in winter | Pet-safe |
| Albert's Gold tree heath | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks in summer once established | Pet-safe |
| Alcantarea imperialis | Bright indirect light (just back from a sunny window) | Keep the central tank filled; water the mix when its top 4-5 cm is dry | Pet-safe |
| Alcantarea odorata | Bright indirect light (just back from a sunny window) | Keep the central tank filled; water the mix when its top 4-5 cm is dry | Pet-safe |
| Algerian Fir | Direct sun (at least 4-6 hours) | Low to moderate; highly drought-tolerant once established | Pet-safe |
| Alma Potschke aster | Direct sun (at least 4-6 hours) | Weekly during the growing season; reduce after flowering | Pet-safe |
| Almost-round Cape Primrose | Bright indirect light (just back from a sunny window) | Every 7–14 days in the growing season; sparingly in winter | Pet-safe |
| Alonso's Turbinicarpus | Direct sun (at least 4-6 hours) | When the soil is bone dry, roughly every 14-21 days in the growing season; withhold almost entirely in winter | Pet-safe |
| Alphonse Karr Bamboo | Direct sun (at least 4-6 hours) | Regularly during summer, approximately every 5–7 days; reduce in cooler months as growth slows | Pet-safe |
| Alpine bearberry | Direct sun (at least 4-6 hours) | Moderate; keep soil moist but well-drained; water regularly during dry periods | Pet-safe |
| Alpine Cinquefoil | Direct sun (at least 4-6 hours) | Every 10–14 days; very drought-tolerant once established | Pet-safe |
| Alpine Mouse-ear | Direct sun (at least 4-6 hours) | Sparingly — allow soil to dry between waterings; minimal winter moisture | Pet-safe |
| Alpine Rock Cress | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks once established | Pet-safe |
| Alpine Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks when in growth (spring–summer); very sparingly in winter | Pet-safe |
| Alsobia 'San Miguel' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Alsobia dianthiflora | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Altissimo Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the first season; established plants when the top 5 cm of soil is dry | Pet-safe |
| Aluminum Plant (Watermelon Pilea) | Bright indirect light (just back from a sunny window) | When the top quarter-inch of soil dries out (roughly weekly in summer) | Pet-safe |
| Amazon Moonflower Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of substrate is dry, roughly every 7-10 days in the growing season; every 2-3 weeks in a cooler rest period | Pet-safe |
| Ambarella | Direct sun (at least 4-6 hours) | Every 7–10 days; drought-tolerant when established | Pet-safe |
| America Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly while establishing; mature plants when the top few centimetres of soil dry out | Pet-safe |
| American Basswood | Bright indirect light (just back from a sunny window) | Weekly during establishment; less once mature | Pet-safe |
| American Beachgrass | Direct sun (at least 4-6 hours) | Low; drought-tolerant once established | Pet-safe |
| American Dunegrass | Direct sun (at least 4-6 hours) | Low; drought-tolerant | Pet-safe |
| American White Water Lily | Direct sun (at least 4-6 hours) | Permanently aquatic — crown submerged 15–60 cm (6–24 in) below water surface | Pet-safe |
| Ananas bracteatus | Direct sun (at least 4-6 hours) | When the top few centimetres of soil dry, about every 7-10 days in growth, less in winter | Pet-safe |
| Ananas bracteatus 'Tricolor' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-10 days in growth | Pet-safe |
| Ananas comosus 'Variegatus' | Direct sun (at least 4-6 hours) | When the top few centimetres of soil dry, about every 7-10 days in growth, less in winter | Pet-safe |
| Ananas lucidus | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-10 days in growth | Pet-safe |
| Andinum Staghorn Fern | Bright indirect light (just back from a sunny window) | Soak when the mount is light and nearly dry, roughly every 5-10 days | Pet-safe |
| Andre's Pitcairnia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Angel Face Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly | Pet-safe |
| Angelina Stonecrop | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 10-14 days in summer; little to none in winter | Pet-safe |
| Angraecum distichum | Bright indirect light (just back from a sunny window) | Keep evenly moist; water roughly every 2-4 days when mounted, or when the bark surface just begins to dry | Pet-safe |
| Anise-scented Sage | Bright indirect light (just back from a sunny window) | Regular throughout the growing season | Pet-safe |
| Annual Phlox | Direct sun (at least 4-6 hours) | Every 5–7 days; keep soil evenly moist but not saturated | Pet-safe |
| Annual Phlox 'Sugar Stars' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, about every 4-7 days | Pet-safe |
| Annual Rainbow Plant | Direct sun (at least 4-6 hours) | Keep medium wet at all times; tray method, water never allowed to dry out | Pet-safe |
| Antirrhinum majus 'Chantilly Bronze' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Antirrhinum majus 'Rocket Red' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Antirrhinum majus 'Sonnet Pink' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Antirrhinum majus 'Twinny Peach' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Aphelandra tetragona | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Appalachian Blazing Star | Direct sun (at least 4-6 hours) | Every 2 weeks during establishment; essentially rain-fed once mature | Pet-safe |
| Apricot Bouquet gloxinia | Bright indirect light (just back from a sunny window) | Every 5–10 days; keep evenly moist during active growth | Pet-safe |
| Apricot Gongora | Bright indirect light (just back from a sunny window) | Consistently moist year-round; slight reduction in winter | Pet-safe |
| Apricot Sprite Hyssop | Direct sun (at least 4-6 hours) | Every 7–10 days once established; more frequent in containers | Pet-safe |
| Aptos Blue Redwood | Direct sun (at least 4-6 hours) | Weekly when young; every 1–2 weeks when established | Pet-safe |
| Arabian Jasmine | Direct sun (at least 4-6 hours) | Keep evenly moist in growth; water when the top 2-3 cm of soil dries, often every 3-5 days in warmth | Pet-safe |
| Arching Spider Orchid | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of the bark mix is dry, roughly every 7-10 days in summer | Pet-safe |
| Areca palm | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, every 5-7 days | Pet-safe |
| Argentine Giant Cactus | Direct sun (at least 4-6 hours) | When the soil is dry, about every 1-2 weeks in summer; keep dry in winter | Pet-safe |
| Arikury Palm | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-14 days | Pet-safe |
| Armenian Speedwell | Direct sun (at least 4-6 hours) | Every 10–14 days during the growing season; little to none in winter. | Pet-safe |
| Armored Frailea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 10-14 days in summer | Pet-safe |
| Aromatic Aster | Direct sun (at least 4-6 hours) | Water to establish, then rarely; very drought-tolerant | Pet-safe |
| Arrowwood Viburnum | Direct sun (at least 4-6 hours) | Weekly when young; established plants tolerate both moist and occasionally dry soil | Pet-safe |
| Artillery Plant | Bright indirect light (just back from a sunny window) | When the top 1-2 cm (about half an inch) of soil is dry | Pet-safe |
| Ashy Sunflower | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; very drought-tolerant | Pet-safe |
| Asphodel Cranesbill | Bright indirect light (just back from a sunny window) | Weekly during the growing season; reduce in autumn | Pet-safe |
| Assai Palm | Direct sun (at least 4-6 hours) | Keep consistently moist; water every 3-5 days in warm weather | Pet-safe |
| Assam Fan Palm | Direct sun (at least 4-6 hours) | Weekly in growing season, every 2–3 weeks in winter | Pet-safe |
| Aster 'October Skies' | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 10-14 days once established | Pet-safe |
| Aster 'Raydon's Favorite' | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 10-14 days once established | Pet-safe |
| Aster × frikartii 'Mönch' | Direct sun (at least 4-6 hours) | Water to establish, then moderately; water in prolonged dry spells | Pet-safe |
| Astrophytum coahuilense | Direct sun (at least 4-6 hours) | Soak-and-dry, roughly every 14 days in summer; keep dry in winter | Pet-safe |
| Aubert's Blyxa | Bright indirect light (just back from a sunny window) | Permanently submerged aquatic plant | Pet-safe |
| Audray White globe amaranth | Direct sun (at least 4-6 hours) | Every 5–7 days; drought-tolerant once established | Pet-safe |
| Australian Bangalow Palm | Direct sun (at least 4-6 hours) | Weekly during establishment; every 10–14 days once established in-ground | Pet-safe |
| Australian Cabbage Palm | Direct sun (at least 4-6 hours) | Water when the top 4-5 cm of soil dries out, roughly every 10-14 days in active growth | Pet-safe |
| Australian Fan Palm | Bright indirect light (just back from a sunny window) | Weekly in the growing season; every 10–14 days in winter | Pet-safe |
| Australian Fan Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Australian Tree Fern | Bright indirect light (just back from a sunny window) | 2-3 times per week; increase in heat and wind | Pet-safe |
| Autumn Brilliance serviceberry | Direct sun (at least 4-6 hours) | Weekly during establishment; moderate once established | Pet-safe |
| Autumn Catchfly | Direct sun (at least 4-6 hours) | Every 7–10 days in summer; reduce in winter | Pet-safe |
| Autumn heath | Direct sun (at least 4-6 hours) | Fortnightly during establishment; drought-tolerant once established | Pet-safe |
| Autumn Laelia | Bright indirect light (just back from a sunny window) | Every 5–7 days in spring and early summer; taper to every 2–3 weeks in late summer | Pet-safe |
| autumn red grass | Direct sun (at least 4-6 hours) | Every 7–14 days during the growing season; reduce in autumn and winter | Pet-safe |
| Autumn Sage | Direct sun (at least 4-6 hours) | Occasional once established; regular for first season | Pet-safe |
| Avalanche Feather Reed Grass | Direct sun (at least 4-6 hours) | When the top few centimetres of soil dry, around weekly; tolerant of occasional wet ground | Pet-safe |
| Avalanche Reed Grass | Bright indirect light (just back from a sunny window) | Every 7-14 days; keep moderately moist in the growing season | Pet-safe |
| Awl-Leaved Air Plant | Bright indirect light (just back from a sunny window) | Soak weekly; mist 2–3 times per week | Pet-safe |
| Azores Jasmine | Direct sun (at least 4-6 hours) | Every 5–7 days in summer; every 10–14 days in winter | Pet-safe |
| Aztec Cactus | Bright indirect light (just back from a sunny window) | When the potting mix is almost completely dry, roughly every 14-28 days in the growing season; very sparingly in winter | Pet-safe |
| Baby Love Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the growing season, more in heat or in pots | Pet-safe |
| Baby rubber plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 7-14 days in summer and every 2-3 weeks in winter | Pet-safe |
| Baby Sage | Direct sun (at least 4-6 hours) | Every 10–14 days once established | Pet-safe |
| Baby Tears (Pilea) | Bright indirect light (just back from a sunny window) | When the top inch of soil begins to dry, often every few days in summer | Pet-safe |
| Baby Toes | Direct sun (at least 4-6 hours) | Every 3–4 weeks in summer active season; very rarely in winter | Pet-safe |
| Baby's Tears | Bright indirect light (just back from a sunny window) | Every 2-4 days; keep soil consistently moist | Pet-safe |
| Bachelor's button | Direct sun (at least 4-6 hours) | Every 7–10 days | Pet-safe |
| Bacopa | Bright indirect light (just back from a sunny window) | Every 2–3 days in containers during warm weather; reduce in cooler conditions | Pet-safe |
| Bacopa 'Scopia Gulliver Purple' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost starts to dry, often daily in warm weather | Pet-safe |
| Bacopa 'Snowtopia' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost begins to dry, often daily in warm weather | Pet-safe |
| Bahia Earth Star | Bright indirect light (just back from a sunny window) | Water soil when top 2-3 cm is dry, roughly every 7-14 days | Pet-safe |
| Bahian Neoregelia | Direct sun (at least 4-6 hours) | Water sparingly; allow potting medium to dry between waterings and keep a small amount of water in the central cup | Pet-safe |
| Bailey Palm | Direct sun (at least 4-6 hours) | When the top 6-10 cm of soil is dry, roughly every 10-14 days in the growing season; every 4-6 weeks in winter | Pet-safe |
| Balbis Banana | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water every 3-5 days in summer | Pet-safe |
| Balkan Saxifrage | Direct sun (at least 4-6 hours) | Low — water at the base only; allow near-drying between waterings | Pet-safe |
| Ball Cactus | Direct sun (at least 4-6 hours) | When the top of the soil is dry, about every 7-10 days in summer; sparingly to none in winter | Pet-safe |
| Ballerina Rose | Direct sun (at least 4-6 hours) | Deep watering once or twice weekly | Pet-safe |
| Balsam Fir | Direct sun (at least 4-6 hours) | Weekly during establishment; naturally rainfall-sustained thereafter | Pet-safe |
| Bamboo Muhly | Direct sun (at least 4-6 hours) | Every 2–3 weeks in summer; monthly or less in winter once established | Pet-safe |
| Bamboo Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm (1 inch) of soil is dry, roughly every 7-10 days | Pet-safe |
| Banded Billbergia | Bright indirect light (just back from a sunny window) | Every 1–2 weeks (cup); soil when dry | Pet-safe |
| Banded Cape Primrose | Bright indirect light (just back from a sunny window) | Every 5-7 days in the growing season; reduce to every 10-14 days in winter | Pet-safe |
| Banded Haworthia | Bright indirect light (just back from a sunny window) | When soil is fully dry, about every 10-14 days in summer, sparse in winter | Pet-safe |
| Barbados Maidenhair Fern | Bright indirect light (just back from a sunny window) | Every 3–5 days; keep consistently moist | Pet-safe |
| Bare-stemmed Sinningia | Bright indirect light (just back from a sunny window) | Moderate in growing season; withhold in dry rest period | Pet-safe |
| Baron's Palm | Bright indirect light (just back from a sunny window) | Every 4–7 days; adjust based on temperature and container vs. in-ground | Pet-safe |
| Barrelier's Sage | Direct sun (at least 4-6 hours) | Weekly to establish, then fortnightly | Pet-safe |
| Bartram's Air Plant | Bright indirect light (just back from a sunny window) | Mist lightly 3–4 times a week or soak briefly once a week | Pet-safe |
| Basketgrass | Bright indirect light (just back from a sunny window) | Every 5–7 days in growing season; every 10–14 days in winter | Pet-safe |
| Bear Paw Fern | Bright indirect light (just back from a sunny window) | Allow the top 2-3 cm of substrate to dry before watering, roughly every 7-10 days | Pet-safe |
| Bear Tupelo | Bright indirect light (just back from a sunny window) | Regularly; keep consistently moist | Pet-safe |
| Bearded Huernia | Bright indirect light (just back from a sunny window) | Every 14–21 days when actively growing (spring–autumn); minimal in winter (once a month or less) | Pet-safe |
| Bearded Trichodiadema | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in the growing season (winter-spring); reduce in summer when the plant is semi-dormant | Pet-safe |
| Bearded-Stem Peperomia | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (allow compost to partially dry between waterings) | Pet-safe |
| Beaucarnea Gracilis | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in summer and monthly or less in winter | Pet-safe |
| Beaucarnea Stricta | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 2-3 weeks in summer and much less in winter | Pet-safe |
| beautiful feather grass | Direct sun (at least 4-6 hours) | Weekly in the first season; minimal once established | Pet-safe |
| Beautiful Fuchsia | Bright indirect light (just back from a sunny window) | Water freely in growth; reduce in winter | Pet-safe |
| Beautiful Gastrochilus | Bright indirect light (just back from a sunny window) | Daily misting of roots; soak mounted plants every 2-3 days during active growth; reduce to every 5-7 days in cooler months | Pet-safe |
| Beautiful Graptopetalum | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; monthly or less in winter | Pet-safe |
| Beautiful Living Stones | Direct sun (at least 4-6 hours) | Seasonally — water only during active growth (late summer through autumn and again briefly in spring); keep dry the rest of the year | Pet-safe |
| Beautiful Sundew | Bright indirect light (just back from a sunny window) | Tray method, keep medium consistently moist | Pet-safe |
| Beavertail Cactus | Direct sun (at least 4-6 hours) | Very sparingly when soil is bone dry, roughly every 3-4 weeks in summer; keep dry in winter | Pet-safe |
| Bee Balm 'Cambridge Scarlet' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days during the growing season | Pet-safe |
| Bee Orchid | Bright indirect light (just back from a sunny window) | Low; drought-tolerant once established | Pet-safe |
| Beetle Peperomia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, typically every 7-10 days | Pet-safe |
| Belize Sage | Bright indirect light (just back from a sunny window) | Twice weekly during active growth | Pet-safe |
| Bell heather | Direct sun (at least 4-6 hours) | Weekly when establishing; every 2–3 weeks once established | Pet-safe |
| Bellina Moth Orchid | Bright indirect light (just back from a sunny window) | Roughly every 5-7 days; when potting media is nearly dry but not bone dry | Pet-safe |
| Benary's Giant Coral zinnia | Direct sun (at least 4-6 hours) | Regular; water at soil level 2–3 times per week in dry weather | Pet-safe |
| Benary's Giant Coral Zinnia | Direct sun (at least 4-6 hours) | Water at the base every 5-7 days, allowing the top 3-5 cm of soil to dry between waterings; overhead watering should be avoided | Pet-safe |
| Bent Masdevallia | Bright indirect light (just back from a sunny window) | Every 2-3 days in warm weather, every 3-4 days in winter | Pet-safe |
| Beoley Gold heather | Direct sun (at least 4-6 hours) | Weekly during establishment; occasional watering once established in dry spells | Pet-safe |
| Bertero's Guzmania | Bright indirect light (just back from a sunny window) | Refill cup every 7 days; flush every 3–4 weeks | Pet-safe |
| Bertolonia maculata | Bright indirect light (just back from a sunny window) | Keep the mix evenly moist, watering when the top layer just starts to dry, roughly every 4-6 days | Pet-safe |
| Besom heath | Direct sun (at least 4-6 hours) | Weekly during establishment; largely self-sufficient once established | Pet-safe |
| Bicolor St Dabeoc's heath | Direct sun (at least 4-6 hours) | Moderate; water regularly to keep soil moist, particularly in dry spells | Pet-safe |
| Bidens ferulifolia 'Bidy Gonzales' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 2-4 days in containers during summer heat | Pet-safe |
| Bidens ferulifolia 'Campfire Fireburst' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, about every 2-4 days in summer containers | Pet-safe |
| Big Bluestem | Direct sun (at least 4-6 hours) | Every 2–3 weeks during establishment; rainfall-sufficient once established in most of its native range | Pet-safe |
| Big Kiss Yellow Flame Gazania | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-14 days | Pet-safe |
| Big Red Sage | Bright indirect light (just back from a sunny window) | Moderate; keep evenly moist, especially during establishment | Pet-safe |
| Big-Flowered Catmint | Direct sun (at least 4-6 hours) | Every 7–10 days; allow soil surface to dry between waterings | Pet-safe |
| Bigcone Douglas Fir | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established | Pet-safe |
| Bigleaf Magnolia | Bright indirect light (just back from a sunny window) | Deeply twice weekly during establishment; weekly once established in dry periods | Pet-safe |
| Billbergia 'Fantasia' | Bright indirect light (just back from a sunny window) | Keep the central vase topped up; flush and refill every 1-2 weeks, water the mix when it dries | Pet-safe |
| Billbergia amoena | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Billbergia pyramidalis | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; water the mix when its top 2-3 cm is dry, about weekly in growth | Pet-safe |
| Billbergia venezuelana | Bright indirect light (just back from a sunny window) | Keep the central tube topped up; water the mix when its top 2-3 cm is dry, about weekly in growth | Pet-safe |
| Billbergia zebrina | Bright indirect light (just back from a sunny window) | Keep the central tube topped up; water the mix when its top 2-3 cm is dry, about weekly in growth | Pet-safe |
| Birchleaf Spirea | Direct sun (at least 4-6 hours) | Weekly until established; occasional watering in drought once mature | Pet-safe |
| Bird's Nest Cactus | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, every 7-14 days in summer | Pet-safe |
| Bird's Nest Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 7-10 days | Pet-safe |
| Bird's Nest Spruce | Direct sun (at least 4-6 hours) | Every 7-10 days while establishing; deep watering when the top 5 cm of soil is dry | Pet-safe |
| Bird's Nest Spruce | Direct sun (at least 4-6 hours) | Moderate; water during dry spells in the first two years, then largely self-sufficient | Pet-safe |
| Biriba | Direct sun (at least 4-6 hours) | 2–3 times per week; do not allow soil to dry out | Pet-safe |
| Bishop's Cap Cactus | Bright indirect light (just back from a sunny window) | Every 1-2 weeks in spring/summer; roughly monthly or less in winter | Pet-safe |
| Bisset's Bamboo | Direct sun (at least 4-6 hours) | Weekly during the growing season; every 2–3 weeks when dormant | Pet-safe |
| Bitterroot | Direct sun (at least 4-6 hours) | Winter rains / early spring only; bone dry from June to October | Pet-safe |
| Bitterroot Lewisia | Bright indirect light (just back from a sunny window) | Weekly in spring; monthly or less in summer dormancy | Pet-safe |
| Black Ash | Direct sun (at least 4-6 hours) | High; requires consistently moist to wet soil | Pet-safe |
| Black Ball cornflower | Direct sun (at least 4-6 hours) | Every 7–10 days | Pet-safe |
| Black Bamboo | Direct sun (at least 4-6 hours) | Weekly when establishing; reduce once established | Pet-safe |
| Black Gold clog plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in spring–summer, every 12–14 days in autumn–winter | Pet-safe |
| Black Gold Goldfish Plant | Bright indirect light (just back from a sunny window) | Every 7–10 days; allow top 2–3 cm of soil to dry between waterings | Pet-safe |
| Black Knight scabiosa | Direct sun (at least 4-6 hours) | Once or twice weekly | Pet-safe |
| Black Lily Magnolia | Bright indirect light (just back from a sunny window) | Weekly during the growing season; reduce in winter | Pet-safe |
| Black Medick | Direct sun (at least 4-6 hours) | Low to moderate | Pet-safe |
| Black Mondo Grass | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Black Pagoda Lipstick Plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Black Pitcairnia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil feels barely moist, roughly every 5-7 days in summer | Pet-safe |
| Black Prince Echeveria | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Black Prince snapdragon | Direct sun (at least 4-6 hours) | Every 5–7 days; keep soil consistently moist | Pet-safe |
| Black sedge | Bright indirect light (just back from a sunny window) | Keep constantly moist to wet; tolerates standing water | Pet-safe |
| Black Spruce | Direct sun (at least 4-6 hours) | Consistent moisture; tolerates waterlogging — does not dry out between waterings | Pet-safe |
| Black Tree Fern | Bright indirect light (just back from a sunny window) | Daily in warm/windy conditions; 3 times per week in cool seasons | Pet-safe |
| Black-Eyed Susan Vine | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in the growing season | Pet-safe |
| Black-Headed Fountain Grass | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2 weeks once established | Pet-safe |
| Blackhaw Viburnum | Direct sun (at least 4-6 hours) | Weekly while establishing; established plants need water only in extended drought | Pet-safe |
| Bladder-flowered Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Blanc Double de Coubert Rose | Direct sun (at least 4-6 hours) | Weekly while establishing; drought-tolerant thereafter | Pet-safe |
| Blanket flower | Direct sun (at least 4-6 hours) | Every 7–14 days once established; water young plants more frequently | Pet-safe |
| Blaze Improved Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season, more during heat | Pet-safe |
| Blochman's Liveforever | Direct sun (at least 4-6 hours) | Every 10–14 days in the cool growing season (October–April); virtually none in summer | Pet-safe |
| Blonde Ambition Rush | Bright indirect light (just back from a sunny window) | Keep soil consistently moist to wet at all times | Pet-safe |
| Blonde Sedge | Bright indirect light (just back from a sunny window) | Moderate; drought-tolerant once established | Pet-safe |
| Blood Banana | Direct sun (at least 4-6 hours) | Roughly weekly in active growth; every 10-14 days in winter | Pet-safe |
| Blood Bromeliad | Bright indirect light (just back from a sunny window) | Keep cup filled; refresh every 1-2 weeks | Pet-safe |
| Bloodgood Japanese Maple | Bright indirect light (just back from a sunny window) | When the top 3–5 cm of soil is dry, roughly every 5–7 days in summer; weekly to fortnightly in autumn and spring | Pet-safe |
| Bloodleaf Plant | Bright indirect light (just back from a sunny window) | Every 7 days in spring/summer; every 10–14 days in autumn/winter | Pet-safe |
| Blue Anise Sage | Bright indirect light (just back from a sunny window) | Weekly | Pet-safe |
| Blue Boy cornflower | Direct sun (at least 4-6 hours) | Every 7–10 days | Pet-safe |
| Blue Cereus | Direct sun (at least 4-6 hours) | Every 14–21 days in summer; every 4–6 weeks in winter | Pet-safe |
| Blue Columnar Cactus | Direct sun (at least 4-6 hours) | When the top half of soil is dry, roughly every 10-14 days in summer; every 4-6 weeks in winter | Pet-safe |
| Blue Creeping Speedwell | Direct sun (at least 4-6 hours) | Moderate; allow the top few centimetres to dry between waterings | Pet-safe |
| Blue Dendrobium | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce to every 2–3 weeks in winter | Pet-safe |
| Blue Echeveria | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Blue Frills cape primrose | Bright indirect light (just back from a sunny window) | Every 7–10 days in the growing season; every 14–21 days in winter | Pet-safe |
| Blue Giant Sequoia | Direct sun (at least 4-6 hours) | Deeply weekly for 3–5 years during establishment | Pet-safe |
| Blue Hair Grass | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; water sparingly | Pet-safe |
| Blue Heaven Little Bluestem | Direct sun (at least 4-6 hours) | Every 14-21 days once established; very drought-tolerant | Pet-safe |
| Blue Lace Zygopetalum | Bright indirect light (just back from a sunny window) | Every 3–4 days in active growth, weekly in winter | Pet-safe |
| Blue Latan Palm | Direct sun (at least 4-6 hours) | Every 7–10 days in growing season; less in winter | Pet-safe |
| Blue Latan Palm | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-10 days in summer | Pet-safe |
| Blue Melon Cactus | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 10-14 days in summer and once every 3-4 weeks in winter | Pet-safe |
| Blue Oat Grass | Direct sun (at least 4-6 hours) | Low; drought-tolerant once established | Pet-safe |
| Blue Pickerelweed | Direct sun (at least 4-6 hours) | Rooted marginal — grow in wet soil or water up to 15 cm (6 in) deep | Pet-safe |
| Blue Rabbit's Foot Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of the mix is dry, roughly every 5-7 days | Pet-safe |
| Blue Rabbit's Foot Fern | Bright indirect light (just back from a sunny window) | When the growing medium is nearly dry, roughly every 5-10 days in summer | Pet-safe |
| Blue sedge | Bright indirect light (just back from a sunny window) | Water regularly until established; minimal thereafter | Pet-safe |
| Blue Spruce Sedum | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer, less in winter | Pet-safe |
| Blue Spruce Stonecrop | Direct sun (at least 4-6 hours) | Every 14-21 days in spring and summer; monthly or less in winter | Pet-safe |
| Blue Star Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is just barely dry, about every 5-7 days in growth | Pet-safe |
| Blue Vanda | Direct sun (at least 4-6 hours) | Daily in warm months when roots silver over; every 2-3 days in cool, dim weather | Pet-safe |
| Blue-Flowered Air Plant | Bright indirect light (just back from a sunny window) | Once or twice weekly | Pet-safe |
| Blue-flowered Torch | Bright indirect light (just back from a sunny window) | Mist 2–3 times per week and soak for 20 minutes weekly during spring and summer; reduce to misting only in winter. | Pet-safe |
| Blue-leaved Parlour Palm | Bright indirect light (just back from a sunny window) | Every 7–10 days in summer, every 14 days in winter | Pet-safe |
| Blue-stemmed Polypody | Bright indirect light (just back from a sunny window) | Every 5–7 days in spring and summer; every 10–14 days in winter | Pet-safe |
| bluejoint reedgrass | Direct sun (at least 4-6 hours) | Keep consistently moist to wet; suited to boggy and seasonally flooded ground | Pet-safe |
| Bluff Lettuce | Direct sun (at least 4-6 hours) | Every 3–4 weeks in winter/spring; very little to none in summer | Pet-safe |
| Blushing Bromeliad | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; flush and refill every 1-2 weeks. Keep mix lightly moist. | Pet-safe |
| Blushing Bromeliad | Bright indirect light (just back from a sunny window) | Keep the central cup filled; water the mix when the top 2-3 cm is dry | Pet-safe |
| Blushing Dunce Cap | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in spring and summer; very sparingly in autumn; almost none in winter | Pet-safe |
| Boat Orchid | Direct sun (at least 4-6 hours) | When the mix is dry, roughly every 7-10 days, less in winter | Pet-safe |
| Boat-Leaf Orthophytum | Bright indirect light (just back from a sunny window) | Every 7–10 days in growth; every 14–21 days in winter | Pet-safe |
| Boat-Shaped Orthophytum | Direct sun (at least 4-6 hours) | Moderate; water every 7–10 days, allowing the medium to dry between waterings | Pet-safe |
| Bogota kohleria | Bright indirect light (just back from a sunny window) | Every 7–10 days in growth; reduced to every 3–4 weeks in winter | Pet-safe |
| Boivin's Peperomia | Bright indirect light (just back from a sunny window) | Every 14–21 days in the growing season; every 4–6 weeks in winter | Pet-safe |
| Boke's Button Cactus | Direct sun (at least 4-6 hours) | When the mix has been dry for several days; roughly every 14-28 days in the growing season and once every 6-8 weeks in winter | Pet-safe |
| Bolivian Columnea | Bright indirect light (just back from a sunny window) | When top 2–3 cm of mix dries | Pet-safe |
| Bolivian Fuchsia | Bright indirect light (just back from a sunny window) | Every 5-7 days in the growing season; every 14 days in winter | Pet-safe |
| Bolus' Stomatium | Bright indirect light (just back from a sunny window) | Very sparingly in summer; every 2–3 weeks in autumn–spring | Pet-safe |
| Bonica Rose | Direct sun (at least 4-6 hours) | Deep watering once or twice weekly | Pet-safe |
| Borchers' Oroya | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, every 10-14 days in summer | Pet-safe |
| Borden's Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer; every 3–4 weeks in winter | Pet-safe |
| Border Forsythia | Direct sun (at least 4-6 hours) | Weekly during the first year, then only in prolonged drought | Pet-safe |
| Boscobel Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season; more in heat or sandy soil | Pet-safe |
| Boston Fern 'Dallas' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 4-7 days | Pet-safe |
| Boston Fern 'Fluffy Ruffles' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 3-5 days | Pet-safe |
| Bougainvillea 'Barbara Karst' | Direct sun (at least 4-6 hours) | Deeply but infrequently, only when the top 5 cm of soil is dry, roughly every 7-14 days | Pet-safe |
| Bougainvillea 'Raspberry Ice' | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 5-10 days | Pet-safe |
| Bougainvillea 'San Diego Red' | Direct sun (at least 4-6 hours) | Deep soak only when the top 5 cm of soil dries, about every 7-14 days | Pet-safe |
| Bow Bells Cattleya | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth; every 10–14 days in winter | Pet-safe |
| Bowl Lotus | Direct sun (at least 4-6 hours) | Keep submerged at all times; never allow the rhizome to dry out | Pet-safe |
| Bracteate Rhinephyllum | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in spring–summer; minimal in winter | Pet-safe |
| Bracted Aechmea | Bright indirect light (just back from a sunny window) | Every 10–14 days | Pet-safe |
| Bracted Dendrobium | Bright indirect light (just back from a sunny window) | Freely when in active growth (every 2-4 days); reduce sharply to monthly in the dry winter rest | Pet-safe |
| Bracted Lipstick Plant | Bright indirect light (just back from a sunny window) | Water when the top 2–3 cm of mix has dried; roughly every 7 days in summer, every 10–14 days in winter | Pet-safe |
| Bracted Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring/summer; every 3–4 weeks in winter | Pet-safe |
| Brain Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 2-3 weeks in spring and summer; nearly dry through winter | Pet-safe |
| Brandy Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the growing season | Pet-safe |
| Brassavola digbyana | Bright indirect light (just back from a sunny window) | Every 5-7 days in growth; far less in winter rest, every 2-3 weeks | Pet-safe |
| Brassia caudata | Bright indirect light (just back from a sunny window) | Water thoroughly, then let the top of the mix approach dryness; about every 5-7 days in growth | Pet-safe |
| Brazilian Edelweiss | Bright indirect light (just back from a sunny window) | When the top few cm of soil are dry during active growth; withhold during dormancy | Pet-safe |
| Brazilian Micro Sword | Bright indirect light (just back from a sunny window) | Permanently submerged aquatic plant | Pet-safe |
| Brazilian Plume | Bright indirect light (just back from a sunny window) | Regularly — keep soil consistently moist but never waterlogged | Pet-safe |
| Brazilian Plume Flower | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Brazilian Sinningia | Bright indirect light (just back from a sunny window) | When top 2–3 cm of compost feel dry | Pet-safe |
| Brazilian Waterweed | Bright indirect light (just back from a sunny window) | Permanently submerged | Pet-safe |
| Breadnut | Direct sun (at least 4-6 hours) | Water young trees 2–3 times per week; established trees are moderately drought tolerant but benefit from weekly deep irrigation in dry seasons. | Pet-safe |
| Brewer Spruce | Direct sun (at least 4-6 hours) | Moderate — water regularly during establishment; tolerates summer drought once established | Pet-safe |
| Bridal Wreath Spirea | Direct sun (at least 4-6 hours) | Water when the top 5 cm of soil is dry, about weekly while establishing | Pet-safe |
| Bridal Wreath Spirea | Direct sun (at least 4-6 hours) | Every 7-10 days during dry spells; established plants are drought-tolerant | Pet-safe |
| Brilliantissima red chokeberry | Direct sun (at least 4-6 hours) | Weekly during establishment; moderate once established | Pet-safe |
| Bristle-Leaved Air Plant | Bright indirect light (just back from a sunny window) | Soak weekly; mist 2–3 times per week in dry conditions | Pet-safe |
| Bristol Ruby Weigela | Direct sun (at least 4-6 hours) | Every 7-10 days during dry spells; established plants cope with moderate drought | Pet-safe |
| British Yellowhead | Direct sun (at least 4-6 hours) | Once or twice per week; drought-tolerant once established | Pet-safe |
| Britten's Tiger Jaws | Direct sun (at least 4-6 hours) | Every 2–4 weeks during the growing season (late summer–autumn); minimal in winter and spring | Pet-safe |
| Britten's Tiger Jaws | Direct sun (at least 4-6 hours) | Every 10–14 days in the growing season (autumn to spring); once a month or less in summer | Pet-safe |
| Broad-Leaved Lime | Bright indirect light (just back from a sunny window) | Weekly during establishment; supplemental watering in prolonged drought | Pet-safe |
| Broad-leaved Pondweed | Direct sun (at least 4-6 hours) | Fully submerged aquatic; grows in 30 cm to 150 cm of water | Pet-safe |
| Broad-Leaved Sea Lavender | Direct sun (at least 4-6 hours) | Every 2–3 weeks when established | Pet-safe |
| Broad-Petalled Cranesbill | Bright indirect light (just back from a sunny window) | Once or twice a week in the growing season; less in winter | Pet-safe |
| Broad-Sepal Gongora | Bright indirect light (just back from a sunny window) | Every 4–6 days during growth; every 10–14 days in winter | Pet-safe |
| Broadleaf Stonecrop | Direct sun (at least 4-6 hours) | Every 2–3 weeks in summer; once a month or less in winter | Pet-safe |
| Broadway's Melon Cactus | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 10-14 days in summer and once every 4 weeks in winter | Pet-safe |
| Bromeliad | Bright indirect light (just back from a sunny window) | Keep the central cup filled, soil barely moist | Pet-safe |
| Broom Palm | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-14 days in the growing season | Pet-safe |
| Broomsedge Bluestem | Direct sun (at least 4-6 hours) | Rainfall sufficient; no supplemental irrigation needed once established | Pet-safe |
| Bruch's Chin Cactus | Bright indirect light (just back from a sunny window) | When soil is completely dry, roughly every 10-14 days in summer; very sparingly in winter | Pet-safe |
| Brueggers Vanhouttea | Bright indirect light (just back from a sunny window) | Every 5–8 days; allow the top 2 cm of medium to dry slightly | Pet-safe |
| Brush Cherry | Bright indirect light (just back from a sunny window) | Weekly when young; every 10–14 days once established | Pet-safe |
| Buchanan's Sage | Bright indirect light (just back from a sunny window) | Every 5-7 days during the growing season | Pet-safe |
| Buddha's Belly Bamboo | Direct sun (at least 4-6 hours) | 2-3 times per week in warm seasons; reduce in winter | Pet-safe |
| Bueck's Thelocactus | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-14 days in summer; once a month or less in winter | Pet-safe |
| Buff Beauty Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the growing season; more in heat or against a warm wall | Pet-safe |
| Buffalo Cow Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, approximately every 14-21 days in summer | Pet-safe |
| Buining's Uebelmannia | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, roughly every 10-14 days in summer; once every 4-6 weeks or less in winter | Pet-safe |
| Bulbophyllum falcatum | Bright indirect light (just back from a sunny window) | Water when the roots and medium approach dryness, roughly every 2-4 days when mounted, less in pots | Pet-safe |
| Bulbophyllum longissimum | Bright indirect light (just back from a sunny window) | Water as the medium nears dryness, roughly every 2-4 days; more often when mounted in warm weather | Pet-safe |
| Bulbophyllum vaginatum | Bright indirect light (just back from a sunny window) | Water as the medium approaches dryness, around every 2-4 days; daily when mounted in heat | Pet-safe |
| Bulbous Trichodiadema | Direct sun (at least 4-6 hours) | Every 2–3 weeks during spring and summer; once a month or less in winter | Pet-safe |
| Bunny ears cactus | Direct sun (at least 4-6 hours) | When the compost is fully dry, roughly every 2-3 weeks in spring and summer | Pet-safe |
| Burchell's Mistletoe Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in the growing season; every 14-21 days in winter | Pet-safe |
| Burkwood Viburnum | Direct sun (at least 4-6 hours) | Water when the top 5 cm of soil dries, roughly weekly during establishment | Pet-safe |
| Burnet Rose | Direct sun (at least 4-6 hours) | Weekly during establishment; rarely once mature | Pet-safe |
| Burro's tail | Bright indirect light (just back from a sunny window) | When soil is dry, every 14-21 days | Pet-safe |
| Burser's Saxifrage | Bright indirect light (just back from a sunny window) | Every 7–10 days during growth; minimal in winter | Pet-safe |
| Burton's Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; reduce to every 3–4 weeks in winter | Pet-safe |
| Bush Hoya | Bright indirect light (just back from a sunny window) | Roughly weekly in summer; every 10-14 days in winter | Pet-safe |
| Bush Muhly | Direct sun (at least 4-6 hours) | Every 14-21 days during establishment; essentially rainfall-dependent once established in suitable climates | Pet-safe |
| Bushy Bluestem | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Butterfly Orchid | Bright indirect light (just back from a sunny window) | When the bark surface is nearly dry, every 7-10 days; never allow prolonged bone dryness | Pet-safe |
| Button Cactus | Direct sun (at least 4-6 hours) | When fully dry, about every 10-14 days in summer; keep nearly dry in winter | Pet-safe |
| Button Cactus | Direct sun (at least 4-6 hours) | When the mix is completely dry, roughly every 14-21 days in summer; once a month or less in winter | Pet-safe |
| Button Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Buttonhole Orchid | Direct sun (at least 4-6 hours) | When the top of the mix dries, roughly every 5-9 days | Pet-safe |
| C.D. Eason bell heather | Direct sun (at least 4-6 hours) | Weekly while establishing; every 2–3 weeks once settled | Pet-safe |
| Cabada Palm | Direct sun (at least 4-6 hours) | Every 3–5 days when young; drought-tolerant once established | Pet-safe |
| Cabbage Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of the growing medium feel dry, roughly every 5-7 days in summer | Pet-safe |
| Cacti (general care) | Direct sun (at least 4-6 hours) | Soak when the mix is bone dry — roughly every 2-4 weeks in summer | Pet-safe |
| Calanthe vestita | Bright indirect light (just back from a sunny window) | Water freely in summer growth; keep nearly dry through winter dormancy | Pet-safe |
| Calathea 'Flamestar' | Bright indirect light (just back from a sunny window) | Roughly weekly; water when the top 2-3 cm (about 1 inch) of soil feels dry | Pet-safe |
| Calathea 'Maui Queen' | Bright indirect light (just back from a sunny window) | Roughly once or twice a week in the growing season; water when the top inch of soil feels dry | Pet-safe |
| Calathea Albertii | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Beauty Star | Bright indirect light (just back from a sunny window) | When the top 25% of the soil is dry, roughly every 5-7 days in summer and less in winter | Pet-safe |
| Calathea Burgundy (Setosa Compactstar) | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Compact Star | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Calathea Crocata Tassmania | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is drying, roughly every 5-7 days in growth | Pet-safe |
| Calathea Crotalifera | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 4-7 days in warm weather | Pet-safe |
| Calathea Fasciata | Bright indirect light (just back from a sunny window) | Every 5-7 days, when the top inch of soil is just dry | Pet-safe |
| Calathea Freddie | Bright indirect light (just back from a sunny window) | When the top inch of soil is dry, roughly weekly in spring and summer and every 10-14 days in winter | Pet-safe |
| Calathea Lietzei | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Loeseneri (Brazilian Star) | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil dries, roughly every 5-7 days in growth | Pet-safe |
| Calathea Lutea (Cuban Cigar) | Bright indirect light (just back from a sunny window) | Keep consistently moist; water when the top 2-3 cm dries, often every 3-5 days in heat | Pet-safe |
| Calathea Majestica Sanderiana | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Medallion | Bright indirect light (just back from a sunny window) | When the top 25% of the soil dries out, roughly weekly | Pet-safe |
| Calathea Micans | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 4-6 days in growth | Pet-safe |
| Calathea Mirabilis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Network | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Calathea Network Gold | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea orbifolia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is just dry, roughly every 5-10 days in growth | Pet-safe |
| Calathea Ornata 'Sanderiana' | Bright indirect light (just back from a sunny window) | When the top 2-3cm of soil feels dry, roughly weekly | Pet-safe |
| Calathea Ornata Beauty | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Picturata | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Picturata 'Argentea' | Bright indirect light (just back from a sunny window) | Roughly weekly in growth; let the top 1-2cm dry first | Pet-safe |
| Calathea Princeps | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Roseopicta 'Surprise Star' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Sanderiana | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil dries, roughly every 5-7 days in growth | Pet-safe |
| Calathea Setosa | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Stromanthifolia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Veitchiana | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Vittata | Bright indirect light (just back from a sunny window) | Keep evenly moist; water when the top 1-2 inches of soil feels dry, roughly weekly in summer and less in winter | Pet-safe |
| Calathea Warscewiczii (Jungle Velvet) | Bright indirect light (just back from a sunny window) | Roughly weekly; when the top inch of soil is just dry | Pet-safe |
| Calathea Warscewiczii Jungle Velvet | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Warscewiczii Jungle Velvet Dark | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea White Fusion | Bright indirect light (just back from a sunny window) | When the top 2-3cm of soil feels dry, roughly every 5-10 days | Pet-safe |
| Calathea Yellow Fusion | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Zebrina Humilior | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Calendula | Direct sun (at least 4-6 hours) | Moderate — roughly weekly once established | Pet-safe |
| Calendula 'Indian Prince' | Direct sun (at least 4-6 hours) | Water when the top 2-3 cm of soil is dry, roughly weekly | Pet-safe |
| Calendula 'Radio' | Direct sun (at least 4-6 hours) | Water when the top 2-3 cm of soil is dry, roughly weekly | Pet-safe |
| Calibrachoa 'Cabaret Deep Blue' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, often daily in summer baskets | Pet-safe |
| Calibrachoa 'MiniFamous Double Amethyst' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, often daily in hot weather | Pet-safe |
| Calibrachoa 'Superbells Lemon Slice' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, often daily in baskets during summer heat | Pet-safe |
| Calibrachoa 'Superbells Trailing Blue' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, frequently daily in summer baskets | Pet-safe |
| Calico Aster | Bright indirect light (just back from a sunny window) | Water to establish, then occasionally; tolerates dry soil | Pet-safe |
| California Fescue | Bright indirect light (just back from a sunny window) | Water every 10-14 days during the first growing season; established plants are summer-dormant and very drought-tolerant, needing little or no supplemental water | Pet-safe |
| California Sunset | Direct sun (at least 4-6 hours) | Every 10–14 days in spring/summer; every 3–4 weeks in autumn/winter | Pet-safe |
| Callicarpa 'Pearl Glam' | Direct sun (at least 4-6 hours) | Water weekly during the first season; established plants are fairly drought-tolerant and need water mainly in dry spells | Pet-safe |
| Camas | Bright indirect light (just back from a sunny window) | Regular during spring growth; tolerates summer drought when dormant | Pet-safe |
| Cambria Orchid | Bright indirect light (just back from a sunny window) | When the surface of the mix begins to dry, roughly every 4-7 days | Pet-safe |
| Camellia 'Alba Plena' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, every 7-10 days during active growth | Pet-safe |
| Camellia 'Anticipation' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 7-10 days during the growing season | Pet-safe |
| Camellia 'Bob Hope' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days during the growing season | Pet-safe |
| Camellia 'Brushfield's Yellow' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost or soil is dry, roughly every 5-7 days during active growth | Pet-safe |
| Camellia 'Debbie' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 7-10 days in the growing season | Pet-safe |
| Camellia 'Dixie Knight' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil or compost is dry, roughly every 5-7 days in the growing season | Pet-safe |
| Camellia 'Donation' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry; keep evenly moist in late summer | Pet-safe |
| Camellia 'Elegans' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days during growth | Pet-safe |
| Camellia 'Hagoromo' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost or soil is dry, roughly every 5-7 days during active growth | Pet-safe |
| Camellia 'J.C. Williams' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 7-10 days during the growing season | Pet-safe |
| Camellia 'Jury's Yellow' | Bright indirect light (just back from a sunny window) | Keep soil evenly moist; water deeply once or twice weekly in summer, especially during bud set | Pet-safe |
| Camellia 'Jury's Yellow' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 7-10 days during active growth | Pet-safe |
| Camellia 'Kramer's Supreme' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days during active growth | Pet-safe |
| Camellia 'Midnight Magic' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 7-10 days during active growth | Pet-safe |
| Camellia 'Mine-no-Yuki' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 7-10 days through the growing season | Pet-safe |
| Camellia 'Nuccio's Gem' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 7-10 days in active growth | Pet-safe |
| Camellia 'Spring Festival' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in the growing season | Pet-safe |
| Camellia 'Water Lily' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil or compost is dry, roughly every 5-7 days during the growing season | Pet-safe |
| Camellia 'Yuletide' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days during active growth | Pet-safe |
| Campanula glomerata 'Superba' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil dries, about weekly in dry spells | Pet-safe |
| Campbell's Lycaste | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; reduce sharply after leaf drop | Pet-safe |
| Campbell's Magnolia | Direct sun (at least 4-6 hours) | Every 7-10 days during the first three growing seasons; established trees need watering only during prolonged summer drought | Pet-safe |
| Camphor-leaf Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in the growing season; every 2–3 weeks in winter | Pet-safe |
| Campos Porto Fuchsia | Bright indirect light (just back from a sunny window) | Regular during growth; reduce in winter | Pet-safe |
| Camu Camu | Bright indirect light (just back from a sunny window) | Every 2–4 days; keep consistently moist to wet | Pet-safe |
| Can Can Heuchera | Bright indirect light (just back from a sunny window) | Keep evenly moist; water when the top 2-3 cm is dry, about every 5-7 days in summer | Pet-safe |
| Canary creeper | Bright indirect light (just back from a sunny window) | Water regularly to keep soil evenly moist, roughly every 5–7 days | Pet-safe |
| Canary Island Date Palm | Direct sun (at least 4-6 hours) | Every 7-10 days in summer; roughly every 2-3 weeks in winter | Pet-safe |
| Canary Island Sage | Direct sun (at least 4-6 hours) | Every 10-14 days; minimal in cool or wet periods | Pet-safe |
| Canary Island Sea Lavender | Direct sun (at least 4-6 hours) | Every 1–2 weeks in growth; monthly in winter | Pet-safe |
| Candelabra Sage | Direct sun (at least 4-6 hours) | Every 10-14 days in the growing season | Pet-safe |
| Candelabrum Liveforever | Direct sun (at least 4-6 hours) | Every 1–2 weeks in autumn and winter; minimal in spring; none in summer | Pet-safe |
| Candia Sulcorebutia | Direct sun (at least 4-6 hours) | Every 10-14 days in summer; virtually none from October to March | Pet-safe |
| candy corn plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in active growth, every 14 days in winter | Pet-safe |
| Candy Corn Plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of potting mix is dry, roughly every 7-10 days | Pet-safe |
| Candy Stripe Creeping Phlox | Direct sun (at least 4-6 hours) | Every 7–10 days during the establishment year; drought-tolerant thereafter | Pet-safe |
| Canigueral's Crown Cactus | Direct sun (at least 4-6 hours) | Every 10-14 days in summer; once a month during winter dormancy | Pet-safe |
| Canyon Liveforever | Direct sun (at least 4-6 hours) | Every 2–3 weeks in winter/spring; minimal to none in summer | Pet-safe |
| Canyon Sage | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established | Pet-safe |
| Cape jewels | Direct sun (at least 4-6 hours) | Every 3–5 days in containers; every 5–7 days in borders | Pet-safe |
| Cape Primrose | Bright indirect light (just back from a sunny window) | every 7–10 days in the growing season, every 14–21 days in winter | Pet-safe |
| Cape Primrose | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry; less in winter | Pet-safe |
| Cape Primrose | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-10 days | Pet-safe |
| Cape Primrose 'Bristol's Party Girl' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Capped Catasetum | Direct sun (at least 4-6 hours) | Abundant daily to every-other-day during growth; dry rest in winter | Pet-safe |
| Caradonna Salvia | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, about weekly until established | Pet-safe |
| Caranday Palm | Direct sun (at least 4-6 hours) | When the top 5-8 cm of soil is dry, roughly every 10-14 days in summer; every 3-4 weeks in dry season / winter | Pet-safe |
| Cardinal Flower Sinningia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Cardinal Sage | Bright indirect light (just back from a sunny window) | Freely during active growth; sparingly in winter | Pet-safe |
| Carding Mill Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week through the growing season, more in heat | Pet-safe |
| Carefree Wonder Rose | Direct sun (at least 4-6 hours) | Deep soak once or twice a week depending on heat | Pet-safe |
| Caribbean Royal Palm | Direct sun (at least 4-6 hours) | Twice weekly when young; established trees weekly or as needed | Pet-safe |
| Caribbean Royal Palm | Direct sun (at least 4-6 hours) | When the top 4-6 cm of soil is dry, roughly every 7-10 days in the growing season; every 14-21 days in drier winter months | Pet-safe |
| Carmen's Pincushion | Direct sun (at least 4-6 hours) | Every 10-14 days in the spring-summer growing season when the top 2-3 cm of soil is dry; every 4-6 weeks or less in winter | Pet-safe |
| Carnarvon Fan Palm | Direct sun (at least 4-6 hours) | Weekly during active growth; every 2–3 weeks when established | Pet-safe |
| Carnauba Wax Palm | Direct sun (at least 4-6 hours) | When the top 5-10 cm of soil is dry, roughly every 10-14 days in the growing season; every 3-5 weeks in winter | Pet-safe |
| Carnival goldfish plant | Bright indirect light (just back from a sunny window) | Water when the top third of the growing medium dries out — roughly every 7–10 days in the growing season, reducing to every 14 days in winter. | Pet-safe |
| Carnivorous Bromeliad | Direct sun (at least 4-6 hours) | Keep the central tank filled with distilled or rainwater; water the substrate when the surface begins to dry, roughly every 5-7 days | Pet-safe |
| Carob | Direct sun (at least 4-6 hours) | When soil is dry well below the surface, every 1-3 weeks once established | Pet-safe |
| Carol's Ruschia | Direct sun (at least 4-6 hours) | When soil is completely dry, approximately every 10-14 days in spring-summer; once monthly or less in winter | Pet-safe |
| Carolina Hemlock | Bright indirect light (just back from a sunny window) | Weekly during establishment; monthly deep watering once established in cool climates | Pet-safe |
| Carolina Mosquito Fern | Bright indirect light (just back from a sunny window) | Permanently floating on water surface | Pet-safe |
| Carolina Queen Lotus | Direct sun (at least 4-6 hours) | Permanently submerged; maintain 5–15 cm (2–6 in) of water over the soil surface for established plants | Pet-safe |
| Carousel Little Bluestem | Direct sun (at least 4-6 hours) | Every 14-21 days during establishment; minimal once established | Pet-safe |
| Carpathian bellflower | Direct sun (at least 4-6 hours) | Every 5–7 days during active growth; moderate moisture needs | Pet-safe |
| Carpentaria Palm | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in warm weather | Pet-safe |
| Carrion Flower (Stapelia gigantea) | Direct sun (at least 4-6 hours) | Every 2-3 weeks in active growth (spring-autumn); keep nearly dry in winter | Pet-safe |
| Cas Guava | Direct sun (at least 4-6 hours) | Water deeply 2–3 times per week in the growing season; reduce to once weekly in winter. | Pet-safe |
| Cascade Purple Aubrieta | Direct sun (at least 4-6 hours) | Weekly during active growth; minimal in summer dormancy | Pet-safe |
| Cascadia trailing petunia | Direct sun (at least 4-6 hours) | Every 2-3 days in warm weather; check daily in summer heat | Pet-safe |
| Cassytha Rhipsalis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Cat Palm | Bright indirect light (just back from a sunny window) | Keep consistently moist | Pet-safe |
| Catesby's Pitcher Plant | Direct sun (at least 4-6 hours) | Tray method with seasonal reduction | Pet-safe |
| Cattleya 'Why Not' | Bright indirect light (just back from a sunny window) | When the bark dries, roughly every 5-7 days in growth | Pet-safe |
| Cattleya luteola | Bright indirect light (just back from a sunny window) | When the mix approaches dry, roughly every 5-7 days in growth | Pet-safe |
| Cattleya orchid | Bright indirect light (just back from a sunny window) | When the bark mix is nearly dry, every 5-10 days | Pet-safe |
| Cattleya walkeriana | Bright indirect light (just back from a sunny window) | When the mix is nearly dry, roughly every 5-7 days in growth; reduced after flowering | Pet-safe |
| Caucasian Rock Cress | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks once established | Pet-safe |
| Cavendish Banana | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water when the top 2-3 cm dries, often every 2-4 days in active growth | Pet-safe |
| Cavendish's Trichocentrum | Bright indirect light (just back from a sunny window) | Every 7-10 days in growth; every 14-21 days during the winter rest | Pet-safe |
| Cecile Brunner Climbing Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly while young; established plants are fairly drought-tolerant and need water mainly in dry spells | Pet-safe |
| Cedar Bay Cherry | Direct sun (at least 4-6 hours) | Water established plants once or twice per week; newly planted specimens require daily watering for the first 4–6 weeks. | Pet-safe |
| Cedros Island Liveforever | Direct sun (at least 4-6 hours) | Every 4–6 weeks in summer (dormant), every 2–3 weeks in winter–spring (active) | Pet-safe |
| Celosia (cockscomb) | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Celosia argentea var. cristata 'Chief Mix' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-5 days | Pet-safe |
| Celosia argentea var. plumosa 'Fresh Look Yellow' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-5 days | Pet-safe |
| Celosia argentea var. spicata 'Cramer's Amazon' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-6 days once established | Pet-safe |
| Centaurea 'Amethyst in Snow' | Direct sun (at least 4-6 hours) | Weekly through the first season; established clumps are drought-tolerant | Pet-safe |
| Central Australian Cabbage Palm | Direct sun (at least 4-6 hours) | Sparingly; allow soil to dry between waterings | Pet-safe |
| Central Australian Cabbage Palm | Direct sun (at least 4-6 hours) | Water deeply every 14-21 days; highly drought-tolerant once established | Pet-safe |
| Century Yellow Feather Celosia | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Ceropegia woodii f. variegata | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Cettos Achimenes | Bright indirect light (just back from a sunny window) | Evenly moist during the growing season; completely dry during winter dormancy | Pet-safe |
| Chagual | Direct sun (at least 4-6 hours) | every 7–14 days in summer, rarely in winter | Pet-safe |
| Chain Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Chain Pleurothallis | Bright indirect light (just back from a sunny window) | Every 2-3 days; do not allow to dry completely | Pet-safe |
| Chain Rhipsalis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, approximately every 7-10 days in summer; reduce to every 14-21 days in winter | Pet-safe |
| Chalk Liveforever | Direct sun (at least 4-6 hours) | Every 3–5 weeks in winter/spring; suspend in summer | Pet-safe |
| Chamaerops Humilis 'Vulcano' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, every 7-14 days in summer | Pet-safe |
| Chamaerops Humilis Cerifera | Direct sun (at least 4-6 hours) | When the top few cm of soil are dry; drought-tolerant once established | Pet-safe |
| Chanet's Dunce Cap | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; monthly or less in winter | Pet-safe |
| Chantilly Peach snapdragon | Direct sun (at least 4-6 hours) | Every 5–7 days; keep soil evenly moist but not waterlogged | Pet-safe |
| Charlotte Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in growth; more in heat | Pet-safe |
| Cherokee Chief Dogwood | Bright indirect light (just back from a sunny window) | Weekly deep watering; more in summer drought | Pet-safe |
| Cherry of the Rio Grande | Direct sun (at least 4-6 hours) | Water 2–3 times per week during warm months; once weekly in cooler, dormant periods. | Pet-safe |
| Cherry of the Río Grande | Direct sun (at least 4-6 hours) | Water thoroughly 2–3 times per week in summer; reduce to once every 7–10 days in winter. | Pet-safe |
| Chiapas Air Plant | Bright indirect light (just back from a sunny window) | Once weekly | Pet-safe |
| Chilean Bamboo | Bright indirect light (just back from a sunny window) | Weekly during establishment; twice weekly in dry summer heat | Pet-safe |
| Chilean Butterwort | Bright indirect light (just back from a sunny window) | Water from below by brief tray sitting every 5-10 days when the soil surface begins to dry; dry out slightly between waterings in winter | Pet-safe |
| Chimanta sun pitcher | Bright indirect light (just back from a sunny window) | Daily; media must remain permanently moist | Pet-safe |
| Chin Cactus | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring/summer; every 3–4 weeks in autumn; withhold in winter | Pet-safe |
| Chin Cactus | Bright indirect light (just back from a sunny window) | When the soil is fully dry, about every 10-14 days in growth; none in winter | Pet-safe |
| China aster | Direct sun (at least 4-6 hours) | 2–3 times per week in warm weather; once per week in cool conditions | Pet-safe |
| Chinese Arborvitae | Direct sun (at least 4-6 hours) | Moderate — water regularly until established; drought-tolerant once established | Pet-safe |
| Chinese Douglas Fir | Direct sun (at least 4-6 hours) | Weekly when young; every 2 weeks once established | Pet-safe |
| Chinese Dunce Cap | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season (spring–summer); sparingly in winter | Pet-safe |
| Chinese Fan Palm | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil dries out, roughly every 7-14 days | Pet-safe |
| Chinese Ground Orchid | Bright indirect light (just back from a sunny window) | Keep evenly moist during active growth (spring and summer), watering every 5-7 days; allow to dry out naturally in autumn as the plant goes dormant | Pet-safe |
| Chinese Hemlock | Bright indirect light (just back from a sunny window) | Every 1–2 weeks when young; every 2–3 weeks once established | Pet-safe |
| Chinese Larch | Direct sun (at least 4-6 hours) | Regular during establishment and growing season; reduced in dormancy | Pet-safe |
| Chinese money plant | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, every 7-10 days | Pet-safe |
| Chinese Timber Bamboo | Direct sun (at least 4-6 hours) | 2–3 times per week in the shooting season (spring); weekly otherwise | Pet-safe |
| Chinese Tupelo | Bright indirect light (just back from a sunny window) | Regularly during establishment; once or twice a week in dry spells | Pet-safe |
| Chinese Weeping Cypress | Direct sun (at least 4-6 hours) | Regular during establishment; drought-tolerant once mature | Pet-safe |
| Chirita micromusa | Bright indirect light (just back from a sunny window) | Keep evenly moist; water when the soil surface just begins to dry, roughly every 4-7 days | Pet-safe |
| Chocolate Cosmos | Direct sun (at least 4-6 hours) | Keep evenly moist through summer; water roughly weekly, more in heat, less once dormant | Pet-safe |
| Chocolate orchid | Bright indirect light (just back from a sunny window) | When the mix is nearly dry, roughly every 5-9 days | Pet-safe |
| Chocolate Soldier episcia | Bright indirect light (just back from a sunny window) | Every 5–7 days in growing season, every 10–14 days in winter | Pet-safe |
| Christmas cactus | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, every 7-10 days | Pet-safe |
| Christmas Jewels Bromeliad | Bright indirect light (just back from a sunny window) | Refresh central cup weekly; water soil every 2–3 weeks | Pet-safe |
| Christmas Orchid | Bright indirect light (just back from a sunny window) | When the bark dries, roughly every 5-7 days in growth | Pet-safe |
| Christmas Orchid | Bright indirect light (just back from a sunny window) | When the potting medium is nearly dry, approximately every 7-10 days in active growth; reduce to every 14-21 days in autumn | Pet-safe |
| Christmas Palm | Direct sun (at least 4-6 hours) | Every 5–7 days; allow top 2–3 cm of soil to dry between waterings | Pet-safe |
| Christmas Palm | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 5-7 days in warmth | Pet-safe |
| Christmas Tree Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 14-21 days in the growing season and once a month or less in winter | Pet-safe |
| Chusan Palm | Bright indirect light (just back from a sunny window) | Weekly in summer, monthly in winter | Pet-safe |
| Cigarette Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks in autumn through early spring; none or near-none in summer | Pet-safe |
| Cilician Fir | Direct sun (at least 4-6 hours) | Moderate; drought-tolerant once established | Pet-safe |
| Cinco de Mayo Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week through the growing season, more in heat | Pet-safe |
| Cinderella Miniature Rose | Direct sun (at least 4-6 hours) | Keep soil evenly moist; water when the top 2-3 cm is dry, roughly twice weekly and more in heat | Pet-safe |
| Cinnamon Bunny Ears | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 2-3 weeks in summer; nearly dry in winter | Pet-safe |
| Cissus Discolor | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, about every 4-7 days in warmth | Pet-safe |
| Cistus-Flowered Sundew | Direct sun (at least 4-6 hours) | Water regularly via the tray method throughout autumn–spring active growth; cease watering entirely from late spring through summer dormancy. | Pet-safe |
| Clamshell Orchid | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; every 10–14 days in winter | Pet-safe |
| Clara Fan Palm | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is completely dry, roughly every 14-21 days in summer | Pet-safe |
| Clarke's Cranesbill | Bright indirect light (just back from a sunny window) | Regularly during establishment; once established, once a week in dry periods | Pet-safe |
| Clasping Sage | Bright indirect light (just back from a sunny window) | Weekly to fortnightly | Pet-safe |
| Claw Sage | Direct sun (at least 4-6 hours) | Water when the top 3–5 cm of soil feels dry | Pet-safe |
| Cleft Phlox | Direct sun (at least 4-6 hours) | Every 10–14 days when establishing; monthly once established in dry periods | Pet-safe |
| Cleistocactus baumannii | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly weekly in summer; sparingly in winter | Pet-safe |
| Cleistocactus Hyalacanthus | Direct sun (at least 4-6 hours) | When the mix is fully dry, about every 7-10 days in summer; keep dry in winter | Pet-safe |
| Cleveland Sage | Direct sun (at least 4-6 hours) | Very infrequent after establishment — once monthly or less in summer | Pet-safe |
| Cliff African violet | Bright indirect light (just back from a sunny window) | Every 10–14 days | Pet-safe |
| Cliff African Violet | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Cliff Date Palm | Direct sun (at least 4-6 hours) | Deeply every 7-10 days while establishing, then moderate | Pet-safe |
| Cliff Date Palm | Direct sun (at least 4-6 hours) | Water when the top 4-5 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Climbing Iceberg Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season, more during heat | Pet-safe |
| Cloud Liveforever | Direct sun (at least 4-6 hours) | Every 1–2 weeks in cool season (October–April); completely withheld June–September | Pet-safe |
| Clowes' Miltonia | Bright indirect light (just back from a sunny window) | Every 3–4 days in growth, reduce slightly in winter | Pet-safe |
| Clowes' Miltonia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of the mix feels dry, roughly every 5-7 days in summer | Pet-safe |
| Clubmoss cassiope | Bright indirect light (just back from a sunny window) | Regularly; soil should remain consistently moist throughout the growing season | Pet-safe |
| Clumping Bamboo | Bright indirect light (just back from a sunny window) | Twice to three times per week during establishment; weekly once established | Pet-safe |
| Clumping Blue Bamboo | Bright indirect light (just back from a sunny window) | Consistently moist throughout the growing season; water every 5–7 days or as needed to keep soil from drying out | Pet-safe |
| Clustered bellflower | Direct sun (at least 4-6 hours) | Weekly during dry spells; moderate water needs | Pet-safe |
| Clustered Dendrobium | Bright indirect light (just back from a sunny window) | Every 5-7 days in summer; reduce sharply to monthly or less in winter | Pet-safe |
| Clustered Dunce Cap | Direct sun (at least 4-6 hours) | Weekly to fortnightly in active growth (spring–autumn); minimal in winter dormancy | Pet-safe |
| Clustered Freesia | Direct sun (at least 4-6 hours) | Moderate during growth; reduce to dry after dormancy | Pet-safe |
| Clustered Silver Skin | Direct sun (at least 4-6 hours) | Every 2–4 weeks during autumn–early winter growth; minimal in spring; completely withheld in summer | Pet-safe |
| Clustered Sinningia | Bright indirect light (just back from a sunny window) | Every 7–10 days during the growing season; withhold entirely during dormancy | Pet-safe |
| Clustered Specklinia | Bright indirect light (just back from a sunny window) | Every 2-3 days; keep medium consistently moist | Pet-safe |
| Clytie kohleria | Bright indirect light (just back from a sunny window) | Every 7–10 days in growth; sparingly in winter | Pet-safe |
| Coarctata Haworthia | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Coast Rock Cress | Direct sun (at least 4-6 hours) | Weekly in the growing season; reduce to monthly or less when summer-dormant | Pet-safe |
| Cob Cactus | Direct sun (at least 4-6 hours) | Every 2–3 weeks in spring and summer; virtually none in winter | Pet-safe |
| Cobra Lily | Direct sun (at least 4-6 hours) | Keep constantly damp to wet, year-round | Pet-safe |
| Cobweb Houseleek | Direct sun (at least 4-6 hours) | When soil is fully dry, every 10-14 days in growth; sparingly in winter | Pet-safe |
| Cockleshell butterfly orchid | Bright indirect light (just back from a sunny window) | Weekly in growth; reduce in winter | Pet-safe |
| Cockleshell Orchid | Bright indirect light (just back from a sunny window) | When the bark mix is nearly dry, roughly every 5-8 days | Pet-safe |
| Cockscomb | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 4-6 days in summer | Pet-safe |
| Coconut Palm | Direct sun (at least 4-6 hours) | Keep consistently moist; water every 3-5 days in heat, never letting it dry out fully | Pet-safe |
| Coelogyne cristata | Bright indirect light (just back from a sunny window) | Every 4-7 days in growth; sparingly during the winter rest | Pet-safe |
| Coelogyne flaccida | Bright indirect light (just back from a sunny window) | Every 4-7 days in growth; reduced over winter | Pet-safe |
| Coelogyne massangeana | Bright indirect light (just back from a sunny window) | Every 3-6 days in growth; slightly reduced but rarely dry in winter | Pet-safe |
| Coin-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring/summer; reduce to every 2–3 weeks in winter | Pet-safe |
| Colima Butterwort | Bright indirect light (just back from a sunny window) | Water every 5–7 days; allow the surface to slightly dry between waterings | Pet-safe |
| Columbian Peperomia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Column Aubrieta | Direct sun (at least 4-6 hours) | Weekly during spring growth; very sparingly in summer | Pet-safe |
| Columnae Snow-in-Summer | Direct sun (at least 4-6 hours) | Low; drought-tolerant once established | Pet-safe |
| Columnar Douglas Fir | Direct sun (at least 4-6 hours) | Moderate during establishment; reduced once established | Pet-safe |
| Columnea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 5-7 days | Pet-safe |
| Columnea 'Aladdin's Lamp' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Columnea 'Inferno' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Columnea 'Light Prince' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Columnea 'Robin' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Columnea hirta | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Columnea linearis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is just dry, roughly every 5-7 days in growth | Pet-safe |
| Columnea microphylla | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is just dry, roughly every 5-7 days in growth | Pet-safe |
| Comb Speedwell | Direct sun (at least 4-6 hours) | Every 2–3 weeks; very drought-tolerant | Pet-safe |
| Comb-Spined Uebelmannia | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, roughly every 10-14 days in summer; reduce to once every 5-6 weeks in winter | Pet-safe |
| Common African Violet | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of potting mix is dry, roughly every 7-10 days | Pet-safe |
| Common Bamboo | Direct sun (at least 4-6 hours) | Deeply 2-3 times per week; daily in hot or dry conditions | Pet-safe |
| Common Club-rush | Direct sun (at least 4-6 hours) | Permanently aquatic; plant at 30–150 cm (12–60 in) water depth | Pet-safe |
| Common Cordgrass | Direct sun (at least 4-6 hours) | Permanent wetland/tidal immersion | Pet-safe |
| Common Evening Primrose | Direct sun (at least 4-6 hours) | Every 10–14 days; highly tolerant of drought once established | Pet-safe |
| Common Foxtail Cactus | Direct sun (at least 4-6 hours) | When the potting mix is completely dry, roughly every 10-21 days in summer; very sparingly in winter | Pet-safe |
| Common Goldfish Plant | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry | Pet-safe |
| Common Heather | Direct sun (at least 4-6 hours) | Water weekly in dry spells for the first two seasons; established plants are moderately drought-tolerant | Pet-safe |
| Common immortelle | Direct sun (at least 4-6 hours) | Every 7–10 days; allow soil to dry between waterings | Pet-safe |
| Common Jasmine | Direct sun (at least 4-6 hours) | Water regularly while establishing and in dry spells; water when the top few cm of soil dries | Pet-safe |
| Common Lime | Direct sun (at least 4-6 hours) | Regular in first 2–3 years; occasional once established | Pet-safe |
| Common Mallow | Direct sun (at least 4-6 hours) | Low once established | Pet-safe |
| Common Quaking Grass | Direct sun (at least 4-6 hours) | Rarely; drought-tolerant once established | Pet-safe |
| Common Rush | Direct sun (at least 4-6 hours) | Permanently wet or standing water to 15 cm (6 in) deep | Pet-safe |
| Common Saltmarsh Grass | Direct sun (at least 4-6 hours) | Tidal — periodic saltwater flooding | Pet-safe |
| Common Sea Lavender | Direct sun (at least 4-6 hours) | Low to moderate — drought-tolerant once established; tolerates periodic waterlogging | Pet-safe |
| Common Spike-rush | Direct sun (at least 4-6 hours) | Permanently aquatic to waterlogged; plant at 0–30 cm (0–12 in) water depth | Pet-safe |
| Common teasel | Direct sun (at least 4-6 hours) | Rarely needs supplemental watering once established; water seedlings regularly | Pet-safe |
| Common Tussock Grass | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; tolerates extended dry periods | Pet-safe |
| Common Water Hyacinth | Direct sun (at least 4-6 hours) | Free-floating aquatic — roots permanently submerged in open water | Pet-safe |
| Common Water Hyacinth | Direct sun (at least 4-6 hours) | Aquatic — free-floating on the water surface permanently | Pet-safe |
| Compact Angraecum | Bright indirect light (just back from a sunny window) | Every 2–4 days in summer; every 7–14 days in winter | Pet-safe |
| Compact Japanese Umbrella Pine | Bright indirect light (just back from a sunny window) | Weekly during growing season; reduce in winter | Pet-safe |
| Compact Plume Japanese Cedar | Bright indirect light (just back from a sunny window) | Regularly throughout the growing season; reduce slightly in winter | Pet-safe |
| Compass Plant | Direct sun (at least 4-6 hours) | Every 2-4 weeks once established | Pet-safe |
| Compassion Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly when young; established plants when the top 5 cm of soil is dry | Pet-safe |
| Compton's Gibbaeum | Direct sun (at least 4-6 hours) | Every 2–4 weeks in autumn and spring (active growth); withheld or near-dry in summer and reduced in winter | Pet-safe |
| Compton's Living Stone | Direct sun (at least 4-6 hours) | Sparingly every 2-4 weeks in summer; none from late autumn through winter leaf renewal | Pet-safe |
| Confetti Polka Dot Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; reduce in winter | Pet-safe |
| Confused Huernia | Bright indirect light (just back from a sunny window) | Every 14–21 days during active growth (spring–autumn); once monthly or less in winter | Pet-safe |
| Congo cockatoo impatiens | Bright indirect light (just back from a sunny window) | Every 3–5 days; keep soil evenly moist | Pet-safe |
| Constance Spry Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly while establishing; mature plants when the top few centimetres of soil dry | Pet-safe |
| Cook Pine | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Cooper's Haworthia | Bright indirect light (just back from a sunny window) | Every 1-3 weeks in spring/summer; about once a month in winter | Pet-safe |
| Cooper's Haworthia (Pilifera) | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in summer, far less in winter | Pet-safe |
| Copiapoa cinerea | Direct sun (at least 4-6 hours) | Sparingly when fully dry in summer, roughly every 2-3 weeks; little to none in winter | Pet-safe |
| Copiapoa humilis | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 2-3 weeks in summer; keep bone-dry in winter | Pet-safe |
| Copiapoa hypogaea | Direct sun (at least 4-6 hours) | Sparingly when fully dry in summer, roughly every 2-3 weeks; little to none in winter | Pet-safe |
| Copiapoa krainziana | Direct sun (at least 4-6 hours) | When soil is completely dry, about every 2-3 weeks in summer; keep dry in winter | Pet-safe |
| Copper Leaf Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth; reduce significantly in dormancy | Pet-safe |
| Coppertone Stonecrop | Direct sun (at least 4-6 hours) | Every 1-2 weeks in spring/summer; roughly monthly in winter | Pet-safe |
| Coquimbo Copiapoa | Direct sun (at least 4-6 hours) | Every 14-21 days in summer; once a month or less in winter | Pet-safe |
| Coral Bark Japanese Maple 'Sango-kaku' | Bright indirect light (just back from a sunny window) | Once or twice weekly through the growing season | Pet-safe |
| Coral Bark Maple | Bright indirect light (just back from a sunny window) | When the top 3–5 cm of soil is dry, roughly every 5–7 days in summer; reduce in winter | Pet-safe |
| Coral Berry Bromeliad | Bright indirect light (just back from a sunny window) | Keep central cup filled; water soil every 2–3 weeks | Pet-safe |
| Coral Berry Bromeliad | Bright indirect light (just back from a sunny window) | Keep the central cup filled; water compost every 10-14 days | Pet-safe |
| Coral Cattleya | Bright indirect light (just back from a sunny window) | When the mix dries, roughly every 5-7 days in growth | Pet-safe |
| Coreopsis 'Jethro Tull' | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, roughly every 10-14 days once established | Pet-safe |
| Coreopsis 'Limerock Ruby' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Coreopsis 'Mercury Rising' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Coreopsis 'Moonbeam' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry; weekly to establish, then sparingly | Pet-safe |
| Coreopsis 'Moonbeam' | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 10-14 days; very drought-tolerant once established | Pet-safe |
| Coreopsis 'Route 66' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Coreopsis 'Ruby Sunset' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Coreopsis 'Sienna Sunset' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Coreopsis 'Sunkiss' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Coreopsis 'Sunray' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Coreopsis 'Uptick Gold and Bronze' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Coreopsis 'Zagreb' | Direct sun (at least 4-6 hours) | Water to establish, then only in extended drought; drought-tolerant once settled | Pet-safe |
| Coreopsis grandiflora 'Early Sunrise' | Direct sun (at least 4-6 hours) | Water to establish, then only during drought; drought-tolerant once settled | Pet-safe |
| Cork-Stemmed Passionflower | Direct sun (at least 4-6 hours) | Once or twice a week until established; less once mature | Pet-safe |
| Corkscrew Rush | Bright indirect light (just back from a sunny window) | Keep soil permanently wet; top up the water saucer every 3–5 days | Pet-safe |
| Cornelia Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season, increasing in heat | Pet-safe |
| Cornflower | Direct sun (at least 4-6 hours) | Low to moderate — water during establishment only | Pet-safe |
| Cornish heath | Direct sun (at least 4-6 hours) | Weekly while establishing; every 2–3 weeks once settled | Pet-safe |
| Cornish Heath Mrs D.F. Maxwell | Direct sun (at least 4-6 hours) | Water weekly during dry spells, especially in the first two years | Pet-safe |
| Cornus kousa 'Miss Satomi' | Direct sun (at least 4-6 hours) | Water deeply weekly while establishing; supplement in dry spells | Pet-safe |
| Corsage Orchid | Bright indirect light (just back from a sunny window) | When the mix has dried, roughly every 5-7 days in growth | Pet-safe |
| Coryphantha macromeris | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 10-14 days in growth; keep dry in winter | Pet-safe |
| Coryphantha vivipara | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 10-14 days in growth; none in winter | Pet-safe |
| Cosmos | Direct sun (at least 4-6 hours) | Weekly watering | Pet-safe |
| Cosmos 'Sensation' | Direct sun (at least 4-6 hours) | Water young plants until established, then only in prolonged drought; drought-tolerant once rooted | Pet-safe |
| Cosmos bipinnatus 'Picotee' | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, about every 7-10 days | Pet-safe |
| Cosmos bipinnatus 'Sensation White' | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, about every 7-10 days | Pet-safe |
| Cosmos sulphureus 'Bright Lights' | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, about every 7-10 days | Pet-safe |
| Cosmos sulphureus 'Klondike' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days once established | Pet-safe |
| Costa Rica Bamboo Palm | Bright indirect light (just back from a sunny window) | Every 7–10 days in summer, every 14 days in winter | Pet-safe |
| Costa Rica Pitaya | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days in summer; every 2-4 weeks in winter | Pet-safe |
| Costa Rican Goldfish Vine | Bright indirect light (just back from a sunny window) | Water when the top 2 cm of mix has dried; every 5–8 days in summer, every 10–14 days in winter | Pet-safe |
| Costa Rican Stanhopea | Bright indirect light (just back from a sunny window) | Every 3–5 days in growth; reduce to weekly in winter | Pet-safe |
| Cotton Candy Fern | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 4-7 days | Pet-safe |
| Cowslip Orchid | Bright indirect light (just back from a sunny window) | Lightly during autumn to spring growth; completely dry during summer dormancy | Pet-safe |
| Cramer's Amazon celosia | Direct sun (at least 4-6 hours) | Every 3–5 days | Pet-safe |
| Crataegus laevigata 'Paul's Scarlet' | Direct sun (at least 4-6 hours) | Water weekly for the first two seasons; established trees are very drought-tolerant | Pet-safe |
| Crataegus persimilis 'Prunifolia' | Direct sun (at least 4-6 hours) | Water weekly for the first two seasons; established trees are drought-tolerant | Pet-safe |
| Crater Argyroderma | Direct sun (at least 4-6 hours) | Every 3–5 weeks in the autumn–winter growing period; none from May through August | Pet-safe |
| Creeping Globe Daisy | Direct sun (at least 4-6 hours) | Every 2–3 weeks when actively growing; minimal in winter | Pet-safe |
| Creeping Little Bluestem | Direct sun (at least 4-6 hours) | Minimal once established; rainfall usually sufficient on native sites | Pet-safe |
| Creeping New Zealand Cranesbill | Direct sun (at least 4-6 hours) | Every 7–10 days in the growing season; minimal in winter | Pet-safe |
| Creeping Sage | Bright indirect light (just back from a sunny window) | Weekly during the growing season | Pet-safe |
| Creeping Speedwell | Bright indirect light (just back from a sunny window) | Moderate; water when the top 2–3 cm of soil begins to dry | Pet-safe |
| Crenate Orchid Cactus | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-14 days in the growing season; reduce to once every 3-4 weeks in winter | Pet-safe |
| Crested Alloplectus | Bright indirect light (just back from a sunny window) | Every 5–7 days; allow top 2 cm of medium to dry between waterings | Pet-safe |
| Crested Catasetum | Direct sun (at least 4-6 hours) | Daily to every-other-day during growth; stop during dormancy | Pet-safe |
| Crested Vanda | Bright indirect light (just back from a sunny window) | Daily to every other day in summer; every 3-5 days in winter | Pet-safe |
| Cretan Brake Fern | Bright indirect light (just back from a sunny window) | Keep evenly moist; water when the top third of the soil feels dry, roughly every 4-7 days in growth | Pet-safe |
| Cretan Date Palm | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 10-14 days in summer | Pet-safe |
| Crimean Linden | Bright indirect light (just back from a sunny window) | Weekly during establishment; every 2–3 weeks in dry summers once mature | Pet-safe |
| Crimson Portea | Bright indirect light (just back from a sunny window) | Weekly in growth; every 10–14 days in winter | Pet-safe |
| Crimson Water Lily | Direct sun (at least 4-6 hours) | Permanently aquatic — crown submerged 15–50 cm (6–20 in) below water surface | Pet-safe |
| Cross Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once a month or less in winter | Pet-safe |
| Cross-leaved heath | Direct sun (at least 4-6 hours) | Frequently — keep soil consistently moist to wet | Pet-safe |
| Cross-leaved Heath Alba Mollis | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water every 5–7 days in dry spells | Pet-safe |
| Crossandra (firecracker flower) | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil starts to dry, often every 4-7 days in growth | Pet-safe |
| Crown Bamboo | Bright indirect light (just back from a sunny window) | 2-3 times per week during growing season; weekly in cooler months | Pet-safe |
| Crown Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth; none from late autumn through winter | Pet-safe |
| Crown Staghorn Fern | Bright indirect light (just back from a sunny window) | Twice weekly in the growing season; once every 10–14 days in cooler months | Pet-safe |
| Crown Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in the growing season; every 2–3 weeks in winter | Pet-safe |
| Cryptanthus 'Black Mystic' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Cryptanthus 'Pink Starlight' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days | Pet-safe |
| Cryptanthus 'Ruby' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Cryptanthus acaulis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Cryptanthus bromelioides | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly weekly | Pet-safe |
| Cryptanthus fosterianus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Cryptanthus zonatus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Crystal Butterwort | Bright indirect light (just back from a sunny window) | Water lightly every 5–10 days during the carnivorous growing phase; allow to nearly dry between waterings in summer succulent-leaf phase | Pet-safe |
| Crystal White narrowleaf zinnia | Direct sun (at least 4-6 hours) | Every 5–7 days; drought tolerant once established | Pet-safe |
| Ctenanthe 'Amagris' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 5-7 days in growth | Pet-safe |
| Ctenanthe Compressa | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Ctenanthe Oppenheimiana 'Tricolor' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Ctenanthe Pilosa 'Golden Mosaic' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Ctenanthe Setosa 'Grey Star' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Cuban Cigar Calathea | Bright indirect light (just back from a sunny window) | Keep soil consistently moist; typically water when the top 2-3 cm feels dry | Pet-safe |
| Cuban Melon Cactus | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 10-14 days in summer and once every 3-4 weeks in winter | Pet-safe |
| Cuban Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Cuban Petticoat Palm | Direct sun (at least 4-6 hours) | When the top 5-8 cm of soil is dry, roughly every 10-14 days in summer; every 3-5 weeks in winter | Pet-safe |
| Cuban Royal Palm | Direct sun (at least 4-6 hours) | Every 5–7 days when young; established trees weekly or rely on rainfall | Pet-safe |
| Cucumber Tree Magnolia | Bright indirect light (just back from a sunny window) | Every 2–3 weeks when established; more frequently during active growth in summer | Pet-safe |
| Cup-Shaped Wittrockia | Bright indirect light (just back from a sunny window) | Keep the central tank filled; water the root medium when the top 2-3 cm is dry, roughly every 7-10 days | Pet-safe |
| Cupcake Miniature Rose | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 2-4 days in summer | Pet-safe |
| Cupcakes Blush cosmos | Direct sun (at least 4-6 hours) | Every 5–7 days; drought tolerant once established | Pet-safe |
| Cupid Peperomia | Bright indirect light (just back from a sunny window) | Roughly every 7-10 days in spring and summer, less in winter — always led by the soil, not the calendar. | Pet-safe |
| Curiosity Plant | Direct sun (at least 4-6 hours) | When the mix is dry, about every 2-3 weeks in summer; minimal in winter | Pet-safe |
| Curled Air Plant | Direct sun (at least 4-6 hours) | 2–4 times weekly in summer, weekly in winter | Pet-safe |
| Curly Oncidium | Bright indirect light (just back from a sunny window) | Every 5–7 days during growth; every 10–14 days during winter rest | Pet-safe |
| Curly Pondweed | Bright indirect light (just back from a sunny window) | Fully submerged; grows in 30 cm to 2 m of water | Pet-safe |
| Curly Racinaea | Bright indirect light (just back from a sunny window) | Mist thoroughly 3-4 times per week or submerge in water for 20 minutes twice weekly | Pet-safe |
| Curly Sentry Palm | Bright indirect light (just back from a sunny window) | Every 7–10 days in summer; every 14–21 days in winter | Pet-safe |
| Curly-Wurly Rush | Bright indirect light (just back from a sunny window) | Constant — keep roots standing in shallow water or in permanently wet soil | Pet-safe |
| Curved Peperomia | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (allow compost to dry between waterings) | Pet-safe |
| Cushion Aloe Haworthia | Bright indirect light (just back from a sunny window) | When soil is fully dry, about every 7-12 days in summer, much less in winter | Pet-safe |
| Cushion Draba | Direct sun (at least 4-6 hours) | Sparingly; soil must dry between waterings | Pet-safe |
| Cushion Sandwort | Direct sun (at least 4-6 hours) | Sparingly; allow to dry between waterings | Pet-safe |
| Cusp Blazing Star | Direct sun (at least 4-6 hours) | Every 2-3 weeks once established; avoid irrigation in winter | Pet-safe |
| Custard Biriba | Direct sun (at least 4-6 hours) | 2–3 times per week in growing season; reduce in cooler months | Pet-safe |
| Cut-Leaved Cranesbill | Direct sun (at least 4-6 hours) | Moderate; keep soil moist during spring and summer | Pet-safe |
| Cuthbertson's Dendrobium | Bright indirect light (just back from a sunny window) | When the medium surface begins to dry, roughly every 1-3 days | Pet-safe |
| Cutleaf coneflower | Direct sun (at least 4-6 hours) | Twice weekly during establishment; weekly or more in dry spells once established | Pet-safe |
| Cutleaf Fleabane | Direct sun (at least 4-6 hours) | Every 10–14 days during active growth; very little in winter | Pet-safe |
| Cyclops Staghorn Fern | Bright indirect light (just back from a sunny window) | Soak or thoroughly water the mount about once a week, more in heat, letting it approach dryness between soakings | Pet-safe |
| Cylindric Blazing Star | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; regular watering during establishment | Pet-safe |
| Cylindrical Rock Jasmine | Direct sun (at least 4-6 hours) | Very sparingly; almost none in winter | Pet-safe |
| Cymbidium 'Red Beauty' | Bright indirect light (just back from a sunny window) | Every 4-7 days in growth; every 10-14 days in winter | Pet-safe |
| Cymbidium 'Sarah Jean' | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth, about every 5-7 days, drier in winter | Pet-safe |
| Cymbidium 'Showgirl' | Bright indirect light (just back from a sunny window) | Every 4-7 days in growth; every 10-14 days in winter | Pet-safe |
| Cymbidium devonianum | Bright indirect light (just back from a sunny window) | Every 5-7 days in growth; reduce to every 10-14 days in winter | Pet-safe |
| Cymbidium erythrostylum | Bright indirect light (just back from a sunny window) | Every 5-7 days in growth; every 10-14 days in winter | Pet-safe |
| Cymbidium Golden Elf 'Sundust' | Bright indirect light (just back from a sunny window) | Every 4-7 days in growth; every 10-14 days in cooler months | Pet-safe |
| Cymbidium tracyanum | Bright indirect light (just back from a sunny window) | Every 3-6 days in growth; keep evenly moist in summer | Pet-safe |
| Cyperus Sedge | Bright indirect light (just back from a sunny window) | Permanently wet; shallow water up to 15 cm deep | Pet-safe |
| Dagger-Leaf Rush | Bright indirect light (just back from a sunny window) | Frequent to constant — soil must remain moist to wet at all times | Pet-safe |
| Dahurian Larch | Direct sun (at least 4-6 hours) | Weekly during establishment; minimal once established | Pet-safe |
| Dainty Bess Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly during growth | Pet-safe |
| Dalit Durian | Direct sun (at least 4-6 hours) | Daily to every other day in dry spells; less frequent during rainy seasons | Pet-safe |
| Dalmatian Cranesbill | Direct sun (at least 4-6 hours) | Every 7–10 days during the growing season; minimal in winter | Pet-safe |
| Dancing Lady Orchid | Bright indirect light (just back from a sunny window) | When the mix begins to dry, roughly every 4-6 days in growth | Pet-safe |
| Danica Globe Arborvitae | Bright indirect light (just back from a sunny window) | Moderate — keep soil evenly moist, especially in heat | Pet-safe |
| Darcey Bussell Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in growth; container plants more often | Pet-safe |
| Dark Beauty heather | Direct sun (at least 4-6 hours) | Weekly during the first season; as needed once established | Pet-safe |
| Dark Catasetum | Bright indirect light (just back from a sunny window) | Regularly during growth; reduced but not stopped in winter | Pet-safe |
| Dark Velvet Kohleria | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth; every 10–14 days in winter | Pet-safe |
| Darley Dale heath | Direct sun (at least 4-6 hours) | Weekly while establishing; every 2–3 weeks once established | Pet-safe |
| Darley Dale Heath Furzey | Direct sun (at least 4-6 hours) | Water weekly in dry spells; reduce in winter unless the soil is very dry | Pet-safe |
| Darwin's Orchid | Bright indirect light (just back from a sunny window) | When the roots show light silver colour and the medium is dry, roughly every 7-10 days in summer | Pet-safe |
| Daybreak Red Stripe Treasure Flower | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-14 days | Pet-safe |
| Dazzler cosmos | Direct sun (at least 4-6 hours) | Weekly until established; every 10–14 days once established | Pet-safe |
| Debbie Graptoveria | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer | Pet-safe |
| Deceptive Mammillaria | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 4-6 weeks in winter | Pet-safe |
| Deer Grass | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; monthly or less in cool months | Pet-safe |
| Delicate Air Plant | Bright indirect light (just back from a sunny window) | Soak for 20–30 minutes once a week | Pet-safe |
| Delta Pure White pansy | Bright indirect light (just back from a sunny window) | Every 2–3 days in warm weather; weekly in cool, wet conditions | Pet-safe |
| Delta Vygie | Direct sun (at least 4-6 hours) | When the soil is fully dry, approximately every 10-14 days in the growing season; very sparingly once a month in winter | Pet-safe |
| Dendrobium 'Berry Oda' | Bright indirect light (just back from a sunny window) | When the bark is nearly dry, roughly every 5-7 days in growth | Pet-safe |
| Dendrobium 'Emma White' | Bright indirect light (just back from a sunny window) | When the bark mix nears dry, roughly every 5-7 days in growth | Pet-safe |
| Dendrobium loddigesii | Bright indirect light (just back from a sunny window) | Frequently in growth, roughly every 4-6 days; sparingly through the winter rest | Pet-safe |
| Dendrobium orchid | Bright indirect light (just back from a sunny window) | When the bark approaches dryness, every 5-10 days in summer | Pet-safe |
| Dendrobium phalaenopsis | Bright indirect light (just back from a sunny window) | When the mix is approaching dry, roughly every 5-7 days in growth | Pet-safe |
| Dendrochilum cobbianum | Bright indirect light (just back from a sunny window) | 2-3 times per week, allowing only slight drying between waterings | Pet-safe |
| Dendrochilum filiforme | Bright indirect light (just back from a sunny window) | 2-3 times per week, letting the medium dry only slightly between waterings | Pet-safe |
| Dendrochilum glumaceum | Bright indirect light (just back from a sunny window) | 2-3 times per week, letting the medium dry only slightly between waterings | Pet-safe |
| Denison's Vanda | Bright indirect light (just back from a sunny window) | Abundant watering in active growth (spring–summer); reduce to light morning fogging every few days in winter | Pet-safe |
| Dense Trichodiadema | Direct sun (at least 4-6 hours) | Every 2–3 weeks during autumn and spring flowering seasons; reduced to monthly or less in summer and winter | Pet-safe |
| Dense-Leaf Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in summer, much less in winter | Pet-safe |
| Derby Sundew | Bright indirect light (just back from a sunny window) | Standing tray method (growing season); reduced to near-dry (rest) | Pet-safe |
| Desert Bromeliad | Direct sun (at least 4-6 hours) | every 14–21 days in summer, rarely in winter | Pet-safe |
| Deutzia 'Elegantissima' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days during the growing season | Pet-safe |
| Deutzia 'Nikko' | Direct sun (at least 4-6 hours) | Weekly in the first season; during dry spells once established | Pet-safe |
| Deutzia gracilis | Direct sun (at least 4-6 hours) | Weekly in the first year, then during dry spells | Pet-safe |
| Deutzia scabra 'Plena' | Direct sun (at least 4-6 hours) | Weekly while establishing, then in dry spells | Pet-safe |
| Deutzia x elegantissima 'Rosealind' | Direct sun (at least 4-6 hours) | Weekly while establishing, then during droughts | Pet-safe |
| DeVoss Codonanthe | Bright indirect light (just back from a sunny window) | Every 5–7 days; allow top 1–2 cm of medium to dry between waterings | Pet-safe |
| Diablo Orange Cosmos | Direct sun (at least 4-6 hours) | When the top 3–5 cm of soil is dry, roughly every 7–10 days | Pet-safe |
| Diaguita Air Plant | Direct sun (at least 4-6 hours) | Mist or dunk thoroughly 2–3 times per week in summer; every 7–10 days in winter. | Pet-safe |
| Diamond Maidenhair Fern | Bright indirect light (just back from a sunny window) | Every 3–4 days in the growing season; every 5–7 days in winter | Pet-safe |
| Diana Rose of Sharon | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 7-10 days in summer | Pet-safe |
| Diapensia-Like Saxifrage | Direct sun (at least 4-6 hours) | Very low — water sparingly in spring and summer; virtually none in winter | Pet-safe |
| Diascia 'Wink Coral Pink' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, roughly every 2-3 days in warm weather | Pet-safe |
| Diascia barberae 'Piccadilly' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, roughly every 2-3 days in warm weather | Pet-safe |
| Didier's Angraecum | Bright indirect light (just back from a sunny window) | 3–5 times per week in summer; reduce markedly in December–January after flowering | Pet-safe |
| Dinter's Eye Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks in autumn through late winter; none in summer | Pet-safe |
| Dinter's Living Stone | Direct sun (at least 4-6 hours) | Every 2-4 weeks in summer growing season; none during autumn-winter leaf renewal | Pet-safe |
| Dinteranthus microspermus | Direct sun (at least 4-6 hours) | Sparingly in late-summer through autumn growth; near-dry the rest of the year | Pet-safe |
| Dinteranthus pole-evansii | Direct sun (at least 4-6 hours) | Minimal, only during late-summer to autumn growth; dry otherwise | Pet-safe |
| Dinteranthus puberulus | Direct sun (at least 4-6 hours) | Lightly in late-summer to autumn growth; near-dry the rest of the year | Pet-safe |
| Dinteranthus vanzylii | Direct sun (at least 4-6 hours) | Sparingly during late-summer to autumn growth; dry otherwise | Pet-safe |
| Dionaea muscipula 'Akai Ryu' | Direct sun (at least 4-6 hours) | Keep permanently wet; stand in 1-2 cm of pure water while growing | Pet-safe |
| Dionaea muscipula 'B52' | Direct sun (at least 4-6 hours) | Keep permanently wet; stand in 1-2 cm of pure water in the growing season | Pet-safe |
| Dionaea muscipula 'Cupped Trap' | Direct sun (at least 4-6 hours) | Keep media constantly damp; sit in 1-2 cm of water in the growing season, less in dormancy | Pet-safe |
| Dionaea muscipula 'Dentate Traps' | Direct sun (at least 4-6 hours) | Keep constantly moist; tray-water with pure water | Pet-safe |
| Dionaea muscipula 'Red Dragon' | Direct sun (at least 4-6 hours) | Keep constantly moist; tray-water with pure water | Pet-safe |
| Disa tripetaloides | Bright indirect light (just back from a sunny window) | Keep permanently moist; water daily or stand in a tray of pure water | Pet-safe |
| Disa uniflora | Bright indirect light (just back from a sunny window) | Keep continuously moist; water daily or stand in a shallow tray of pure water | Pet-safe |
| Disc Cactus | Direct sun (at least 4-6 hours) | When the mix has been completely dry for a few days, roughly every 14-21 days in summer; almost no water from October to March | Pet-safe |
| Dischor Wax Plant | Bright indirect light (just back from a sunny window) | When the top half of the mix is dry, roughly every 7–12 days in summer | Pet-safe |
| Disk Staghorn Fern | Bright indirect light (just back from a sunny window) | Soak when the root mass is dry, roughly every 10-14 days | Pet-safe |
| Diversifolia Wax Plant | Bright indirect light (just back from a sunny window) | Roughly every 1-2 weeks in spring and summer; less in autumn and winter | Pet-safe |
| Dog Rose | Direct sun (at least 4-6 hours) | Weekly during the first growing season; rarely once established | Pet-safe |
| Dollbaby miniature gloxinia | Bright indirect light (just back from a sunny window) | Every 5–8 days; keep evenly moist but never waterlogged | Pet-safe |
| Don Juan Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season, more in heat | Pet-safe |
| Dorothy's Living Stone | Direct sun (at least 4-6 hours) | Every 2-3 weeks in summer (active growth); none from mid-autumn to late spring during rest | Pet-safe |
| Dorothy's Living Stones | Direct sun (at least 4-6 hours) | Seasonally — water only when the new leaf pair is actively growing (late summer to autumn); completely dry at all other times | Pet-safe |
| Dotted Blazing Star | Direct sun (at least 4-6 hours) | Every 3–4 weeks once established; moderate during first season | Pet-safe |
| Double Click Cranberries Cosmos | Direct sun (at least 4-6 hours) | When the top 3–5 cm of soil is dry, roughly every 7 days in summer | Pet-safe |
| Double Click Snow Puff cosmos | Direct sun (at least 4-6 hours) | Weekly once established; more frequent in heat | Pet-safe |
| Double Delight Rose | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week, more in heat | Pet-safe |
| Double Knock Out Rose | Direct sun (at least 4-6 hours) | About 2.5 cm weekly, deep watering | Pet-safe |
| Doublefile Viburnum 'Mariesii' | Direct sun (at least 4-6 hours) | Deep soak when the top 5 cm of soil dries, roughly weekly in the first two seasons | Pet-safe |
| Douglas's Sinningia | Bright indirect light (just back from a sunny window) | Allow top 2 cm to dry between waterings | Pet-safe |
| Dove's-Foot Cranesbill | Direct sun (at least 4-6 hours) | Low; water only during extended drought | Pet-safe |
| Downy Wax Plant | Bright indirect light (just back from a sunny window) | Every 10-14 days in active growth; every 14-21 days in autumn and winter | Pet-safe |
| Dragon's Blood Stonecrop | Direct sun (at least 4-6 hours) | When soil is dry, about every 10-14 days in summer; minimal in winter | Pet-safe |
| Dragon's tongue | Bright indirect light (just back from a sunny window) | When the top 2-3 cm is just dry, roughly every 5-9 days | Pet-safe |
| Drosera anglica | Direct sun (at least 4-6 hours) | Keep constantly saturated; stand in 1-3 cm of pure water through the growing season | Pet-safe |
| Drosera burmanni | Direct sun (at least 4-6 hours) | Keep media constantly wet; stand in 1-2 cm of pure water at all times in growth | Pet-safe |
| Drosera capensis 'Alba' | Bright indirect light (just back from a sunny window) | Keep constantly wet, standing the pot in 1-2 cm of water (tray method) at all times | Pet-safe |
| Drosera intermedia | Direct sun (at least 4-6 hours) | Keep permanently saturated; stand in 1-3 cm of pure water at all times during growth | Pet-safe |
| Drosera tokaiensis | Bright indirect light (just back from a sunny window) | Keep media constantly wet; stand in 1-2 cm of pure water at all times in growth | Pet-safe |
| Druce's Cranesbill | Bright indirect light (just back from a sunny window) | Water during establishment; once established largely drought-tolerant | Pet-safe |
| Drummond's Pitcher Plant | Direct sun (at least 4-6 hours) | Tray method year-round (reduced in dormancy) | Pet-safe |
| Dunn's cape primrose | Bright indirect light (just back from a sunny window) | Sparingly; allow soil to dry almost completely between waterings | Pet-safe |
| Durat's Air Plant | Bright indirect light (just back from a sunny window) | Mist thoroughly 2–3 times per week; a 20-minute soak once a week is sufficient in summer. Reduce to every 10–14 days in winter. | Pet-safe |
| Dutch Staghorn Fern | Bright indirect light (just back from a sunny window) | When the mount feels dry or the shield fronds are crisp, soak every 7-14 days in growing season | Pet-safe |
| Dwarf Alberta Spruce | Direct sun (at least 4-6 hours) | Every 5-7 days when establishing; deep soak when the top few cm of soil dry out | Pet-safe |
| Dwarf Antimima | Bright indirect light (just back from a sunny window) | Sparingly in summer; moderately in autumn–spring | Pet-safe |
| Dwarf Baby Tears | Direct sun (at least 4-6 hours) | Fully submerged — permanent aquatic plant | Pet-safe |
| Dwarf Bamboo | Bright indirect light (just back from a sunny window) | 2–3 times per week in summer, reduce in winter | Pet-safe |
| Dwarf Birch | Direct sun (at least 4-6 hours) | Regular moisture; do not allow to dry out, especially in summer | Pet-safe |
| Dwarf Blue Spruce | Direct sun (at least 4-6 hours) | Every 7-10 days when young; deep, infrequent watering once established | Pet-safe |
| Dwarf Cape Primrose | Bright indirect light (just back from a sunny window) | every 5–8 days in the growing season, every 10–14 days in winter | Pet-safe |
| Dwarf Caribbean gesneria | Bright indirect light (just back from a sunny window) | Every 4–7 days; do not allow to dry out | Pet-safe |
| Dwarf Cavendish Banana | Direct sun (at least 4-6 hours) | Keep evenly moist; water when the top 2-3 cm of soil is dry, often every 2-4 days in active growth | Pet-safe |
| Dwarf Cedar of Lebanon | Direct sun (at least 4-6 hours) | Weekly when young; bi-weekly once established | Pet-safe |
| Dwarf Chin Cactus | Bright indirect light (just back from a sunny window) | When soil is completely dry, roughly every 10-14 days in summer; once every 4-6 weeks in winter | Pet-safe |
| Dwarf Chirita | Bright indirect light (just back from a sunny window) | Every 7–10 days | Pet-safe |
| Dwarf Coast Redwood | Direct sun (at least 4-6 hours) | Every 1–2 weeks; more in summer heat | Pet-safe |
| Dwarf Fan Palm | Bright indirect light (just back from a sunny window) | Every 7–10 days during growing season; reduce to fortnightly in cooler months | Pet-safe |
| Dwarf Frailea | Bright indirect light (just back from a sunny window) | When the soil is completely dry, roughly every 12-16 days in summer | Pet-safe |
| Dwarf Greenstripe Bamboo | Bright indirect light (just back from a sunny window) | 2–3 times per week in summer, once per week in winter | Pet-safe |
| Dwarf Indigo Bush | Direct sun (at least 4-6 hours) | Establish with occasional deep watering for the first season; essentially no supplemental water needed once the taproot is developed | Pet-safe |
| Dwarf Jamaican Heliconia | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water when only the top 1-2 cm dries, roughly every 4-6 days | Pet-safe |
| Dwarf Korean Lilac | Direct sun (at least 4-6 hours) | Weekly while establishing, then every 1-2 weeks in dry spells | Pet-safe |
| Dwarf Lady's Mantle | Bright indirect light (just back from a sunny window) | Weekly during the growing season; established plants tolerate some drought | Pet-safe |
| Dwarf Lewisia | Direct sun (at least 4-6 hours) | Moderate during spring growth; completely dry in summer | Pet-safe |
| dwarf lipstick vine | Bright indirect light (just back from a sunny window) | Every 7–10 days; allow top 2–3 cm to dry before re-watering | Pet-safe |
| Dwarf Papyrus | Direct sun (at least 4-6 hours) | Keep roots permanently wet or in standing water 0–10 cm (0–4 in) deep | Pet-safe |
| Dwarf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Dwarf Rose-stripe Star | Bright indirect light (just back from a sunny window) | Water soil when top 2-3 cm dries out, roughly every 7-10 days | Pet-safe |
| Dwarf Sugar Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer; every 14 days in winter | Pet-safe |
| Dwarf Tongue Plant | Direct sun (at least 4-6 hours) | Every 3–4 weeks during the growing season; once a month or less in winter | Pet-safe |
| Dwarf Tree Fern | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Dwarf Vanda | Bright indirect light (just back from a sunny window) | Daily to every 2 days in active growth; every 3–4 days in winter | Pet-safe |
| Dwarf Whitestripe Bamboo | Bright indirect light (just back from a sunny window) | Consistently moist; water every 4–6 days during the growing season, reducing in autumn and winter | Pet-safe |
| Dwarf Windmill Palm | Direct sun (at least 4-6 hours) | Weekly while establishing; little supplemental water once mature | Pet-safe |
| Dyckia 'Cherry Cola' | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in growth, sparingly in winter | Pet-safe |
| Dyckia brevifolia | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth, far less in winter | Pet-safe |
| Dyckia fosteriana | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in growth, rarely in winter | Pet-safe |
| Dyckia marnier-lapostollei | Direct sun (at least 4-6 hours) | When the soil is bone dry, about every 10-14 days in summer, sparingly in winter | Pet-safe |
| Dyckia velascana | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in growth, minimal in winter | Pet-safe |
| Dyer's Ice Plant | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in growing season; reduce to monthly or less in winter | Pet-safe |
| Eared Abutilon | Bright indirect light (just back from a sunny window) | Every 5–7 days in growing season, every 10–14 days in winter | Pet-safe |
| Eared Sage | Bright indirect light (just back from a sunny window) | Weekly in summer, less in winter | Pet-safe |
| Early Bird goldfish plant | Bright indirect light (just back from a sunny window) | Water when the top third of the potting mix dries out — approximately every 7–10 days in the growing season, reducing to every 12–14 days in winter. | Pet-safe |
| Early Goldenrod | Direct sun (at least 4-6 hours) | Low to moderate — drought-tolerant once established | Pet-safe |
| Earth Star | Bright indirect light (just back from a sunny window) | Water when the top 2-3 cm of mix is dry, roughly every 5-7 days | Pet-safe |
| Earth-colored Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during the active autumn-to-spring period; none in summer | Pet-safe |
| East Himalayan Fir | Direct sun (at least 4-6 hours) | Regularly during establishment; drought-tolerant once mature | Pet-safe |
| Easter Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3cm of compost dries, roughly weekly in growth | Pet-safe |
| Easter Lily Cactus | Direct sun (at least 4-6 hours) | When the top of the soil dries, roughly weekly to fortnightly in summer; keep almost dry in winter | Pet-safe |
| Easter Lily Cactus Clump | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 10-14 days in summer | Pet-safe |
| Easter Orchid | Bright indirect light (just back from a sunny window) | When the bark dries, roughly every 5-7 days in growth | Pet-safe |
| Eastern Bee Balm | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days during the growing season | Pet-safe |
| Eaton's Firecracker | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; minimal winter irrigation | Pet-safe |
| Echeveria | Direct sun (at least 4-6 hours) | When the soil is bone dry, every 10-14 days in summer | Pet-safe |
| Echeveria 'Afterglow' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and every 3-4 weeks in winter | Pet-safe |
| Echeveria 'Blue Atoll' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria 'Chroma' | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in summer and much less in winter | Pet-safe |
| Echeveria 'Cubic Frost' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria 'Dondo' | Direct sun (at least 4-6 hours) | When the soil is fully dry, around every 10-14 days in summer, sparingly in winter | Pet-safe |
| Echeveria 'Duchess of Nürnberg' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria 'Ice Green' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer, far less in winter | Pet-safe |
| Echeveria 'Lola' | Bright indirect light (just back from a sunny window) | Every 2-3 weeks in the growing season; much less in winter | Pet-safe |
| Echeveria 'Lola' | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in summer | Pet-safe |
| Echeveria 'Meridian' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth, far less in winter | Pet-safe |
| Echeveria 'Minima' | Direct sun (at least 4-6 hours) | When the soil is completely dry, about every 1-2 weeks in summer | Pet-safe |
| Echeveria 'Mira' | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in summer and rarely in winter | Pet-safe |
| Echeveria 'Neon Breakers' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and every 3-4 weeks in winter | Pet-safe |
| Echeveria 'Orion' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer, far less in winter | Pet-safe |
| Echeveria 'Perle d'Azur' | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in summer, much less in winter | Pet-safe |
| Echeveria 'Perle von Nurnberg' | Direct sun (at least 4-6 hours) | Every 2-3 weeks in growth; less in winter | Pet-safe |
| Echeveria 'Perle von Nürnberg' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria 'Purple Pearl' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 1-3 weeks in growth and much less in winter | Pet-safe |
| Echeveria 'Raindrops' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria 'Tarantula' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer, much less in winter | Pet-safe |
| Echeveria 'Tsunami' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 1-2 weeks in summer | Pet-safe |
| Echeveria 'Violet Queen' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria agavoides | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and every 3-4 weeks in winter | Pet-safe |
| Echeveria agavoides 'Ebony' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and every 3-4 weeks in winter | Pet-safe |
| Echeveria colorata | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria gibbiflora | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria harmsii | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and every 3-4 weeks in winter | Pet-safe |
| Echeveria lilacina | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 2-3 weeks in growth and far less in winter | Pet-safe |
| Echeveria pallida | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in summer and much less in winter | Pet-safe |
| Echeveria pulidonis | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and every 3-4 weeks in winter | Pet-safe |
| Echeveria setosa | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and every 3-4 weeks in winter | Pet-safe |
| Echeveria shaviana | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Echeveria strictiflora | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer, sparingly in winter | Pet-safe |
| Echeveria subsessilis | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and monthly in winter | Pet-safe |
| Echeveria subsessilis 'Morning Beauty' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 1-2 weeks in summer | Pet-safe |
| Echidna Barrel Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, approximately every 14-21 days in the growing season | Pet-safe |
| Echinacea 'After Midnight' | Direct sun (at least 4-6 hours) | Once or twice weekly during establishment; once every 10–14 days when fully established | Pet-safe |
| Echinacea 'Baby White Swan' | Direct sun (at least 4-6 hours) | Once or twice a week in year one; once every 10–14 days when established | Pet-safe |
| Echinacea 'Cheyenne Spirit' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry; weekly while establishing, then mainly in drought | Pet-safe |
| Echinacea 'Coconut Lime' | Direct sun (at least 4-6 hours) | Once or twice a week in the first year; once a week or less when fully established | Pet-safe |
| Echinacea 'Harvest Moon' | Direct sun (at least 4-6 hours) | Every 7-10 days once established; weekly during the first season | Pet-safe |
| Echinacea 'Magnus' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, about weekly until established | Pet-safe |
| Echinacea 'Pink Double Delight' | Direct sun (at least 4-6 hours) | Every 7-10 days once established; more frequently during the first growing season | Pet-safe |
| Echinacea 'Pixie Meadowbrite' | Direct sun (at least 4-6 hours) | Once or twice a week during establishment; every 10–14 days when established | Pet-safe |
| Echinacea 'Ruby Star' | Direct sun (at least 4-6 hours) | Once or twice a week during the first growing season; deeply once a week or less when established | Pet-safe |
| Echinacea 'Tomato Soup' | Direct sun (at least 4-6 hours) | Once or twice a week during the first growing season; every 10–14 days once established | Pet-safe |
| Echinacea 'Virgin' | Direct sun (at least 4-6 hours) | Once or twice a week for the first growing season; once weekly to once every two weeks when established | Pet-safe |
| Echinacea 'White Swan' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, about weekly until established | Pet-safe |
| Echinocereus coccineus | Direct sun (at least 4-6 hours) | When soil is bone-dry in growth, roughly every 10-14 days; none over winter | Pet-safe |
| Echinocereus engelmannii | Direct sun (at least 4-6 hours) | When soil is fully dry in growing season, about every 10-14 days; keep dry in winter | Pet-safe |
| Echinocereus pectinatus | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 10-14 days in active growth; none in winter | Pet-safe |
| Echinocereus rigidissimus | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 12-16 days in growth; none in winter | Pet-safe |
| Echinops bannaticus 'Taplow Blue' | Direct sun (at least 4-6 hours) | Drought-tolerant once established; water new plants until settled | Pet-safe |
| Echinops ritro | Direct sun (at least 4-6 hours) | Drought-tolerant once established; water new plants until rooted | Pet-safe |
| Echinops ritro 'Veitch's Blue' | Direct sun (at least 4-6 hours) | Drought-tolerant once established; water young plants until rooted | Pet-safe |
| Echinopsis huascha | Direct sun (at least 4-6 hours) | Soak-and-dry; roughly every 10-14 days in active growth, none in winter | Pet-safe |
| Edelweiss | Direct sun (at least 4-6 hours) | Every 2–3 weeks; reduce to almost nothing in winter | Pet-safe |
| Eden Valley bell heather | Direct sun (at least 4-6 hours) | Weekly when establishing; every 2–3 weeks once established | Pet-safe |
| Edith's Air Plant | Direct sun (at least 4-6 hours) | Every 2–3 days by misting | Pet-safe |
| Egerton's Swan Orchid | Bright indirect light (just back from a sunny window) | Water generously every 3-5 days during active growth; reduce to once every 2-3 weeks once leaves drop and cease almost entirely in mid-winter rest | Pet-safe |
| Eglantyne Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly through the growing season, more in heat | Pet-safe |
| Egyptian White Water Lily | Direct sun (at least 4-6 hours) | Permanently submerged aquatic — maintain 22–40 cm of water over the crown | Pet-safe |
| Ehlers' Butterwort | Bright indirect light (just back from a sunny window) | Careful watering from below; drier in winter | Pet-safe |
| Eichhornia crassipes | Direct sun (at least 4-6 hours) | Free-floating on warm, still or slow water; keep the pond topped up | Pet-safe |
| Eitape Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Elegant Ball Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer; every 3-4 weeks in winter | Pet-safe |
| Elegant clarkia | Direct sun (at least 4-6 hours) | Every 7–14 days; drought-tolerant once established | Pet-safe |
| Elegant Turk's Cap | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer; reduce to every 3-4 weeks in winter | Pet-safe |
| Elephant bush | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is fully dry, roughly every 10-14 days in summer | Pet-safe |
| Elephant Ear Staghorn Fern | Bright indirect light (just back from a sunny window) | Soak when the mount is light and nearly dry, roughly every 5-9 days | Pet-safe |
| Elijah Blue Fescue | Direct sun (at least 4-6 hours) | Every 10–14 days (established); weekly when newly planted | Pet-safe |
| Elina Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the growing season; more in heat | Pet-safe |
| Elk Blue Rush | Bright indirect light (just back from a sunny window) | Frequent to constant — keep soil consistently moist or wet | Pet-safe |
| Elk's Horn Fern | Bright indirect light (just back from a sunny window) | Soak when the mount feels light and dry, roughly every 5-10 days | Pet-safe |
| elongate sun pitcher | Bright indirect light (just back from a sunny window) | Daily; keep media permanently moist | Pet-safe |
| Emerald Blue Creeping Phlox | Direct sun (at least 4-6 hours) | Every 7–10 days during the growing season; drought-tolerant once established (second year onward) | Pet-safe |
| Emerald Ripple Peperomia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, about every 7-14 days in growth and far less in winter | Pet-safe |
| Encrusted Saxifrage | Direct sun (at least 4-6 hours) | Every 10–14 days in the growing season; rarely in winter | Pet-safe |
| Encyclia cochleata | Bright indirect light (just back from a sunny window) | Water about weekly, letting the medium approach dryness between drinks | Pet-safe |
| Encyclia cordigera | Bright indirect light (just back from a sunny window) | Water roughly weekly in summer growth; reduce to occasional during the cooler winter rest | Pet-safe |
| Encyclia tampensis | Bright indirect light (just back from a sunny window) | When roots and medium are nearly dry, about every 3-5 days in growth | Pet-safe |
| Engelmann Spruce | Direct sun (at least 4-6 hours) | Regular — keep soil consistently moist, especially in the first 3 years after planting | Pet-safe |
| Engraved Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks from late summer through autumn (active growth); withheld or near-zero from May through August | Pet-safe |
| Entire-Lipped Catasetum | Bright indirect light (just back from a sunny window) | Abundantly during active growth (spring–autumn); near-dry during winter dormancy | Pet-safe |
| Envy Green Zinnia | Direct sun (at least 4-6 hours) | When the top 2–4 cm of soil feels dry, roughly every 5–7 days | Pet-safe |
| Epidendrum ibaguense | Direct sun (at least 4-6 hours) | When the top of the medium feels nearly dry, roughly every 4-6 days in growth | Pet-safe |
| Epidendrum porpax | Bright indirect light (just back from a sunny window) | Keep evenly, lightly moist year-round; mist or water mounts daily to every few days | Pet-safe |
| Epidendrum secundum | Direct sun (at least 4-6 hours) | Water about weekly, keeping the medium lightly moist; let the surface dry between waterings | Pet-safe |
| Episcia 'Cleopatra' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil begins to dry, roughly every 5-7 days | Pet-safe |
| Episcia 'Moss Agate' | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Episcia 'Pink Acajou' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, about every 5-7 days | Pet-safe |
| Episcia 'Silver Skies' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, about every 5-7 days | Pet-safe |
| Episcia cupreata 'Silver Sheen' | Bright indirect light (just back from a sunny window) | Water when the top 1-2 cm of soil is dry, about every 5-7 days | Pet-safe |
| Episcia lilacina | Bright indirect light (just back from a sunny window) | Water when the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Episcia reptans | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Erman's Birch | Direct sun (at least 4-6 hours) | Regular watering for first 2–3 years; occasional once established | Pet-safe |
| Ernest's Turk's Cap | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-10 days during summer; reduce to once every 3-4 weeks in winter | Pet-safe |
| Espostoa lanata | Direct sun (at least 4-6 hours) | When the top few centimetres are dry, about every 2 weeks in summer; sparingly in winter | Pet-safe |
| Espostoa melanostele | Direct sun (at least 4-6 hours) | When the upper soil is dry, about every 2 weeks in summer; sparingly in winter | Pet-safe |
| Etched Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks during the autumn–spring growing period; completely dry through June–August | Pet-safe |
| Eternal Flame Plant | Bright indirect light (just back from a sunny window) | Roughly weekly in spring and summer; every 10-14 days in winter | Pet-safe |
| Ethiopian Banana | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water every 4-6 days during warm months | Pet-safe |
| European Ash | Direct sun (at least 4-6 hours) | Moderate; deep watering during drought in first 3 years | Pet-safe |
| European feather grass | Direct sun (at least 4-6 hours) | Weekly in the first growing season; only during extreme drought thereafter | Pet-safe |
| Europeana Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly | Pet-safe |
| Even-stamen Columnea | Bright indirect light (just back from a sunny window) | When top 2–3 cm of mix dries | Pet-safe |
| evergreen miscanthus | Direct sun (at least 4-6 hours) | Every 7–14 days during the growing season; reduce but do not cease in mild winters | Pet-safe |
| Everlasting Sweet Pea | Direct sun (at least 4-6 hours) | Weekly while establishing; drought-tolerant once mature | Pet-safe |
| Excellent Pitcher Plant | Direct sun (at least 4-6 hours) | Keep in a standing tray of 2–5 cm (1–2 in) of pure water at all times during the growing season; reduce in winter dormancy | Pet-safe |
| Extended Alcantarea | Bright indirect light (just back from a sunny window) | Every 1–2 weeks in summer; every 3–4 weeks in winter | Pet-safe |
| Eyelash Sage | Bright indirect light (just back from a sunny window) | Every 7-10 days once established | Pet-safe |
| Fairies' Thimbles | Bright indirect light (just back from a sunny window) | Weekly during active growth; less in winter | Pet-safe |
| fairy aprons | Bright indirect light (just back from a sunny window) | Keep media constantly wet; use the tray method year-round | Pet-safe |
| Fairy fan-flower | Direct sun (at least 4-6 hours) | Every 3–5 days in containers; every 7–10 days in-ground once established | Pet-safe |
| Falconer's Sundew | Bright indirect light (just back from a sunny window) | Deep tray (growing season); very reduced (rest) | Pet-safe |
| False Aralia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm is dry, roughly every 7-10 days in growth | Pet-safe |
| False Comb Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer and essentially none in winter | Pet-safe |
| False Pereskia Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring and summer; reduce to every 3–4 weeks in winter | Pet-safe |
| False Peyote | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 14-21 days in summer; minimal or none in winter | Pet-safe |
| Falstaff Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season; more in heat or sandy soil | Pet-safe |
| Fama White scabiosa | Direct sun (at least 4-6 hours) | Every 7–10 days; less in winter | Pet-safe |
| Fan Air Plant | Bright indirect light (just back from a sunny window) | Mist 2–3 times per week, or a 15–20 minute soak once a week | Pet-safe |
| Farewell-to-spring | Direct sun (at least 4-6 hours) | Every 7–10 days; reduce once established | Pet-safe |
| Fascinator Zebra Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth; reduce when flowering | Pet-safe |
| Feather Cactus | Bright indirect light (just back from a sunny window) | Every 2-3 weeks in spring/summer; keep nearly dry in winter | Pet-safe |
| feather grass | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; minimal in winter | Pet-safe |
| feathertop grass | Direct sun (at least 4-6 hours) | Weekly when establishing; every 2 weeks once established | Pet-safe |
| Feathery Air Plant | Bright indirect light (just back from a sunny window) | Mist lightly every 2–3 days in warm conditions; reduce to every 4–5 days in cooler weather. | Pet-safe |
| Feelin' Blue Deodar Cedar | Direct sun (at least 4-6 hours) | Weekly when young; monthly once established | Pet-safe |
| Felicia Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly during the growing season, more often in hot weather | Pet-safe |
| Female Bamboo | Direct sun (at least 4-6 hours) | 2-3 times per week in growing season; reduce significantly in dry or cooler periods | Pet-safe |
| Fennel-Leaved Sea Lavender | Direct sun (at least 4-6 hours) | Low to moderate — water to establish, then sparingly | Pet-safe |
| Ferocactus glaucescens | Direct sun (at least 4-6 hours) | Soak-and-dry, roughly every 14 days in summer; keep dry in winter | Pet-safe |
| Ferocactus latispinus | Direct sun (at least 4-6 hours) | Soak-and-dry, roughly every 14 days in summer; keep dry in winter | Pet-safe |
| Ferocactus schwarzii | Direct sun (at least 4-6 hours) | Soak-and-dry, roughly every 10-14 days in summer; keep dry in winter | Pet-safe |
| Few-flowered Abutilon | Bright indirect light (just back from a sunny window) | Every 7–10 days in active growth; fortnightly in cooler months | Pet-safe |
| Few-flowered Neoregelia | Bright indirect light (just back from a sunny window) | Keep the central cup topped with water; allow potting medium or mount to dry slightly between waterings | Pet-safe |
| Few-Flowered Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in growing season; reduce to every 3–4 weeks in winter | Pet-safe |
| Few-Ribbed Matucana | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, every 7-14 days in summer | Pet-safe |
| Few-Toothed Tiger Jaws | Direct sun (at least 4-6 hours) | Every 2–4 weeks during active growth (late summer–autumn); sparingly in winter and spring | Pet-safe |
| Fida's Weingartia | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in spring and summer; suspend almost entirely from mid-autumn through winter. | Pet-safe |
| Fiebrig's Crown Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 7-10 days in spring and summer; every 4-6 weeks in autumn; minimal to none in winter | Pet-safe |
| Field Chickweed | Direct sun (at least 4-6 hours) | Every 7–14 days in the growing season; very sparingly in autumn and winter | Pet-safe |
| Field marigold | Direct sun (at least 4-6 hours) | Weekly during dry spells; self-sufficient once established | Pet-safe |
| Field Quesnelia | Bright indirect light (just back from a sunny window) | Tank every 7 days; soil every 10–14 days | Pet-safe |
| Field Sage | Direct sun (at least 4-6 hours) | Every 10-14 days once established; minimal in winter | Pet-safe |
| Field Wood Rush | Direct sun (at least 4-6 hours) | No supplemental watering needed in typical temperate climates; relies on natural rainfall | Pet-safe |
| Fiery Masdevallia | Bright indirect light (just back from a sunny window) | Daily in warm weather; every 3–5 days in cool/winter months | Pet-safe |
| Fine-lined Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days in autumn to early spring only; completely withheld in summer and mid-winter | Pet-safe |
| Finger Cactus | Direct sun (at least 4-6 hours) | When the soil has dried fully, roughly every 2-3 weeks in summer; keep dry in winter | Pet-safe |
| Fingertips | Bright indirect light (just back from a sunny window) | Every 2–3 weeks autumn through spring; minimal to none in summer | Pet-safe |
| Finlaysonii Wax Plant | Bright indirect light (just back from a sunny window) | Every 1-2 weeks; let the top half of the mix dry out first | Pet-safe |
| Fire Crown Cactus | Direct sun (at least 4-6 hours) | When the mix is completely dry, about every 10-14 days in growth; withhold entirely in winter | Pet-safe |
| Fire Flash Spider Plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer | Pet-safe |
| Fire Star Orchid | Direct sun (at least 4-6 hours) | When the top 2-3 cm of the mix is dry, roughly every 5-7 days | Pet-safe |
| Firecracker plant | Bright indirect light (just back from a sunny window) | Every 4–7 days; never allow soil to dry fully | Pet-safe |
| Firefly heather | Direct sun (at least 4-6 hours) | Weekly during establishment; occasional deep watering once established | Pet-safe |
| Fireworks Globe Amaranth | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Fischer's Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Fishbone Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Fishhook Barrel | Direct sun (at least 4-6 hours) | When fully dry, about every 10-14 days in summer; keep dry in winter | Pet-safe |
| Fishhook Barrel Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 2-3 weeks in summer; little to none from late autumn through winter | Pet-safe |
| Fishhook Barrel Cactus | Direct sun (at least 4-6 hours) | When the soil is bone dry, every 10-14 days in summer; once every 4-6 weeks in winter | Pet-safe |
| Fittonia albivenis 'Juanita' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil begins to dry, often every 3-5 days | Pet-safe |
| Fittonia albivenis 'Red Anne' | Bright indirect light (just back from a sunny window) | When the top 1 cm of soil starts to dry, often every 3-5 days | Pet-safe |
| Fitzgerald's Sarcochilus | Bright indirect light (just back from a sunny window) | Every 3-5 days during the growing season; every 7-10 days in cooler months | Pet-safe |
| Five-Nerved Wax Plant | Bright indirect light (just back from a sunny window) | Every 7-14 days during active growth; every 14-21 days in winter | Pet-safe |
| Flag Pansy Orchid | Bright indirect light (just back from a sunny window) | When the medium is nearly dry, roughly every 5-7 days in summer | Pet-safe |
| Flag-bearer Dendrobium | Bright indirect light (just back from a sunny window) | When medium begins to dry, approximately every 2-4 days in active growth | Pet-safe |
| Flame nasturtium | Bright indirect light (just back from a sunny window) | Water regularly to maintain consistent moisture, especially in spring and summer | Pet-safe |
| Flame violet | Bright indirect light (just back from a sunny window) | Roughly once or twice a week; keep the mix lightly, evenly moist | Pet-safe |
| Flame Violet | Bright indirect light (just back from a sunny window) | When the top 1–2 cm of soil is dry | Pet-safe |
| Flaming Sword Bromeliad | Bright indirect light (just back from a sunny window) | Refill cup every 5–7 days; flush monthly | Pet-safe |
| Flamingo Feather Celosia | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 6-8 days | Pet-safe |
| Flanagan's Sage | Direct sun (at least 4-6 hours) | Every 10-14 days during the growing season; rarely in winter | Pet-safe |
| Flandria Blushing Bromeliad | Bright indirect light (just back from a sunny window) | Refresh central cup weekly; water soil every 2–3 weeks | Pet-safe |
| Flat Sea Holly | Direct sun (at least 4-6 hours) | Low — water occasionally during the first growing season, then minimal | Pet-safe |
| Flat-Leaf Wax Plant | Bright indirect light (just back from a sunny window) | Every 7-14 days in spring and summer; reduce to every 14-21 days in winter | Pet-safe |
| Flat-Leaved Dyckia | Direct sun (at least 4-6 hours) | When the compost is completely dry, roughly every 14-21 days in summer | Pet-safe |
| Flat-Leaved Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks in growing season; minimal in winter | Pet-safe |
| Flat-Stem Wax Plant | Bright indirect light (just back from a sunny window) | Every 10-14 days in active growth; less frequently in winter | Pet-safe |
| Flesh-coloured Habenaria | Bright indirect light (just back from a sunny window) | Every 3-5 days during active growth; completely dry during dormancy | Pet-safe |
| Flexuous Dancing Lady | Bright indirect light (just back from a sunny window) | When the top of the bark mix is dry, approximately every 7 days in summer and every 10-14 days in winter | Pet-safe |
| Flexuous Oncidium | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 10–14 days in winter rest | Pet-safe |
| Floating Bur-reed | Direct sun (at least 4-6 hours) | Fully aquatic; floating or lightly rooted in 10–80 cm of water | Pet-safe |
| Florida Columnea | Bright indirect light (just back from a sunny window) | When top 2–3 cm of mix dries | Pet-safe |
| Florida Silver Palm | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, roughly every 10-14 days in summer | Pet-safe |
| Florist's Gloxinia | Bright indirect light (just back from a sunny window) | Keep evenly moist during active growth; typically water once the top of the mix begins to dry, then taper off completely heading into dormancy. | Pet-safe |
| Flower Carpet Rose | Direct sun (at least 4-6 hours) | Deeply once a week in the growing season; more in containers or heat | Pet-safe |
| Flowering Banana | Direct sun (at least 4-6 hours) | When the top 3 cm of soil is dry, roughly every 5-7 days in growing season | Pet-safe |
| Flowering Dogwood 'Cherokee Chief' | Bright indirect light (just back from a sunny window) | Weekly deep watering, more in drought | Pet-safe |
| Fly Bush | Direct sun (at least 4-6 hours) | Keep substrate consistently moist but not waterlogged; water every 2–4 days depending on conditions | Pet-safe |
| Flying Saucer Cactus | Direct sun (at least 4-6 hours) | When the top of the soil is dry, roughly weekly to fortnightly in summer; keep nearly dry in winter | Pet-safe |
| Forsythia 'Lynwood Gold' | Direct sun (at least 4-6 hours) | Weekly while establishing, then only in extended dry spells | Pet-safe |
| Forsythia 'Show Off' | Direct sun (at least 4-6 hours) | Weekly to establish, then mainly during dry spells | Pet-safe |
| Forsythia Sage | Bright indirect light (just back from a sunny window) | Weekly during active growth | Pet-safe |
| Foster's Canistrum | Bright indirect light (just back from a sunny window) | Keep the central tank filled; flush and refill every 1-2 weeks to prevent stagnation | Pet-safe |
| Foster's Neoregelia | Bright indirect light (just back from a sunny window) | Refill the central cup every 5-7 days; water the medium when the top 2-3 cm is dry, roughly every 10-14 days | Pet-safe |
| Four-angled cassiope | Bright indirect light (just back from a sunny window) | Regularly during the growing season; keep consistently moist but never waterlogged | Pet-safe |
| Four-Flowered Racinaea | Bright indirect light (just back from a sunny window) | Mist foliage thoroughly 3-4 times per week; soak weekly in warm water for 15-30 minutes | Pet-safe |
| Four-Leaf Water Clover | Bright indirect light (just back from a sunny window) | Aquatic — grows in shallow water or moist substrate permanently | Pet-safe |
| Four-stamen Tamarisk | Direct sun (at least 4-6 hours) | Moderate to low; drought-tolerant once established | Pet-safe |
| Fourth of July Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season, more during heat | Pet-safe |
| Foxtail Orchid | Bright indirect light (just back from a sunny window) | When the bark approaches dryness, typically every 7-10 days | Pet-safe |
| Fragrans Maidenhair Fern | Bright indirect light (just back from a sunny window) | Keep evenly moist at all times, often every 2-4 days | Pet-safe |
| Fragrant Maidenhair Fern | Bright indirect light (just back from a sunny window) | When the surface just begins to dry, roughly every 3-5 days | Pet-safe |
| Fragrant Stanhopea | Bright indirect light (just back from a sunny window) | Daily or near-daily during active growth; reduce to every 2–3 days in winter | Pet-safe |
| Fragrant Stomatium | Bright indirect light (just back from a sunny window) | Sparingly in summer; every 2–3 weeks in autumn–spring | Pet-safe |
| Fragrant White Water Lily | Direct sun (at least 4-6 hours) | Permanently submerged aquatic — maintain water depth of 30–60 cm over the crown | Pet-safe |
| Franz's Living Stone | Direct sun (at least 4-6 hours) | Every 2-4 weeks in the summer growing season; completely dry from mid-autumn to late spring | Pet-safe |
| Frau Dagmar Hartopp Rose | Direct sun (at least 4-6 hours) | Weekly while establishing; drought-tolerant once settled | Pet-safe |
| Fred Ives | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring/summer; every 3–4 weeks in winter | Pet-safe |
| Free-Flowering Cymbidium | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; every 10 days in winter | Pet-safe |
| Free-flowering Streptocarpus | Bright indirect light (just back from a sunny window) | Water when the top 1 cm of compost feels dry; roughly every 5–7 days in summer, less frequently in winter. | Pet-safe |
| Freesia | Direct sun (at least 4-6 hours) | Keep evenly moist while in growth; reduce to nothing once foliage yellows after flowering | Pet-safe |
| Freesia 'Pink Marble' | Direct sun (at least 4-6 hours) | Water regularly once shoots appear, roughly every 4-7 days, keeping soil moist but not wet | Pet-safe |
| Freesia 'Royal Blue' | Direct sun (at least 4-6 hours) | Water every 4-7 days during active growth, keeping the soil evenly moist but never waterlogged | Pet-safe |
| Freesia 'Yellow Passion' | Direct sun (at least 4-6 hours) | Water every 4-7 days while in growth, keeping soil moist but not soggy | Pet-safe |
| Freesia refracta | Direct sun (at least 4-6 hours) | Water every 5-7 days during winter-spring growth, keeping the soil just moist | Pet-safe |
| French Tamarisk | Direct sun (at least 4-6 hours) | Moderate; drought-tolerant once established | Pet-safe |
| Fresh Look Red Cockscomb | Direct sun (at least 4-6 hours) | When the top 2–3 cm of soil is dry, roughly every 5–7 days | Pet-safe |
| Friedrich's Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks in autumn; none during summer dormancy | Pet-safe |
| Friedrichsthals Copper Leaf | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; minimal in dormancy | Pet-safe |
| Friendship Plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-9 days | Pet-safe |
| Fringed Cliff Stonecrop | Direct sun (at least 4-6 hours) | Every 14–21 days in the growing season; minimal in winter | Pet-safe |
| Fringed Coreopsis | Direct sun (at least 4-6 hours) | Every 1–2 weeks once established; more frequently when young | Pet-safe |
| Fringed Houseleek | Direct sun (at least 4-6 hours) | Low — water sparingly, allowing soil to dry fully | Pet-safe |
| Fringed Star Orchid | Bright indirect light (just back from a sunny window) | Every 4–7 days in active growth; every 7–10 days in winter | Pet-safe |
| Fringed Star Orchid | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of the mix feels dry, roughly every 7-10 days | Pet-safe |
| Frithia humilis | Direct sun (at least 4-6 hours) | When soil is fully dry during spring-summer growth; minimal in winter | Pet-safe |
| Frithia pulchra | Direct sun (at least 4-6 hours) | When soil is fully dry during spring-summer growth; sparing in winter | Pet-safe |
| Fritsch's Goldfish Plant | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry | Pet-safe |
| Fritschs Pouch Flower | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; reduce in winter to every 10–14 days | Pet-safe |
| Front Range Beardtongue | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; minimal in winter | Pet-safe |
| Frosted Curls Sedge | Bright indirect light (just back from a sunny window) | Weekly, or when top 2-3 cm of soil is dry | Pet-safe |
| Frosty Fern | Bright indirect light (just back from a sunny window) | Keep evenly moist; water when the surface just begins to dry, often 2-3 times per week | Pet-safe |
| Fruit-scented Sage | Direct sun (at least 4-6 hours) | When the top 3-5 cm of compost is dry — roughly every 5-8 days in summer, less often in winter | Pet-safe |
| Fuchsia | Bright indirect light (just back from a sunny window) | When the top 1-2 inches of soil feel dry (often every few days in summer) | Pet-safe |
| Fuchsia 'Alice Hoffman' | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil or compost are dry, roughly every 7-10 days | Pet-safe |
| Fuchsia 'Annabel' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost are dry, roughly every 5-7 days in summer | Pet-safe |
| Fuchsia 'Beacon' | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil or compost are dry, roughly every 7-10 days in summer | Pet-safe |
| Fuchsia 'Brutus' | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil or compost are dry, roughly every 7-10 days | Pet-safe |
| Fuchsia 'Cardinal Farges' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil are dry, roughly every 8-12 days when established | Pet-safe |
| Fuchsia 'Dollar Princess' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost feels dry, roughly every 5-7 days in summer | Pet-safe |
| Fuchsia 'Gartenmeister Bonstedt' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 3-5 days in warm weather | Pet-safe |
| Fuchsia 'Golden Marinka' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost is dry, roughly every 5-7 days in summer | Pet-safe |
| Fuchsia 'Lady Thumb' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost is dry, roughly every 5-7 days in active growth | Pet-safe |
| Fuchsia 'Marinka' | Bright indirect light (just back from a sunny window) | When the top 2 cm of compost are dry, roughly every 5-7 days; daily checks in hot weather | Pet-safe |
| Fuchsia 'Mrs Popple' | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil or compost is dry, roughly every 3-5 days during active growth | Pet-safe |
| Fuchsia 'Pink Marshmallow' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost feel dry, roughly every 5-7 days; more frequently in summer heat | Pet-safe |
| Fuchsia 'Red Spider' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost are dry, roughly every 5-7 days in summer | Pet-safe |
| Fuchsia 'Swingtime' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of compost is dry, roughly every 2-3 days in warm weather | Pet-safe |
| Fuchsia 'Thalia' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 3-5 days in warm weather | Pet-safe |
| Fuchsia 'Tom Thumb' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil or compost feels dry, roughly every 5-8 days | Pet-safe |
| Fuchsia 'Voodoo' | Bright indirect light (just back from a sunny window) | When the top 2 cm of compost are dry, roughly every 5-7 days in summer | Pet-safe |
| Fuchsia 'Winston Churchill' | Bright indirect light (just back from a sunny window) | When the top 2 cm of compost are dry, roughly every 6-8 days | Pet-safe |
| Fuchsia magellanica | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 3-5 days in summer heat | Pet-safe |
| Full Moon Maple | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly weekly in summer | Pet-safe |
| Fuller's Living Stone | Direct sun (at least 4-6 hours) | Only when the old lobe pair is fully shrivelled (summer dormancy) and during the active growing window autumn–spring; roughly every 14-21 days when active | Pet-safe |
| Fuller's Titanopsis | Direct sun (at least 4-6 hours) | Every 3–4 weeks in autumn/winter growing season; minimal in summer dormancy | Pet-safe |
| Fuller's Titanopsis | Direct sun (at least 4-6 hours) | Every 2–3 weeks during autumn to early spring; barely once a month in summer dormancy | Pet-safe |
| Furuse's Orostachys | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; minimal watering in winter | Pet-safe |
| Furzey Darley Dale heath | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks once established | Pet-safe |
| Fused Tooth Venus flytrap | Direct sun (at least 4-6 hours) | Continuously moist via tray method during growing season; damp only in dormancy | Pet-safe |
| Garden Cape Primrose | Bright indirect light (just back from a sunny window) | Every 7-10 days in active growth; reduce to every 3-4 weeks in winter | Pet-safe |
| Garden Phlox 'David' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, about every 5-7 days | Pet-safe |
| Gasteria Acinacifolia | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Gasteria Armstrongii | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Gasteria Batesiana | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Gasteria Glomerata | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Gasteria Nitida | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Gasteria Obliqua | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Gasteria Pillansii | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 3 weeks in growth | Pet-safe |
| Gasteria Pulchra | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Gasteria Rawlinsonii | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Gaura 'Siskiyou Pink' | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 7-14 days during the growing season | Pet-safe |
| Gay's Pondweed | Bright indirect light (just back from a sunny window) | Permanently submerged aquatic plant | Pet-safe |
| Gentian Sage | Direct sun (at least 4-6 hours) | Moderate; water when the top 2–3 cm of soil dries out | Pet-safe |
| Gentian Speedwell | Bright indirect light (just back from a sunny window) | Once a week in dry conditions; the plant tolerates moderate drought once established | Pet-safe |
| Gentle Hermione Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week during the growing season; more in heat | Pet-safe |
| Georgia Blue Speedwell | Direct sun (at least 4-6 hours) | Moderate; water when the top 2–3 cm of soil dries out | Pet-safe |
| Geranium 'Johnson's Blue' | Direct sun (at least 4-6 hours) | Water to establish in the first season; thereafter when the top few cm of soil is dry, roughly weekly in dry spells | Pet-safe |
| Gerbera Daisy | Bright indirect light (just back from a sunny window) | When the top 2-3 cm (1 in) of soil is dry, roughly 1-2 times per week in active growth | Pet-safe |
| German Empress Orchid Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm is dry, roughly every 7-10 days in growth | Pet-safe |
| Germinyan's Angraecum | Bright indirect light (just back from a sunny window) | Every 4–6 days year-round; slight reduction in cooler months | Pet-safe |
| Gertrude Jekyll Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season; more in heat or sandy soil | Pet-safe |
| Gesine's Living Stone | Direct sun (at least 4-6 hours) | Approximately every 14-21 days during the autumn-spring active period only; none in summer dormancy | Pet-safe |
| Gesneria-flowered Sage | Direct sun (at least 4-6 hours) | Regular during the growing season | Pet-safe |
| Geyer's Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during active growth (autumn to early spring); none in summer | Pet-safe |
| Ghost Plant | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer and monthly or less in winter | Pet-safe |
| Giant Arrowhead | Direct sun (at least 4-6 hours) | Permanently aquatic — plant in still or slow-moving water 10–15 cm (4–6 in) deep; tolerates up to 30 cm (12 in). | Pet-safe |
| Giant Bamboo | Direct sun (at least 4-6 hours) | Frequently; requires abundant moisture year-round | Pet-safe |
| Giant Chalk Dudleya | Direct sun (at least 4-6 hours) | Every 3–4 weeks in summer, monthly or less in winter | Pet-safe |
| Giant Chin Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 7-14 days in summer; every 4-6 weeks in winter | Pet-safe |
| Giant Cymbidium | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce in winter rest | Pet-safe |
| Giant Dogwood | Bright indirect light (just back from a sunny window) | Weekly deep watering for young trees; deep watering in droughts for mature specimens | Pet-safe |
| Giant Ginger Lily | Direct sun (at least 4-6 hours) | Generously during active growth; reduce markedly in autumn and winter | Pet-safe |
| Giant Phragmipedium | Bright indirect light (just back from a sunny window) | Keep consistently moist — water when the surface of the medium is barely dry | Pet-safe |
| Giant Rainbow Plant | Direct sun (at least 4-6 hours) | Water freely in the wet season (winter/spring); drastically reduce and allow near-drying in summer | Pet-safe |
| Giant Sacaton | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; more frequent during establishment | Pet-safe |
| Giant Sea Holly | Direct sun (at least 4-6 hours) | Moderate — water regularly to keep soil evenly moist, especially in summer | Pet-safe |
| Giant Snowflake Bacopa | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of potting mix feels dry, roughly every 3-5 days in warm weather | Pet-safe |
| Giant South American Bamboo | Bright indirect light (just back from a sunny window) | Weekly to twice weekly during active growth; reduce in winter | Pet-safe |
| Giant Staghorn Fern | Bright indirect light (just back from a sunny window) | Soak when the mount or root mass is approaching dry, roughly every 7-14 days | Pet-safe |
| Giant Thorny Bamboo | Direct sun (at least 4-6 hours) | 2-3 times per week during the growing season; reduce in the dry season | Pet-safe |
| Giant Timber Bamboo | Direct sun (at least 4-6 hours) | Deeply 2-3 times per week; more frequently in hot weather or during shooting season | Pet-safe |
| Giant Vriesea | Bright indirect light (just back from a sunny window) | Flush cup weekly; water medium every 2 weeks | Pet-safe |
| Giant Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Giant Wild Pine | Bright indirect light (just back from a sunny window) | Weekly soak or twice-weekly misting | Pet-safe |
| Gireoud's Brassia | Bright indirect light (just back from a sunny window) | Every 3–4 days during active growth; reduce to weekly or less in cooler months | Pet-safe |
| Gladiolus-Flowered Werauhia | Bright indirect light (just back from a sunny window) | Refill the central tank weekly; water the growing medium every 1-2 weeks | Pet-safe |
| Glandular Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; very sparingly or not at all in winter | Pet-safe |
| Glaziou's Fuchsia | Bright indirect light (just back from a sunny window) | Water freely in growth; reduce in winter | Pet-safe |
| Gleditsia triacanthos 'Sunburst' | Direct sun (at least 4-6 hours) | Water weekly for the first two seasons; established trees are notably drought-tolerant | Pet-safe |
| Gleditsia triacanthos f. inermis | Direct sun (at least 4-6 hours) | Water weekly for the first two seasons; established trees are highly drought-tolerant | Pet-safe |
| Glenn Mango | Direct sun (at least 4-6 hours) | Deep soak when the top few centimetres of soil dry, about every 5-10 days in growth | Pet-safe |
| Globe amaranth | Direct sun (at least 4-6 hours) | Every 7–10 days; drought-tolerant once established | Pet-safe |
| Globe candytuft | Direct sun (at least 4-6 hours) | Every 7–10 days; keep evenly moist but not waterlogged | Pet-safe |
| Globe-Flowered Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–5 weeks in winter | Pet-safe |
| Glorious Columnea | Bright indirect light (just back from a sunny window) | When top 2–3 cm of mix dries | Pet-safe |
| Glory of Texas Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer and once every 5-6 weeks in winter | Pet-safe |
| Glossy Abelia | Direct sun (at least 4-6 hours) | Regularly during the first growing season; occasional deep watering once established | Pet-safe |
| Gloxinia perennis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Gloxinia sylvatica | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Gmelin's Sea Lavender | Direct sun (at least 4-6 hours) | Every 2–3 weeks when established | Pet-safe |
| Gnome Spruce | Direct sun (at least 4-6 hours) | Every 5-7 days; water when the surface of the small root zone dries | Pet-safe |
| Goat's Horn Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 2-3 weeks in summer; keep dry from late autumn through winter | Pet-safe |
| Goat's Horn Cactus | Direct sun (at least 4-6 hours) | When the soil is bone dry, every 10-14 days in summer; once every 4-6 weeks in winter | Pet-safe |
| Goehring's Dyckia | Direct sun (at least 4-6 hours) | When the compost is completely dry, roughly every 14-21 days in growing season | Pet-safe |
| Goeppertia Beauty Star | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Goeppertia Bella (Calathea bella) | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Goeppertia Flamestar | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Goeppertia Orbifolia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Goeppertia Setosa | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Goeppertia White Fusion | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Gold Charm Holiday Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Gold Dew Tufted Hair Grass | Bright indirect light (just back from a sunny window) | Moderate to frequent — prefers consistently moist soil | Pet-safe |
| Gold Dust Alyssum | Direct sun (at least 4-6 hours) | Fortnightly to monthly once established (very drought-tolerant) | Pet-safe |
| Gold Haze heather | Direct sun (at least 4-6 hours) | Weekly during first season; occasional watering once established | Pet-safe |
| Gold Mound Spirea | Direct sun (at least 4-6 hours) | Weekly when establishing; every 1–2 weeks once established | Pet-safe |
| Gold Rush Dawn Redwood | Direct sun (at least 4-6 hours) | Regularly — keep soil consistently moist, especially in summer | Pet-safe |
| Golden Alexanders | Bright indirect light (just back from a sunny window) | Weekly or as needed to keep soil moist | Pet-safe |
| Golden Apple | Direct sun (at least 4-6 hours) | Every 7–14 days; moderate drought tolerance when established | Pet-safe |
| Golden Arch Dendrobium | Bright indirect light (just back from a sunny window) | Every 5-7 days in active growth; reduce to every 3-4 weeks in winter | Pet-safe |
| Golden Ash | Direct sun (at least 4-6 hours) | Moderate; regular deep watering when establishing | Pet-safe |
| Golden Ball Cactus | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, about every 7-10 days in summer; minimal in winter | Pet-safe |
| Golden Bamboo | Direct sun (at least 4-6 hours) | Weekly when establishing; drought-tolerant once established | Pet-safe |
| Golden Barrel Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer; once a month or less in winter | Pet-safe |
| Golden Bow Dendrobium | Bright indirect light (just back from a sunny window) | Plentiful in warm summer growth; markedly reduced and near-dry over a cool winter rest | Pet-safe |
| Golden Cinquefoil | Direct sun (at least 4-6 hours) | Every 10–14 days; drought-tolerant once established | Pet-safe |
| Golden Cliff Stonecrop | Direct sun (at least 4-6 hours) | Every 10–14 days in spring and autumn; monthly in summer; very sparingly in winter | Pet-safe |
| Golden Corkscrew Plant | Bright indirect light (just back from a sunny window) | Keep medium permanently saturated; tray method with 1–2 cm standing water | Pet-safe |
| Golden Easter Lily Cactus | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is completely dry, roughly every 10-14 days in the growing season; once a month or less in winter. | Pet-safe |
| Golden Eriosyce | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is completely dry, every 10-14 days in summer | Pet-safe |
| Golden everlasting | Direct sun (at least 4-6 hours) | Every 7–10 days once established; reduce in autumn | Pet-safe |
| golden fescue | Direct sun (at least 4-6 hours) | Low; water every 10–14 days during the growing season, less in winter | Pet-safe |
| Golden Goddess Bamboo | Direct sun (at least 4-6 hours) | Twice weekly during dry periods in summer; reduce to weekly or less in cooler seasons | Pet-safe |
| Golden Ice Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks (allow soil to dry completely between waterings) | Pet-safe |
| Golden Lace Cactus | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 2-3 weeks in summer; keep nearly dry in winter | Pet-safe |
| Golden Malayan Dwarf Coconut | Direct sun (at least 4-6 hours) | Keep consistently moist; water every 3-5 days in heat, never drying out fully | Pet-safe |
| Golden Polypody | Bright indirect light (just back from a sunny window) | Every 5–7 days in spring and summer; every 10–14 days in autumn and winter | Pet-safe |
| Golden Polypody 'Davana' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Golden Powder Puff | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in active growth; none in winter | Pet-safe |
| Golden Rat Tail Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer and every 3-4 weeks in winter | Pet-safe |
| Golden Sea Lavender | Direct sun (at least 4-6 hours) | Every 2–4 weeks when established; very little in winter | Pet-safe |
| Golden Sedum | Direct sun (at least 4-6 hours) | Every 10–14 days in summer; every 3–4 weeks in winter | Pet-safe |
| Golden Star Cactus | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 10-14 days in summer; once every 4-6 weeks in winter | Pet-safe |
| Golden Torch Cactus | Direct sun (at least 4-6 hours) | When the soil is dry, about weekly to fortnightly in summer; keep dry in winter | Pet-safe |
| Golden Tree Fern | Bright indirect light (just back from a sunny window) | 2-3 times per week; trunk must stay moist | Pet-safe |
| Golden Tree Fern | Bright indirect light (just back from a sunny window) | Keep consistently moist; water when the top 3-5 cm of soil feels dry or when trunk feels dry to the touch, roughly every 3-7 days in summer | Pet-safe |
| Golden-Edged Cymbidium | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth, about every 5-7 days, drier in winter | Pet-safe |
| Golden-flowered Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks during the growing season; minimally in winter | Pet-safe |
| Golden-Hair Bamboo | Bright indirect light (just back from a sunny window) | Twice per week in growing season; once per week or less in winter | Pet-safe |
| Golden-spike Disa | Bright indirect light (just back from a sunny window) | Keep consistently moist throughout the year, roughly every 2-4 days | Pet-safe |
| Goldfinger Banana | Direct sun (at least 4-6 hours) | Keep evenly moist; water when the top 2-3 cm of soil is dry, every 2-4 days in active growth | Pet-safe |
| Goldfish Plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 7-10 days in growth | Pet-safe |
| Gomphrena globosa 'QIS Pink' | Direct sun (at least 4-6 hours) | Water deeply once a week; let soil dry between waterings | Pet-safe |
| Graceful Cattail | Direct sun (at least 4-6 hours) | Continuously moist to submerged | Pet-safe |
| Graham Thomas Rose | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week, more in heat | Pet-safe |
| Grand Cape Primrose | Bright indirect light (just back from a sunny window) | Every 7-14 days in growth; monthly in winter | Pet-safe |
| Grand Fir | Direct sun (at least 4-6 hours) | Weekly during establishment; rainfall-dependent once mature | Pet-safe |
| Grandidier's Baobab | Direct sun (at least 4-6 hours) | Every 10–14 days in the growing season; virtually none in autumn–winter dormancy | Pet-safe |
| Grape Ivy | Bright indirect light (just back from a sunny window) | When the top 1 inch (2.5 cm) of soil is dry | Pet-safe |
| Graptopetalum amethystinum | Direct sun (at least 4-6 hours) | When the soil is completely dry, about every 12-16 days in summer, sparingly in winter | Pet-safe |
| Graptopetalum bellum | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 12-16 days in growth, very little in winter | Pet-safe |
| Graptopetalum macdougallii | Direct sun (at least 4-6 hours) | When the soil is completely dry, about every 12-16 days in summer, minimal in winter | Pet-safe |
| Graptopetalum pentandrum | Direct sun (at least 4-6 hours) | Every 2-3 weeks (less in winter) | Pet-safe |
| Graptopetalum rusbyi | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Graptosedum 'California Sunset' | Direct sun (at least 4-6 hours) | Every 1-2 weeks in active growth; far less in winter | Pet-safe |
| Graptosedum 'Francesco Baldi' | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in summer, sparingly in winter | Pet-safe |
| Graptosedum 'Vera Higgins' | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in summer, sparingly in winter | Pet-safe |
| Graptoveria 'Acaulis' | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 1-2 weeks in growth | Pet-safe |
| Graptoveria 'Fred Ives' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 1-2 weeks in growth | Pet-safe |
| Graptoveria 'Fred Ives' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer | Pet-safe |
| Graptoveria 'Titubans' | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 10-14 days in growth, far less in winter | Pet-safe |
| Grass-leaf Disa | Bright indirect light (just back from a sunny window) | Keep consistently moist year-round, roughly every 2-3 days in summer | Pet-safe |
| grass-leaved bladderwort | Direct sun (at least 4-6 hours) | Permanently submerged in shallow aquarium or terrarium water column | Pet-safe |
| Grasshopper Lycaste | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; near-dry rest in winter | Pet-safe |
| Grassy Arrowhead | Direct sun (at least 4-6 hours) | Permanently aquatic; grow in standing water 5–30 cm (2–12 in) deep | Pet-safe |
| Gray Birch | Direct sun (at least 4-6 hours) | Moderate; tolerates drier conditions than most birches once established | Pet-safe |
| Gray Goldenrod | Direct sun (at least 4-6 hours) | Very drought-tolerant; supplemental water rarely needed | Pet-safe |
| Gray Organ Pipe | Direct sun (at least 4-6 hours) | When the top half of soil is dry, roughly every 10-14 days in summer; very infrequently in winter | Pet-safe |
| Grayleaf Cranesbill | Direct sun (at least 4-6 hours) | Every 7–10 days when dry; very sparingly in winter | Pet-safe |
| Great Pond Sedge | Direct sun (at least 4-6 hours) | Permanently wet; grows in standing water or waterlogged soil | Pet-safe |
| Greater Coreopsis | Bright indirect light (just back from a sunny window) | Low to moderate; drought-tolerant once established | Pet-safe |
| Greater Duckweed | Direct sun (at least 4-6 hours) | Permanently floating on water surface | Pet-safe |
| Greater Fringed Gentian | Bright indirect light (just back from a sunny window) | Regular — consistently moist | Pet-safe |
| Greater Knapweed | Direct sun (at least 4-6 hours) | Rarely needed once established; water new plants occasionally through their first summer | Pet-safe |
| Greater Pyramidal Saxifrage | Direct sun (at least 4-6 hours) | Every 10–14 days during the growing season; very sparingly in winter | Pet-safe |
| Greek Fir | Direct sun (at least 4-6 hours) | Every 2–3 weeks during establishment; rarely needed once mature | Pet-safe |
| Green Ash | Direct sun (at least 4-6 hours) | Weekly when establishing; drought-tolerant once mature | Pet-safe |
| Green Cabomba | Bright indirect light (just back from a sunny window) | Fully submerged aquatic; maintain in aquarium water continuously | Pet-safe |
| Green Glaucous Bamboo | Direct sun (at least 4-6 hours) | Twice weekly during establishment; every 7–14 days once mature | Pet-safe |
| Green Panda Bamboo | Bright indirect light (just back from a sunny window) | Twice weekly during establishment and dry spells; weekly once established | Pet-safe |
| Green Rock Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is completely dry, roughly every 10-14 days | Pet-safe |
| Green-Flowered Galtonia | Direct sun (at least 4-6 hours) | Regular from spring through late summer; reduce in autumn | Pet-safe |
| Green-flowered Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–12 days in the growing season; every 2–3 weeks in winter | Pet-safe |
| Green-spotted Billbergia | Bright indirect light (just back from a sunny window) | Keep central cup lightly filled; water substrate every 1-2 weeks | Pet-safe |
| Green-Spotted Neoregelia | Bright indirect light (just back from a sunny window) | Refresh central cup every 5–7 days; soil every 2–3 weeks | Pet-safe |
| Green-Yellow Catasetum | Bright indirect light (just back from a sunny window) | Once or twice weekly during active growth; cease completely once leaves drop | Pet-safe |
| Green's Ginger Lily | Bright indirect light (just back from a sunny window) | Keep consistently moist during active growth (spring to autumn); reduce watering in winter dormancy | Pet-safe |
| Greene's Liveforever | Bright indirect light (just back from a sunny window) | Every 2–3 weeks during active growth (autumn–spring); very little to none in summer | Pet-safe |
| Greenish Air Plant | Bright indirect light (just back from a sunny window) | 2–3 times per week (misting) or weekly soak | Pet-safe |
| Greenspire Linden | Direct sun (at least 4-6 hours) | Moderate; deep watering during establishment and drought | Pet-safe |
| Greenstem Forsythia | Direct sun (at least 4-6 hours) | Weekly while establishing, then drought-tolerant | Pet-safe |
| Grefsheim Spirea | Direct sun (at least 4-6 hours) | Weekly until established; reduce to occasional watering in drought | Pet-safe |
| Grey Club-rush | Direct sun (at least 4-6 hours) | Shallow to moderately deep aquatic; 10–60 cm over the crown | Pet-safe |
| Grey Goldenrod | Direct sun (at least 4-6 hours) | Low — drought-tolerant once established | Pet-safe |
| Grey Moor Grass | Direct sun (at least 4-6 hours) | Low to moderate; drought-tolerant once established | Pet-safe |
| Grey Sage | Direct sun (at least 4-6 hours) | Every 10-14 days; drought-tolerant once established | Pet-safe |
| Grey Speedwell | Direct sun (at least 4-6 hours) | Every 14–21 days during growing season; barely any in winter | Pet-safe |
| Grey-Headed Coneflower | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; drought-tolerant | Pet-safe |
| Grinning Argyroderma | Direct sun (at least 4-6 hours) | Every 3–4 weeks in autumn (main growing season); once or twice in spring; completely withheld mid-summer | Pet-safe |
| Guadua Bamboo | Direct sun (at least 4-6 hours) | Frequently during establishment; moderate once mature | Pet-safe |
| Guariroba Palm | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-10 days in summer | Pet-safe |
| Guatemalan Air Plant | Bright indirect light (just back from a sunny window) | Mist 2–3 times per week, or soak for 20–30 minutes once a week | Pet-safe |
| Gumbo Limbo | Direct sun (at least 4-6 hours) | Weekly when newly planted; once established, drought-tolerant and needs watering only during prolonged dry spells | Pet-safe |
| Gummy Uebelmannia | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, approximately every 10-14 days in summer; barely once a month in winter | Pet-safe |
| Guriri Palm | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days in the growing season | Pet-safe |
| Gurken's Orthophytum | Direct sun (at least 4-6 hours) | Allow to dry between waterings — roughly every 7–10 days | Pet-safe |
| Gurken's Star Bromeliad | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Guzmania | Bright indirect light (just back from a sunny window) | Keep the central cup filled; water soil weekly | Pet-safe |
| Guzmania 'Empire' | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; flush and refill it every 1-2 weeks, lightly moisten soil | Pet-safe |
| Guzmania 'Orangeade' | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; flush and refill every 1-2 weeks | Pet-safe |
| Guzmania 'Rana' | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; refresh it weekly and water the mix only when nearly dry | Pet-safe |
| Guzmania 'Torch' | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill it every 1-2 weeks, lightly moisten soil | Pet-safe |
| Guzmania conifera | Bright indirect light (just back from a sunny window) | Keep the central cup filled; refresh weekly and keep the mix barely moist | Pet-safe |
| Guzmania monostachia | Bright indirect light (just back from a sunny window) | Maintain water in the central cup; flush and refill every 1-2 weeks | Pet-safe |
| Guzmania wittmackii | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Gymnocalycium andreae | Bright indirect light (just back from a sunny window) | Soak-and-dry, roughly every 10-14 days in summer; keep dry in winter | Pet-safe |
| Gymnocalycium denudatum | Bright indirect light (just back from a sunny window) | Soak-and-dry, roughly every 10-14 days in summer; keep dry in winter | Pet-safe |
| H.E. Beale heather | Direct sun (at least 4-6 hours) | Weekly during first season; monthly or as needed once established | Pet-safe |
| Hair sedge | Bright indirect light (just back from a sunny window) | Regular watering to maintain even moisture; reduce slightly in winter | Pet-safe |
| Hairy Beardtongue | Bright indirect light (just back from a sunny window) | Every 1–2 weeks once established; more frequent when newly planted | Pet-safe |
| Hairy Coreopsis | Direct sun (at least 4-6 hours) | Low to moderate; water during establishment, then as needed during drought | Pet-safe |
| Hairy Gibbaeum | Bright indirect light (just back from a sunny window) | Every 3–4 weeks in winter and spring (active season); dry in summer | Pet-safe |
| Hairy Ginger Lily | Bright indirect light (just back from a sunny window) | Keep moist throughout active growth; water sparingly in winter | Pet-safe |
| Hairy Houseleek | Direct sun (at least 4-6 hours) | Every 2–4 weeks in the growing season; once a month or less in winter | Pet-safe |
| Hairy Jovibarba | Direct sun (at least 4-6 hours) | Every 2–4 weeks during the growing season; sparingly in winter | Pet-safe |
| Hairy Kohleria | Bright indirect light (just back from a sunny window) | Every 7–10 days during growth; minimal in dormancy | Pet-safe |
| Hairy Mallow | Direct sun (at least 4-6 hours) | Every 7–10 days in summer, every 14–21 days in winter | Pet-safe |
| Hairy Peperomia | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (allow soil to nearly dry between waterings) | Pet-safe |
| Hairy Rock Jasmine | Direct sun (at least 4-6 hours) | Sparingly; dry conditions preferred especially in winter | Pet-safe |
| Hairy Sinningia | Bright indirect light (just back from a sunny window) | Weekly during growth; withheld during dormancy | Pet-safe |
| Hairy Stonecrop | Direct sun (at least 4-6 hours) | Every 2–3 weeks in growing season; minimal in winter | Pet-safe |
| Hairy Sun Pitcher | Bright indirect light (just back from a sunny window) | Keep medium consistently moist; use a shallow tray with no more than 1 cm of water | Pet-safe |
| Hairy-beard Gastrochilus | Bright indirect light (just back from a sunny window) | Mount: daily root misting; pot: every 3-4 days during growth, every 7-10 days in cooler months | Pet-safe |
| Hairy-Cupped Coelogyne | Bright indirect light (just back from a sunny window) | Every 4–6 days in active growth; every 10–14 days in winter | Pet-safe |
| Hairy-fruited Draba | Direct sun (at least 4-6 hours) | Every 10–14 days during growth; very little in winter | Pet-safe |
| Hairy-Fruited Wickerware Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer; reduce to every 14-21 days in winter | Pet-safe |
| Halesia carolina | Bright indirect light (just back from a sunny window) | Weekly while establishing; regular watering in dry spells | Pet-safe |
| Halesia monticola | Bright indirect light (just back from a sunny window) | Weekly while establishing; regular watering in dry spells | Pet-safe |
| Hall's Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during active growth (autumn to early spring); none in summer dormancy | Pet-safe |
| Hall's Living Stones | Direct sun (at least 4-6 hours) | Seasonally — water in autumn (September–November) only; completely dry in winter and summer | Pet-safe |
| Hameln Dwarf Fountain Grass | Direct sun (at least 4-6 hours) | When the top few centimetres of soil dry, about weekly while establishing; drought-tolerant once settled | Pet-safe |
| Hameln Fountain Grass | Direct sun (at least 4-6 hours) | Weekly for the first season; every 2 weeks once established | Pet-safe |
| Hamilton's Sundew | Bright indirect light (just back from a sunny window) | Keep tray with 1–2 cm of water at all times | Pet-safe |
| Hamilton's Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring and summer, every 3–4 weeks in autumn and winter | Pet-safe |
| Hand-Bearing Oncidium | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 10–14 days in winter | Pet-safe |
| Hanging Lobster Claw | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water when only the top 1-2 cm dries, roughly every 3-5 days in warm conditions | Pet-safe |
| Hansa Rose | Direct sun (at least 4-6 hours) | Water weekly while establishing; drought-tolerant once settled | Pet-safe |
| Happy Bean Peperomia | Bright indirect light (just back from a sunny window) | Every 1-2 weeks | Pet-safe |
| Happy Bean Peperomia | Bright indirect light (just back from a sunny window) | Every 14–21 days in spring/summer; every 4–6 weeks in winter | Pet-safe |
| Hard Rush | Direct sun (at least 4-6 hours) | Consistently moist to saturated soil; tolerates standing water to 7 cm (3 in) deep | Pet-safe |
| Hardy Chinese Windmill Palm | Direct sun (at least 4-6 hours) | Weekly while establishing; established garden plants need little extra water | Pet-safe |
| Hare's Foot Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Hare's Tail Grass | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-14 days | Pet-safe |
| Harebell | Direct sun (at least 4-6 hours) | Low — drought-tolerant once established | Pet-safe |
| Harlow Carr Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in growth; more in heat or pots | Pet-safe |
| Hasse's Liveforever | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in the growing season (autumn–spring); virtually none in summer | Pet-safe |
| Hatchet Cactus | Direct sun (at least 4-6 hours) | When the potting mix is completely dry, roughly every 14-21 days in summer; very sparingly in winter (once every 4-6 weeks) | Pet-safe |
| Hatschbach's Fuchsia | Bright indirect light (just back from a sunny window) | Water freely in growth; keep just moist in winter | Pet-safe |
| Haussknecht's Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks in growing season (spring–summer); every 4–6 weeks or rainfall-only in winter | Pet-safe |
| Hawaiian Tree Fern | Bright indirect light (just back from a sunny window) | 2-3 times per week in growing season, reduce in winter | Pet-safe |
| Haworthia | Bright indirect light (just back from a sunny window) | When the soil is dry, every 2-3 weeks | Pet-safe |
| Haworthia Bayeri | Bright indirect light (just back from a sunny window) | When soil is fully dry, about every 10-14 days in active growth, minimal in winter | Pet-safe |
| Haworthia cooperi var. truncata | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks | Pet-safe |
| Haworthia Emelyae | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haworthia Herbacea | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haworthia Lockwoodii | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haworthia Magnifica | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haworthia Mucronata | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haworthia Obtusa | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 1-2 weeks in growth | Pet-safe |
| Haworthia Pygmaea | Bright indirect light (just back from a sunny window) | When soil is fully dry, about every 10-14 days in active growth, minimal in winter | Pet-safe |
| Haworthia Springbokvlakensis | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haworthia Tessellata | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haworthia Turgida | Bright indirect light (just back from a sunny window) | When soil is fully dry, about every 7-12 days in summer, sparse in winter | Pet-safe |
| Haworthia Venosa | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haworthiopsis Viscosa | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Haygarth's Cape Primrose | Bright indirect light (just back from a sunny window) | Every 7-10 days in growth; every 3-4 weeks in winter | Pet-safe |
| Hayne's Matucana | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, every 7-14 days in summer | Pet-safe |
| Heart-leaf Fan Palm | Bright indirect light (just back from a sunny window) | When the top 2–3 cm of soil feels dry | Pet-safe |
| Heart-Leaf Krohniana | Bright indirect light (just back from a sunny window) | When the top 1-2 inches (2-5 cm) of mix are dry | Pet-safe |
| Heart-leaved Globe Daisy | Direct sun (at least 4-6 hours) | Every 2–3 weeks in summer; very sparingly in winter | Pet-safe |
| Heart-Lipped Brassavola | Bright indirect light (just back from a sunny window) | Every 4–6 days in active growth; reduce to every 7–10 days in cooler months | Pet-safe |
| Heartleaf Golden Alexanders | Bright indirect light (just back from a sunny window) | Every 1–2 weeks once established; more frequently in the first season | Pet-safe |
| Heath Speedwell | Bright indirect light (just back from a sunny window) | Low to moderate — allow soil to partially dry between waterings | Pet-safe |
| Heath-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Heather | Direct sun (at least 4-6 hours) | Weekly during establishment; drought-tolerant once established | Pet-safe |
| Heavy Metal Switchgrass | Direct sun (at least 4-6 hours) | Weekly when establishing; every 2–3 weeks once established | Pet-safe |
| Hedge Bamboo | Bright indirect light (just back from a sunny window) | 2-3 times per week; daily in summer heat or in containers | Pet-safe |
| Hedgehog Cactus | Bright indirect light (just back from a sunny window) | When the soil is dry, roughly every 1-2 weeks in summer; keep dry in winter | Pet-safe |
| Hedgehog Fescue | Direct sun (at least 4-6 hours) | Every 14–21 days when established; very sparingly in winter | Pet-safe |
| Hedgerow Cranesbill | Bright indirect light (just back from a sunny window) | Low to moderate; water only to establish, then drought-tolerant | Pet-safe |
| Heldreich's Sage | Direct sun (at least 4-6 hours) | Occasional; drought-tolerant once established | Pet-safe |
| Helianthus 'Lemon Queen' | Direct sun (at least 4-6 hours) | Water when the top 3-4 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Helianthus × multiflorus 'Loddon Gold' | Direct sun (at least 4-6 hours) | About once or twice a week, keeping soil moist in summer | Pet-safe |
| Helianthus decapetalus 'Flore Pleno' | Direct sun (at least 4-6 hours) | Water when the top 3-4 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Helianthus salicifolius | Direct sun (at least 4-6 hours) | Water when the top 3-4 cm of soil is dry, roughly every 7-10 days; drought-tolerant once established | Pet-safe |
| Helmet-Shaped Gongora | Bright indirect light (just back from a sunny window) | Every 4–6 days when actively growing; reduce to every 10–14 days in winter | Pet-safe |
| Helmut's Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during active autumn-to-spring growth only; strictly none in summer | Pet-safe |
| Hemigraphis alternata | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 3-5 days in warm growth | Pet-safe |
| Heneken's Tolumnia | Bright indirect light (just back from a sunny window) | When the roots appear silvery-white and the fan base is dry, roughly every 4-7 days | Pet-safe |
| Henry's Lime | Bright indirect light (just back from a sunny window) | Weekly during establishment; deep watering every 2–3 weeks in dry periods | Pet-safe |
| Hens and chicks | Direct sun (at least 4-6 hours) | Only when soil is fully dry; roughly every 1-2 weeks in summer, every 4-6 weeks in winter | Pet-safe |
| Heritage River Birch | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week in the first 2 years; established trees prefer consistently moist soil | Pet-safe |
| Hernandez-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring and summer; every 3–4 weeks in autumn and winter | Pet-safe |
| Herre's Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during autumn-to-spring active period; none in summer | Pet-safe |
| Herrenhausen Oregano | Direct sun (at least 4-6 hours) | Every 10–14 days when established; more frequently for young plants | Pet-safe |
| Heterodoxa Sun Pitcher | Bright indirect light (just back from a sunny window) | Water every 3-5 days, maintaining a consistently moist but not waterlogged substrate; keep pitchers partially filled with distilled or rainwater | Pet-safe |
| Heucherella Brass Lantern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in the growing season | Pet-safe |
| Heuffel's Jovibarba | Direct sun (at least 4-6 hours) | Every 2–4 weeks in growing season; rarely in winter | Pet-safe |
| Hibiscus | Direct sun (at least 4-6 hours) | Deep watering every 5-7 days, more in heat | Pet-safe |
| Hibiscus rosa-sinensis 'Cooper' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, every 3-5 days in active growth | Pet-safe |
| Hibiscus syriacus 'Aphrodite' | Direct sun (at least 4-6 hours) | Weekly while establishing; every 10-14 days once mature unless rainfall is sparse | Pet-safe |
| Hibiscus syriacus 'Blue Bird' | Direct sun (at least 4-6 hours) | Water weekly during the first two seasons and in summer droughts; established plants are moderately drought-tolerant | Pet-safe |
| Hibiscus syriacus 'Helene' | Direct sun (at least 4-6 hours) | Water weekly while establishing and during summer drought; moderately drought-tolerant once mature | Pet-safe |
| Hibiscus syriacus 'Minerva' | Direct sun (at least 4-6 hours) | Water weekly during establishment and summer drought; moderately drought-tolerant once established | Pet-safe |
| Hildebrands Basket Vine | Bright indirect light (just back from a sunny window) | Water when the top 2 cm of the potting mix has dried out, roughly every 5–8 days in summer | Pet-safe |
| Hildebrandt Ravenea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Hill Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Hillii Staghorn Fern | Bright indirect light (just back from a sunny window) | Soak when the mount is nearly dry, roughly weekly in summer and every 2-3 weeks in winter | Pet-safe |
| Himalayan Inula | Bright indirect light (just back from a sunny window) | 2-3 times per week; maintain consistent moisture | Pet-safe |
| Hindu rope plant | Bright indirect light (just back from a sunny window) | When the soil is nearly dry, roughly every 10-14 days in growth | Pet-safe |
| Hindu Rope Plant | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of compost is dry, roughly every 10-14 days in summer | Pet-safe |
| Hindu Rope Plant | Bright indirect light (just back from a sunny window) | When the mix is mostly dry, every 10-14 days or longer | Pet-safe |
| Hoary Plantain | Direct sun (at least 4-6 hours) | Rarely; established plants are drought-tolerant | Pet-safe |
| Hoary Stock | Direct sun (at least 4-6 hours) | Weekly, allowing soil to dry slightly between waterings | Pet-safe |
| Hohenbergia stellata | Bright indirect light (just back from a sunny window) | Keep the central tank filled; water the mix when its top 3-4 cm is dry | Pet-safe |
| Hollow Joe Pye Weed | Direct sun (at least 4-6 hours) | Keep soil reliably moist; water weekly or more during dry weather | Pet-safe |
| Hollow-Corolla Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–20 days in summer, very sparingly in winter | Pet-safe |
| Holly Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Hollyhock | Direct sun (at least 4-6 hours) | Weekly during active growth; reduce in autumn and winter | Pet-safe |
| Honeysuckle Fuchsia | Bright indirect light (just back from a sunny window) | Daily in active growth; less in winter | Pet-safe |
| Hooded Dendrobium | Bright indirect light (just back from a sunny window) | Abundant in summer growth; nearly withheld over the deciduous winter rest | Pet-safe |
| Hooded Pitcher Plant | Direct sun (at least 4-6 hours) | Keep the tray method: maintain 1-3 cm of distilled or rainwater in the saucer at all times during the growing season; reduce to just-moist in winter dormancy | Pet-safe |
| Hooker's Ginger Lily | Bright indirect light (just back from a sunny window) | Consistently moist in active growth (spring–autumn); reduce significantly in winter | Pet-safe |
| Hooker's Inula | Bright indirect light (just back from a sunny window) | 2 times per week; tolerates periodic damp conditions | Pet-safe |
| Hooker's Orchid Cactus | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, approximately every 7-14 days in spring and summer; reduce to once every 3-4 weeks in autumn and winter | Pet-safe |
| Hoop Pine | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Horn-Bearing Coryphantha | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, roughly every 10-14 days in summer; once a month or less in winter | Pet-safe |
| Horned Eriosyce | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once a month or less in winter | Pet-safe |
| Horned violet | Bright indirect light (just back from a sunny window) | Every 5–7 days; keep evenly moist | Pet-safe |
| Horst's Discocactus | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, roughly every 10-14 days in summer; reduce to once a month or less in winter | Pet-safe |
| Horst's Gymnocalycium | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, approximately every 7-10 days in summer; every 3-4 weeks in winter | Pet-safe |
| Hot Water Plant | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of potting mix is dry, roughly every 5-7 days during the growing season | Pet-safe |
| Houseleek Cliff Stonecrop | Direct sun (at least 4-6 hours) | Every 14–21 days in the growing season; very sparingly in winter | Pet-safe |
| Houseleek Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; very sparingly in winter | Pet-safe |
| Houseleek Saxifrage | Bright indirect light (just back from a sunny window) | Low — water sparingly at all times; near-dry in summer and winter | Pet-safe |
| Hoya | Bright indirect light (just back from a sunny window) | When the soil is mostly dry, every 10-14 days | Pet-safe |
| Hoya 'Krimson Princess' | Bright indirect light (just back from a sunny window) | When the top half of the mix is dry, every 7-14 days | Pet-safe |
| Hoya 'Krimson Queen' | Bright indirect light (just back from a sunny window) | When the top half of the mix is dry, every 7-14 days | Pet-safe |
| Hoya 'Mathilde' | Bright indirect light (just back from a sunny window) | Roughly every 7-10 days in summer; every 3-4 weeks in winter | Pet-safe |
| Hoya 'Mathilde' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-12 days | Pet-safe |
| Hoya 'Sunrise' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-12 days | Pet-safe |
| Hoya Acuta | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Aff. Lanceolata | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Aldrichii | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-12 days | Pet-safe |
| Hoya Archboldiana | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of the mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Australis | Bright indirect light (just back from a sunny window) | when top 2-3 cm of soil dries | Pet-safe |
| Hoya Australis 'Lisa' | Bright indirect light (just back from a sunny window) | Roughly every 1-2 weeks; only when the top 1-2 inches of soil are dry | Pet-safe |
| Hoya Bella | Bright indirect light (just back from a sunny window) | Every 7-10 days in spring/summer; every 2-3 weeks in winter | Pet-safe |
| Hoya Bella 'Variegata' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Hoya Bilobata | Bright indirect light (just back from a sunny window) | Every 7-10 days in spring/summer; about every 2 weeks in winter | Pet-safe |
| Hoya Blashernaezii | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Burtoniae | Bright indirect light (just back from a sunny window) | When the top 2-4 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Hoya Cagayanensis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya callistophylla | Bright indirect light (just back from a sunny window) | Roughly every 7-14 days in spring/summer, less in winter | Pet-safe |
| Hoya Calycina | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Campanulata | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Carnosa 'Rubra' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-14 days | Pet-safe |
| Hoya Carnosa Tricolor | Bright indirect light (just back from a sunny window) | Every 1-2 weeks; let the top inch dry out | Pet-safe |
| Hoya Carnosa Variegata | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, about every 7-14 days | Pet-safe |
| Hoya caudata (Sumatra) | Bright indirect light (just back from a sunny window) | Every 1-2 weeks in growth; every 2-3 weeks in winter | Pet-safe |
| Hoya Celata | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of the mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Chouke | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of the mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Cinnamomifolia | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of the mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Clemensiorum | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-10 days | Pet-safe |
| Hoya Compacta | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 10-14 days | Pet-safe |
| Hoya Compacta 'Regalis' | Bright indirect light (just back from a sunny window) | When the mix is dry to 4-5 cm down, about every 10-14 days | Pet-safe |
| Hoya Coriacea | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Cumingiana Yellow | Bright indirect light (just back from a sunny window) | When the top few centimetres are dry, roughly every 6-10 days in growth | Pet-safe |
| Hoya Cummingiana | Bright indirect light (just back from a sunny window) | When the top 2-4 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Hoya curtisii | Bright indirect light (just back from a sunny window) | Roughly weekly in spring and summer; every 10-14 days in autumn and winter | Pet-safe |
| Hoya Danumensis | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Davidcummingii | Bright indirect light (just back from a sunny window) | When the soil is nearly dry, roughly every 10-14 days | Pet-safe |
| Hoya Deykeae | Bright indirect light (just back from a sunny window) | When the top 3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Diptera | Bright indirect light (just back from a sunny window) | When the top 2-4 cm of the mix is dry, roughly every 6-10 days in growth | Pet-safe |
| Hoya Elliptica | Bright indirect light (just back from a sunny window) | When the top 2-4 cm of mix is dry, roughly every 7-12 days | Pet-safe |
| Hoya Engleriana | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, about every 6-9 days in growth | Pet-safe |
| Hoya Erythrina | Bright indirect light (just back from a sunny window) | When the top 3 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Erythrostemma | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Fitchii | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 10-12 days | Pet-safe |
| Hoya Flagellata | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Flavida | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Fraterna | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-14 days in growth | Pet-safe |
| Hoya fungii | Bright indirect light (just back from a sunny window) | When the top 1-2 inches of mix are dry, roughly every 1-2 weeks | Pet-safe |
| Hoya Fusca | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-12 days | Pet-safe |
| Hoya Gracilipes | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Gracilis | Bright indirect light (just back from a sunny window) | When the mix is nearly or fully dry, roughly every 10-14 days in growth | Pet-safe |
| Hoya Greenii | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Griffithii | Bright indirect light (just back from a sunny window) | When the top 3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Halconensis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya heuschkeliana | Bright indirect light (just back from a sunny window) | Roughly every 7-10 days in summer; every 2-3 weeks in winter | Pet-safe |
| Hoya Imperialis | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 7-10 days | Pet-safe |
| Hoya Incrassata | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Javanica | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya kentiana | Bright indirect light (just back from a sunny window) | Every 1-2 weeks; let the mix dry out between waterings | Pet-safe |
| Hoya Krimson Princess | Bright indirect light (just back from a sunny window) | Roughly every 1-2 weeks; let the soil dry almost completely first | Pet-safe |
| Hoya Krimson Queen | Bright indirect light (just back from a sunny window) | Roughly every 1-2 weeks; let the top 1-2 inches (or more) of soil dry first | Pet-safe |
| Hoya lacunosa | Bright indirect light (just back from a sunny window) | Roughly every 7-10 days in spring/summer; much less in autumn/winter | Pet-safe |
| Hoya Lacunosa 'Eskimo' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, about every 6-10 days in growth | Pet-safe |
| Hoya Lambii | Bright indirect light (just back from a sunny window) | When the top 3 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Latifolia | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Lauterbachii | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-12 days | Pet-safe |
| Hoya Leucorhoda | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-14 days | Pet-safe |
| Hoya Linearis | Bright indirect light (just back from a sunny window) | Every 7-10 days in spring/summer; every 2-3 weeks in winter | Pet-safe |
| Hoya Lobbii | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, about every 7-10 days in growth | Pet-safe |
| Hoya Loyceandrewsiana | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-14 days in growth | Pet-safe |
| Hoya macrophylla | Bright indirect light (just back from a sunny window) | When the top 1-2 inches (2.5-5 cm) of mix are dry | Pet-safe |
| Hoya Macrophylla 'Variegata' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-14 days | Pet-safe |
| Hoya Mappigera | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Meliflua | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Memoria (Gracilis) | Bright indirect light (just back from a sunny window) | Every 7-14 days in spring/summer; every 2-3 weeks in winter | Pet-safe |
| Hoya Micrantha | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Mindorensis | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 7-10 days | Pet-safe |
| Hoya Mitrata | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Neoguineensis | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Nicholsoniae | Bright indirect light (just back from a sunny window) | When the top few centimetres are dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Nummularia | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of the mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Obovata | Bright indirect light (just back from a sunny window) | When the top half of the mix is dry | Pet-safe |
| Hoya Odorata | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 7-10 days | Pet-safe |
| Hoya Onychoides | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Pachyclada | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Hoya Pallida | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-9 days in growth | Pet-safe |
| Hoya Pandurata | Bright indirect light (just back from a sunny window) | When the mix is nearly dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Parviflora | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Patella | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-9 days in growth | Pet-safe |
| Hoya Paxtonii | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Pentaphlebia | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Picta | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya polyneura (Fishtail Hoya) | Bright indirect light (just back from a sunny window) | Roughly weekly in spring and summer; every 2-3 weeks in winter | Pet-safe |
| Hoya Potsii | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Praetorii | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Pubescens | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya pubicalyx | Bright indirect light (just back from a sunny window) | When the top 2-3 cm is dry, roughly every 7-10 days in summer | Pet-safe |
| Hoya Pubicalyx 'Black Dragon' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-14 days | Pet-safe |
| Hoya Pubicalyx 'Pink Silver' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, about every 7-12 days in growth | Pet-safe |
| Hoya Pubicalyx 'Red Buttons' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, about every 7-12 days in growth | Pet-safe |
| Hoya Pubicalyx 'Royal Hawaiian Purple' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-14 days | Pet-safe |
| Hoya Pubicalyx 'Silver Pink' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Pubicalyx 'Splash' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-14 days | Pet-safe |
| Hoya Rebecca | Bright indirect light (just back from a sunny window) | When the top 2-4 cm of the mix is dry, roughly every 6-10 days in growth | Pet-safe |
| Hoya Retusa | Bright indirect light (just back from a sunny window) | Every 7-10 days in spring/summer; reduce sharply in winter | Pet-safe |
| Hoya Revoluta | Bright indirect light (just back from a sunny window) | When the top 2 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Rigida | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 10-14 days in growth | Pet-safe |
| Hoya Rosarioae | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Rosita | Bright indirect light (just back from a sunny window) | When the top 5 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Hoya Rotundiflora Variegata | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of the mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Sarawakensis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Scortechinii | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya sigillatis | Bright indirect light (just back from a sunny window) | Every 1-2 weeks; let the top 1-2 inches (3-5 cm) of mix dry out first | Pet-safe |
| Hoya Siikfongensis | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 10-14 days in growth | Pet-safe |
| Hoya Sipitangensis | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Solaniflora | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Spartioides | Bright indirect light (just back from a sunny window) | When the mix is nearly dry throughout, roughly every 12-18 days | Pet-safe |
| Hoya Subcalva | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Sunrise | Bright indirect light (just back from a sunny window) | When the top of the mix is dry, roughly every 7-14 days | Pet-safe |
| Hoya Surigaoensis | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days | Pet-safe |
| Hoya Sussuela | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Telosmoides | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Tsangii | Bright indirect light (just back from a sunny window) | When the top 2-4 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Hoya Undulata | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Hoya Vitellinoides | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of mix is dry, roughly every 10-14 days in growth | Pet-safe |
| Hoya Vitiensis | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya Wallichii | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 6-10 days in growth | Pet-safe |
| Hoya Walliniana | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of mix is dry, roughly every 7-12 days in growth | Pet-safe |
| Hoya wayetii | Bright indirect light (just back from a sunny window) | When the top inch of soil is dry | Pet-safe |
| Humboldt's Bladderwort | Bright indirect light (just back from a sunny window) | Keep bromeliad tank or equivalent reservoir filled with 2–5 cm of pure water at all times; change every 1–2 weeks | Pet-safe |
| Humboldt's Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 5-6 weeks in winter | Pet-safe |
| Hunchback Gymnocalycium | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-14 days in summer; every 3-4 weeks in winter | Pet-safe |
| Hylotelephium 'Autumn Joy' | Direct sun (at least 4-6 hours) | Roughly every 10-14 days in its first season; established plants rarely need watering | Pet-safe |
| Hylotelephium 'Purple Emperor' | Direct sun (at least 4-6 hours) | Every 10-14 days when young; established plants need little to no watering | Pet-safe |
| Hylotelephium spectabile 'Brilliant' | Direct sun (at least 4-6 hours) | Every 10-14 days while establishing; mature clumps rely on rainfall | Pet-safe |
| Hylotelephium telephium 'Munstead Dark Red' | Direct sun (at least 4-6 hours) | Every 10-14 days while establishing; mature plants are largely self-reliant | Pet-safe |
| Hypoestes phyllostachya 'Carmina' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 4-7 days | Pet-safe |
| Hypoestes phyllostachya 'Confetti Pink' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 4-7 days | Pet-safe |
| Hypoestes phyllostachya 'Splash Select Pink' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, often every 4-7 days | Pet-safe |
| Hypoestes phyllostachya 'Splash Select White' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 4-7 days | Pet-safe |
| Hypoestes phyllostachya 'Wit' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 4-7 days | Pet-safe |
| Iberian Cranesbill | Bright indirect light (just back from a sunny window) | Weekly in spring and summer; occasional in autumn | Pet-safe |
| Ice Cream Banana | Direct sun (at least 4-6 hours) | Keep evenly moist; water when the top 2-3 cm of soil dries, every 2-4 days in warm growth | Pet-safe |
| Ice Plant | Direct sun (at least 4-6 hours) | Every 10-14 days during establishment; mature clumps rely on rainfall | Pet-safe |
| Iceberg Rose | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week, more in heat | Pet-safe |
| Idaho fescue | Direct sun (at least 4-6 hours) | Very low; water every 2–3 weeks during the first season; monthly or less once established | Pet-safe |
| Illinois Tick Trefoil | Direct sun (at least 4-6 hours) | Deep watering every 10–14 days during the first growing season; drought-tolerant once established | Pet-safe |
| Impatiens hawkeri 'SunPatiens Compact Hot Coral' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, often daily in full sun during summer | Pet-safe |
| Impatiens hawkeri 'SunPatiens Spreading White' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, often daily in full sun and in baskets | Pet-safe |
| Imperial Bromeliad | Direct sun (at least 4-6 hours) | Water sparingly; allow potting medium to almost completely dry between waterings | Pet-safe |
| Indian Blanket | Direct sun (at least 4-6 hours) | Every 1–2 weeks; drought-tolerant once established | Pet-safe |
| Indian Fig Opuntia | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 4-6 weeks in winter | Pet-safe |
| indian grass | Direct sun (at least 4-6 hours) | Rarely once established; water during the first growing season to aid establishment | Pet-safe |
| Indian Head Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 7-10 days in spring and summer; every 3-4 weeks in autumn; minimal in winter | Pet-safe |
| Indian Head Notocactus | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 10-14 days in the active growing season; reduce to once every 5-8 weeks in winter | Pet-safe |
| Indian Shot | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Indian Summer black-eyed Susan | Direct sun (at least 4-6 hours) | Weekly; allow the top 2–3 cm of soil to dry slightly between waterings | Pet-safe |
| Indian Timber Bamboo | Direct sun (at least 4-6 hours) | 2-3 times per week during the growing season; reduce in winter | Pet-safe |
| Inflated Bladderwort | Direct sun (at least 4-6 hours) | Permanently aquatic in soft, acidic, low-nutrient water; refresh or top up with distilled or rainwater as needed | Pet-safe |
| Inflated Wax Plant | Bright indirect light (just back from a sunny window) | Every 14–21 days in summer, every 4–6 weeks in winter | Pet-safe |
| Intergeneric Aliceara 'Pacific Sabre' | Bright indirect light (just back from a sunny window) | Water thoroughly when the top of the bark approaches dryness, typically every 5-7 days | Pet-safe |
| Intrigue Rose | Direct sun (at least 4-6 hours) | Deeply 1-2 times weekly, about 4-5 litres per plant | Pet-safe |
| Ionas Sun Pitcher | Bright indirect light (just back from a sunny window) | Water every 3-5 days to keep substrate consistently moist; maintain a partial fill of distilled water in the pitchers at all times | Pet-safe |
| Ionas' sun pitcher | Bright indirect light (just back from a sunny window) | Daily or every other day; keep media continuously moist | Pet-safe |
| Iridescent Bamboo | Direct sun (at least 4-6 hours) | Twice weekly in spring and summer; weekly in autumn; fortnightly in winter | Pet-safe |
| Irish heath | Direct sun (at least 4-6 hours) | Weekly while establishing; every 2–3 weeks once established | Pet-safe |
| Isabel Chan's Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring and summer, every 3–4 weeks in winter | Pet-safe |
| Island Liveforever | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in active season (October–April); none to minimal in summer | Pet-safe |
| Italian aster | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; drought-tolerant in summer | Pet-safe |
| Ivory Cymbidium | Bright indirect light (just back from a sunny window) | Thorough watering every 5–7 days in active growth; reduce significantly in winter | Pet-safe |
| Ivory Sea Holly | Direct sun (at least 4-6 hours) | Moderate — water regularly during the growing season; reduce in winter | Pet-safe |
| Jaboticaba | Bright indirect light (just back from a sunny window) | Every 5–7 days; keep consistently moist but not waterlogged | Pet-safe |
| Jamaican Tall Coconut | Direct sun (at least 4-6 hours) | Keep consistently moist; water every 3-5 days in heat, never drying out fully | Pet-safe |
| Japanese Arborvitae | Direct sun (at least 4-6 hours) | Regular — keep soil evenly moist; do not allow to dry out completely | Pet-safe |
| Japanese Banana | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water every 4-6 days in active growth | Pet-safe |
| Japanese Big-Leaf Magnolia | Bright indirect light (just back from a sunny window) | Weekly during dry periods; established trees are moderately drought-tolerant | Pet-safe |
| Japanese Camellia | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry; keep evenly moist in late summer | Pet-safe |
| Japanese Camellia 'Nuccio's Pearl' | Bright indirect light (just back from a sunny window) | About weekly, more in heat and during budding; water when the top 3-5 cm of soil is dry | Pet-safe |
| Japanese Cornel Dogwood | Direct sun (at least 4-6 hours) | Regular watering while establishing; drought-tolerant once mature | Pet-safe |
| Japanese Dunce Cap | Direct sun (at least 4-6 hours) | Every 10–14 days in the growing season; reduce significantly in winter dormancy | Pet-safe |
| Japanese Maple 'Dissectum' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, often weekly in summer | Pet-safe |
| Japanese Maple 'Osakazuki' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, around weekly in dry weather | Pet-safe |
| Japanese Maple 'Sango Kaku' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly weekly in dry spells | Pet-safe |
| Japanese Maple 'Tamukeyama' | Bright indirect light (just back from a sunny window) | One to two deep waterings per week when growing | Pet-safe |
| Japanese Rose | Direct sun (at least 4-6 hours) | Weekly while young, then drought-tolerant once established | Pet-safe |
| Japanese Rush | Bright indirect light (just back from a sunny window) | Permanently submerged aquatic plant | Pet-safe |
| Japanese Spirea | Direct sun (at least 4-6 hours) | Once per week while establishing; drought-tolerant when established | Pet-safe |
| Japanese Spirea 'Goldflame' | Direct sun (at least 4-6 hours) | Water when the top 5 cm of soil is dry, about weekly while establishing | Pet-safe |
| Japanese Timber Bamboo | Direct sun (at least 4-6 hours) | Frequent during establishment; moderate once established | Pet-safe |
| Japanese Tree Lilac 'Ivory Silk' | Direct sun (at least 4-6 hours) | Weekly deep soakings for the first two years, then during droughts | Pet-safe |
| Japanese Witch Hazel | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-14 days in the growing season | Pet-safe |
| Jasmine (Pink Jasmine) | Bright indirect light (just back from a sunny window) | When the top 2-3cm of soil feels dry, roughly weekly in growth | Pet-safe |
| Jasminum beesianum | Direct sun (at least 4-6 hours) | Keep evenly moist while establishing; water in prolonged dry spells once mature | Pet-safe |
| Jasminum mesnyi | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Jasminum nudiflorum | Direct sun (at least 4-6 hours) | When the top few centimetres of soil dry out, about every 7-10 days while establishing | Pet-safe |
| Jasminum sambac 'Grand Duke of Tuscany' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 4-7 days in growth | Pet-safe |
| Jasminum sambac 'Maid of Orleans' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-6 days in warm growth | Pet-safe |
| Java Plum | Direct sun (at least 4-6 hours) | Water regularly when young; established trees are drought-tolerant and flood-tolerant. | Pet-safe |
| Jean's Dilly Spruce | Bright indirect light (just back from a sunny window) | Regular; do not allow to dry out completely, especially in warm weather | Pet-safe |
| Jeddeloh Hemlock | Bright indirect light (just back from a sunny window) | Regular — do not allow to dry out | Pet-safe |
| Jelly Peperomia | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, typically every 7-12 days | Pet-safe |
| Jenkins Fan Palm | Bright indirect light (just back from a sunny window) | When top 2–3 cm of soil feels dry | Pet-safe |
| Jenkins Fan Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in growing season | Pet-safe |
| Jewel Orchid | Bright indirect light (just back from a sunny window) | Every 7-10 days; keep the mix evenly moist, never bone dry | Pet-safe |
| Johann's Neoregelia | Bright indirect light (just back from a sunny window) | Top up central cup every 5–7 days; soil every 2–3 weeks | Pet-safe |
| Joseph's Coat Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days in spring/summer; every 10–14 days in autumn/winter | Pet-safe |
| Jubilee Celebration Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the growing season; more in heat | Pet-safe |
| Julia Child Rose | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week, more in heat | Pet-safe |
| Jungfrau Saxifrage | Bright indirect light (just back from a sunny window) | Water moderately; allow soil to partially dry between waterings and reduce in winter. | Pet-safe |
| Jungle Geranium | Direct sun (at least 4-6 hours) | Water when the top 2-3 cm of soil feels dry, roughly 1-2 times per week in growth | Pet-safe |
| Juniper-leaved Thrift | Direct sun (at least 4-6 hours) | Every 10–14 days during growth; very sparingly in winter | Pet-safe |
| Just Joey Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly while in growth | Pet-safe |
| Kamchatka Stonecrop | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is fully dry, roughly every 10-14 days; very infrequently once established | Pet-safe |
| Karas Mountains Living Stones | Direct sun (at least 4-6 hours) | Only during the active growth window: water sparingly when new leaves are developing (roughly autumn to late spring). Withhold water entirely in summer dormancy. | Pet-safe |
| Karl Foerster Feather Reed Grass | Direct sun (at least 4-6 hours) | When the top few centimetres of soil dry, roughly weekly; tolerant of occasional wet ground | Pet-safe |
| Karl Foerster Feather Reed Grass | Bright indirect light (just back from a sunny window) | Weekly during establishment; every 2 weeks once established | Pet-safe |
| Karl Foerster Reed Grass | Bright indirect light (just back from a sunny window) | Every 7-14 days during the first season; established plants need water only in prolonged drought | Pet-safe |
| Karley Rose Oriental Fountain Grass | Direct sun (at least 4-6 hours) | Weekly in the first season, then moderate watering during dry periods | Pet-safe |
| Katz Sakura stock | Direct sun (at least 4-6 hours) | Every 3–5 days; keep soil evenly moist but never waterlogged | Pet-safe |
| Kauri | Bright indirect light (just back from a sunny window) | Every 5–7 days in spring/summer; reduce to every 10–14 days in winter | Pet-safe |
| Kenneally's Sundew | Bright indirect light (just back from a sunny window) | Standing tray (growing season); minimal (dry rest) | Pet-safe |
| Khirni | Direct sun (at least 4-6 hours) | Every 7–14 days when young; drought-tolerant once established | Pet-safe |
| kidney-leaved bladderwort | Bright indirect light (just back from a sunny window) | Keep media consistently moist; sit in shallow tray of 1 cm of water or mist daily | Pet-safe |
| Kiftsgate Rose | Direct sun (at least 4-6 hours) | Deep weekly soak while establishing; little needed once mature | Pet-safe |
| Kim cape primrose | Bright indirect light (just back from a sunny window) | Every 7–10 days during spring and summer; every 14–21 days in winter | Pet-safe |
| King Ferdinand's Saxifrage | Bright indirect light (just back from a sunny window) | Low — water moderately in active growth; reduce sharply in summer dormancy and winter | Pet-safe |
| King George aster | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; rarely needs irrigation in UK climates | Pet-safe |
| King Henry Venus flytrap | Direct sun (at least 4-6 hours) | Continuously moist via tray method; barely damp in winter | Pet-safe |
| King Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| King Size Scarlet everlasting | Direct sun (at least 4-6 hours) | Every 7–10 days; water deeply then let soil partially dry | Pet-safe |
| Kirk's Huernia | Bright indirect light (just back from a sunny window) | Every 14–21 days when growing (spring–autumn); once monthly or less in winter | Pet-safe |
| Kneed Alcantarea | Bright indirect light (just back from a sunny window) | Refill the large central cup every 5-7 days; water the medium sparingly only when the top 4-5 cm is dry, roughly every 14-21 days | Pet-safe |
| Kniphofia 'Alcazar' | Direct sun (at least 4-6 hours) | Weekly while establishing and during summer drought; minimal once mature | Pet-safe |
| Kniphofia 'Bees' Sunset' | Direct sun (at least 4-6 hours) | Weekly while establishing and during drought; little once mature | Pet-safe |
| Kniphofia 'Little Maid' | Direct sun (at least 4-6 hours) | Weekly while establishing and in summer drought; sparing once settled | Pet-safe |
| Kniphofia 'Tawny King' | Direct sun (at least 4-6 hours) | Weekly during the first season and in summer drought; established clumps need little once settled | Pet-safe |
| Kniphofia triangularis | Direct sun (at least 4-6 hours) | Every 10-14 days once established, when soil is dry | Pet-safe |
| Kniphofia uvaria | Direct sun (at least 4-6 hours) | Water regularly through the first season, then mainly in summer dry spells once established | Pet-safe |
| Knock Out Rose | Direct sun (at least 4-6 hours) | About 2.5 cm of water weekly, deep soak | Pet-safe |
| Knotted Clover | Direct sun (at least 4-6 hours) | Low; drought-tolerant | Pet-safe |
| Kobus Magnolia | Direct sun (at least 4-6 hours) | Weekly when establishing; once established, natural rainfall is often sufficient except during prolonged drought | Pet-safe |
| Kohleria | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 5-7 days in growth | Pet-safe |
| Kohleria 'Dark Velvet' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Kohleria 'Hannah Roberts' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Kohleria amabilis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Kohleria digitaliflora | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Korean feather reed grass | Bright indirect light (just back from a sunny window) | Water deeply 1-2 times weekly; keep soil consistently moist but not waterlogged | Pet-safe |
| Korean Fir | Direct sun (at least 4-6 hours) | Weekly during establishment; moderately drought-tolerant once mature | Pet-safe |
| Korean Spice Viburnum | Direct sun (at least 4-6 hours) | Water when the top 5 cm of soil is dry, about weekly while establishing | Pet-safe |
| Kotschyan Aerangis | Bright indirect light (just back from a sunny window) | Every 5-7 days in growth; every 10-14 days during winter rest | Pet-safe |
| Kousa Dogwood | Bright indirect light (just back from a sunny window) | Weekly deep watering while establishing | Pet-safe |
| Kramer's Butterfly Orchid | Bright indirect light (just back from a sunny window) | When the top of the bark is nearly dry, every 7-10 days year-round | Pet-safe |
| Kucyniak's Columnea | Bright indirect light (just back from a sunny window) | When top 2–3 cm of compost is dry | Pet-safe |
| Kucynjak's Columnea | Bright indirect light (just back from a sunny window) | Every 5–7 days in summer; every 10–14 days in winter | Pet-safe |
| Kupper's Werauhia | Bright indirect light (just back from a sunny window) | Refill tank weekly; water substrate every 1-2 weeks when top layer is dry | Pet-safe |
| Lace Fern | Bright indirect light (just back from a sunny window) | When the soil is completely dry, approximately every 10-21 days depending on temperature and season | Pet-safe |
| Lace Flower Vine | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, about every 5-7 days | Pet-safe |
| Laceleaf Japanese Maple 'Crimson Queen' | Bright indirect light (just back from a sunny window) | Deeply once or twice a week in the growing season, more in heat | Pet-safe |
| Lady Fern | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil starts to dry, roughly every 3-5 days indoors | Pet-safe |
| Lady Finger Banana | Direct sun (at least 4-6 hours) | Keep consistently moist; water when the top 2-3 cm of soil dries, roughly every 2-4 days in warm growth | Pet-safe |
| Lady Finger Cactus | Direct sun (at least 4-6 hours) | Roughly every 2-3 weeks in summer; far less in winter | Pet-safe |
| Lady of Shalott Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season; more in heat or sandy soil | Pet-safe |
| Lady of the Night | Bright indirect light (just back from a sunny window) | When fully dry, roughly every 7-10 days | Pet-safe |
| Lady of the Night | Bright indirect light (just back from a sunny window) | Allow roots and medium to dry almost completely between waterings, roughly every 5-7 days in active growth and every 10-14 days in winter rest | Pet-safe |
| Ladybird Scarlet cosmos | Direct sun (at least 4-6 hours) | Weekly; allow soil surface to dry between waterings | Pet-safe |
| Laelia anceps | Bright indirect light (just back from a sunny window) | Every 5-7 days when growing; reduce sharply through winter rest | Pet-safe |
| Laelia gouldiana | Bright indirect light (just back from a sunny window) | Every 5-7 days in growth; sparingly through the dry winter rest | Pet-safe |
| Laelia purpurata | Bright indirect light (just back from a sunny window) | Every 5-7 days in growth; less in the cooler rest, every 10-14 days | Pet-safe |
| Laelia rubescens | Bright indirect light (just back from a sunny window) | Every 5-7 days in growth; very sparingly in the long dry rest | Pet-safe |
| Laguna Beach Liveforever | Bright indirect light (just back from a sunny window) | Every 10–14 days from autumn through spring; withhold almost entirely in summer | Pet-safe |
| Lamellate Rainbow Plant | Direct sun (at least 4-6 hours) | Top-water only; moist in cool season, near-dry in summer | Pet-safe |
| Lamellate Vanda | Bright indirect light (just back from a sunny window) | Daily to every 2 days in active growth; every 3–4 days in cooler months | Pet-safe |
| Lance Brassia | Bright indirect light (just back from a sunny window) | Once or twice per week in active growth; reduce to every 10–14 days in cooler months | Pet-safe |
| Lance-leaf Liveforever | Bright indirect light (just back from a sunny window) | Every 10–14 days in winter and spring (active season); withhold almost entirely in summer | Pet-safe |
| Lance-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Lanceleaf Coreopsis | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry; weekly to establish, then rarely | Pet-safe |
| Langsat | Bright indirect light (just back from a sunny window) | 2–3 times per week; more frequently in dry season | Pet-safe |
| Lansberg's Restrepia | Bright indirect light (just back from a sunny window) | Every 2-4 days; evenly moist but not waterlogged | Pet-safe |
| Larch-leaved Sandwort | Direct sun (at least 4-6 hours) | Every 1–2 weeks in summer; minimal in winter | Pet-safe |
| large blue fescue | Direct sun (at least 4-6 hours) | Low to moderate; water every 7–10 days during active growth, monthly once established | Pet-safe |
| Large Cattleya | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth; every 14–21 days during the autumn-winter rest | Pet-safe |
| Large Chain Orchid | Bright indirect light (just back from a sunny window) | Every 5-7 days during active growth; reduce to every 10-14 days in winter | Pet-safe |
| Large-Bulb Bulbophyllum | Bright indirect light (just back from a sunny window) | Every 3–5 days in active growth; reduce slightly in cooler months | Pet-safe |
| Large-Cupped Billbergia | Bright indirect light (just back from a sunny window) | Every 7–10 days; keep central cup filled | Pet-safe |
| Large-flower Bulbophyllum | Bright indirect light (just back from a sunny window) | Water when the top of the medium begins to dry, approximately every 3-5 days | Pet-safe |
| large-flowered butterwort | Bright indirect light (just back from a sunny window) | Keep soil permanently damp during growing season; reduce but do not dry out completely in winter | Pet-safe |
| Large-Flowered Copiapoa | Direct sun (at least 4-6 hours) | Every 14-21 days in summer; once a month or dry in winter | Pet-safe |
| Large-Flowered Houseleek | Direct sun (at least 4-6 hours) | Low — drought-tolerant; water only in prolonged dry periods | Pet-safe |
| Large-Flowered Kohleria | Bright indirect light (just back from a sunny window) | When top 2 in (5 cm) are dry during the growing season; very sparingly in winter dormancy | Pet-safe |
| Large-Flowered Maxillaria | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 7–10 days in cooler months | Pet-safe |
| Large-Flowered Stanhopea | Bright indirect light (just back from a sunny window) | Frequently during growing season; reduce by half in winter | Pet-safe |
| Large-Leaf Lycaste | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 10–14 days in winter | Pet-safe |
| Large-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; much less in winter | Pet-safe |
| Large-perianth Goldfish Plant | Bright indirect light (just back from a sunny window) | When the top 2–3 cm of soil feels dry | Pet-safe |
| large-stalked sinningia | Bright indirect light (just back from a sunny window) | Every 7–14 days in active growth; withhold through dormancy | Pet-safe |
| Lau's Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 5-6 weeks in winter | Pet-safe |
| Lau's Turbinicarpus | Direct sun (at least 4-6 hours) | When soil is completely dry, approximately every 14-21 days in summer; minimal or no water in winter | Pet-safe |
| Laurustinus Viburnum | Direct sun (at least 4-6 hours) | Water when the top 5 cm of soil is dry; weekly while establishing, then occasional | Pet-safe |
| Lauterbach's Fan Palm | Bright indirect light (just back from a sunny window) | Every 5–7 days in growing season; every 10–14 days in cooler months | Pet-safe |
| Lavaglut Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week, more in heat | Pet-safe |
| Lavender Chirita | Bright indirect light (just back from a sunny window) | Every 5–7 days; keep evenly moist during active growth | Pet-safe |
| Lawes' Dendrobium | Bright indirect light (just back from a sunny window) | Freely in the growing season (every 2-4 days); reduce to very minimal in the dry winter rest | Pet-safe |
| Lawi Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring and summer, every 3–4 weeks in autumn and winter | Pet-safe |
| Lawn Pennywort | Bright indirect light (just back from a sunny window) | Fully submerged aquatic or marginal; keep substrate or water consistently moist | Pet-safe |
| Lawrence's Coelogyne | Bright indirect light (just back from a sunny window) | Every 5–7 days year-round; slightly less frequent in coolest winter months | Pet-safe |
| Lawrence's Coelogyne | Bright indirect light (just back from a sunny window) | Every 5-7 days during active growth; reduce to every 14-21 days in winter when temperatures are cooler | Pet-safe |
| Lead Plant | Direct sun (at least 4-6 hours) | Deeply once every 2–3 weeks during the first growing season; essentially no supplemental irrigation once established | Pet-safe |
| Leaf-Spined Brain Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-14 days during summer; once every 4-6 weeks in winter | Pet-safe |
| Leafy Orthophytum | Bright indirect light (just back from a sunny window) | When the top 3 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Lebanese Rosularia | Bright indirect light (just back from a sunny window) | Every 2–4 weeks in growing season; monthly or less in winter | Pet-safe |
| Lehmann's Ice Plant | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 10-14 days in spring-summer; very sparingly in winter (once every 3-4 weeks) | Pet-safe |
| Lehmann's Iceplant | Direct sun (at least 4-6 hours) | Every 2–3 weeks during spring and summer; monthly or less in winter | Pet-safe |
| Lemboglossum rossii | Bright indirect light (just back from a sunny window) | Water when the bark approaches dryness, roughly every 4-7 days, keeping pseudobulbs plump | Pet-safe |
| Lemon Button Fern | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 5-7 days | Pet-safe |
| Leopard Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Leopoldina Earth Star | Bright indirect light (just back from a sunny window) | Water when top 2 cm of soil dries, roughly every 7-10 days | Pet-safe |
| Lepismium Bolivianum | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| lesser bladderwort | Bright indirect light (just back from a sunny window) | Permanently submerged or floating in shallow standing water | Pet-safe |
| Lesser Pond Sedge | Direct sun (at least 4-6 hours) | Permanently wet; waterlogged soil or up to 20 cm of standing water | Pet-safe |
| Lesser Quaking Grass | Direct sun (at least 4-6 hours) | Water sparingly; keep soil evenly moist during germination and establishment | Pet-safe |
| Lesser Silver Saxifrage | Direct sun (at least 4-6 hours) | Low — water only when the top layer of grit is dry | Pet-safe |
| Lesser Water Plantain | Direct sun (at least 4-6 hours) | Saturated to 10 cm depth of water | Pet-safe |
| Levy's Huernia | Bright indirect light (just back from a sunny window) | Every 14–21 days during active growth (spring–autumn); once monthly or less in winter | Pet-safe |
| Liatris spicata | Direct sun (at least 4-6 hours) | When the top 3-4 cm is dry; roughly weekly while establishing | Pet-safe |
| Liatris spicata 'Kobold' | Direct sun (at least 4-6 hours) | When the top 3-4 cm is dry; about weekly while establishing | Pet-safe |
| Libon's Quesnelia | Bright indirect light (just back from a sunny window) | Keep the central tank filled with fresh water at all times; refresh every 1-2 weeks to prevent stagnation | Pet-safe |
| Lichang Chirita | Bright indirect light (just back from a sunny window) | Every 10–14 days | Pet-safe |
| Licorice Fern | Bright indirect light (just back from a sunny window) | Keep evenly moist while in active growth (fall through spring); water when the surface just begins to dry | Pet-safe |
| Licorice plant | Bright indirect light (just back from a sunny window) | Every 7–14 days; allow top 2–3 cm to dry | Pet-safe |
| Licuri Palm | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 10-14 days or less | Pet-safe |
| Lifelong Saxifrage | Bright indirect light (just back from a sunny window) | Water moderately; allow the top 2–3 cm of soil to dry before watering. | Pet-safe |
| Light Prince Goldfish Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days in spring and summer; every 10–14 days in autumn and winter | Pet-safe |
| Lilac Sage | Bright indirect light (just back from a sunny window) | Water when the top 5 cm of soil is dry | Pet-safe |
| Liliana's Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Lily Magnolia | Bright indirect light (just back from a sunny window) | Weekly during the growing season; reduce in autumn and winter | Pet-safe |
| Limestone Saxifrage | Direct sun (at least 4-6 hours) | Low — water sparingly, allow soil to approach dryness between waterings | Pet-safe |
| Linden's Canistrum | Bright indirect light (just back from a sunny window) | Keep the central tank filled with fresh water; water the root zone when the top 2-3 cm is dry, roughly every 7-10 days | Pet-safe |
| Lindley's Barkeria | Bright indirect light (just back from a sunny window) | Freely every 5-7 days in active growth; almost completely dry (once every 3-4 weeks) from leaf drop until new growth emerges | Pet-safe |
| Lion's Angraecum | Bright indirect light (just back from a sunny window) | Every 2–4 days in summer, every 7–10 days in winter | Pet-safe |
| Lion's Angraecum | Bright indirect light (just back from a sunny window) | When roots are silvery and the medium approaches dryness, roughly every 7-10 days in summer | Pet-safe |
| Lipstick Echeveria | Direct sun (at least 4-6 hours) | Every 1-2 weeks in spring/summer; sparingly in winter | Pet-safe |
| Lipstick Palm | Bright indirect light (just back from a sunny window) | Keep soil consistently moist — check every 3-4 days; water whenever the surface begins to dry | Pet-safe |
| Lipstick Plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm is dry, roughly every 7-10 days in growth | Pet-safe |
| Lipstick Plant 'Mona Lisa' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Lipstick Vine | Bright indirect light (just back from a sunny window) | When top 2–3 cm of compost feel dry | Pet-safe |
| Liriodendron tulipifera | Direct sun (at least 4-6 hours) | Deep soak weekly in the first two or three growing seasons, then rely on rainfall | Pet-safe |
| Lithops | Direct sun (at least 4-6 hours) | Follow the seasonal cycle, not a schedule | Pet-safe |
| Lithops Aucampiae | Direct sun (at least 4-6 hours) | Strictly seasonal: water in spring and autumn only, never in summer dormancy or mid-winter | Pet-safe |
| Lithops Bromfieldii | Direct sun (at least 4-6 hours) | Seasonally, only every few weeks during active growth and not at all during leaf renewal | Pet-safe |
| Lithops Divergens | Direct sun (at least 4-6 hours) | Only in autumn and spring growth, sparingly when soil is bone dry; no water during summer or mid-winter rest | Pet-safe |
| Lithops Hookeri | Direct sun (at least 4-6 hours) | Strictly seasonal: water in spring and autumn only, never during summer dormancy or mid-winter | Pet-safe |
| Lithops Julii | Bright indirect light (just back from a sunny window) | During spring and autumn growth only, roughly every 2-3 weeks; none in summer or winter | Pet-safe |
| Lithops Lesliei | Direct sun (at least 4-6 hours) | Strictly seasonal: water in spring and autumn only, never during summer dormancy or mid-winter | Pet-safe |
| Lithops Optica 'Rubra' | Bright indirect light (just back from a sunny window) | Sparingly in spring and autumn, every 2-3 weeks; withhold entirely in summer and winter | Pet-safe |
| Lithops Pseudotruncatella | Direct sun (at least 4-6 hours) | Very infrequently, following the seasonal cycle rather than a fixed schedule | Pet-safe |
| Lithops Salicola | Bright indirect light (just back from a sunny window) | Only during active growth (autumn and spring), roughly every 2-3 weeks; none in summer or deep winter | Pet-safe |
| Little Bluestem | Direct sun (at least 4-6 hours) | Every 2–3 weeks during establishment; minimal once established | Pet-safe |
| Little Bunny Fountain Grass | Direct sun (at least 4-6 hours) | Weekly while establishing in the first season, then only during prolonged drought | Pet-safe |
| Little Calyx Aechmea | Bright indirect light (just back from a sunny window) | Every 7–10 days in growing season | Pet-safe |
| Little Gem Magnolia | Direct sun (at least 4-6 hours) | Weekly while establishing (1–3 years); deep watering in summer drought thereafter | Pet-safe |
| Little Gem Spruce | Direct sun (at least 4-6 hours) | Every 5-7 days; keep the small root zone evenly moist, watering when the surface dries | Pet-safe |
| Little One Temple Bells | Bright indirect light (just back from a sunny window) | Every 5–7 days while growing; withhold completely during dormancy | Pet-safe |
| little silver spider grass | Direct sun (at least 4-6 hours) | Every 7–10 days during the growing season; reduce significantly in winter | Pet-safe |
| Living Rock Cactus | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 21-30 days in summer; essentially none in winter | Pet-safe |
| Living Stones | Direct sun (at least 4-6 hours) | Very infrequently and strictly by season, often only every few weeks and not at all in summer or deep winter | Pet-safe |
| Livistona Decipiens | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Livistona Rotundifolia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Lobb's Bulbophyllum | Bright indirect light (just back from a sunny window) | When the top of the medium or slab begins to dry, approximately every 4-7 days; reduce slightly in winter | Pet-safe |
| Lobed Tickseed | Bright indirect light (just back from a sunny window) | Low to moderate; drought-tolerant but benefits from occasional watering | Pet-safe |
| Lobivia famatimensis | Direct sun (at least 4-6 hours) | Water thoroughly when the mix dries out, roughly every 1-2 weeks in summer; keep dry through winter | Pet-safe |
| Loblolly Pine Bonsai | Direct sun (at least 4-6 hours) | When the top 2-3 cm is dry, commonly daily in summer and every 3-5 days in cool weather | Pet-safe |
| Lobster Flower | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in summer; monthly or less in winter | Pet-safe |
| Long Spider Orchid | Bright indirect light (just back from a sunny window) | Every 3–4 days in active growth; every 2–3 weeks in winter | Pet-safe |
| Long-Flowered Bulbophyllum | Bright indirect light (just back from a sunny window) | Every 3–5 days in active growth (late spring to autumn); reduced in autumn and winter | Pet-safe |
| Long-Haired Zygopetalum | Bright indirect light (just back from a sunny window) | Every 3–4 days in growth, reduce to weekly in winter | Pet-safe |
| Long-Horned Ginger Lily | Bright indirect light (just back from a sunny window) | Water frequently during active growth, allowing the medium to drain thoroughly after each watering; reduce in cooler months | Pet-safe |
| Long-Leaf Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season, monthly in winter | Pet-safe |
| Long-Leaved Pachyphytum | Direct sun (at least 4-6 hours) | Every 2–3 weeks in spring and summer; every 4–6 weeks in autumn and winter | Pet-safe |
| Long-leaved speedwell | Direct sun (at least 4-6 hours) | Weekly during the growing season; reduce in winter | Pet-safe |
| Long-Petaled Deuterocohnia | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer; monthly or less in winter | Pet-safe |
| Long-stalk Goldfish Plant | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry | Pet-safe |
| Long-Stalked Cranesbill | Direct sun (at least 4-6 hours) | Low; tolerates extended dry periods | Pet-safe |
| Long-stamen Sage | Direct sun (at least 4-6 hours) | Every 10–14 days once established | Pet-safe |
| Long-stamened Sage | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil dries out, roughly every 5-8 days in summer | Pet-safe |
| Longleaf Phlox | Direct sun (at least 4-6 hours) | Every 14–21 days when establishing; minimal supplemental water once established | Pet-safe |
| Lorentz's Deuterocohnia | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 14-21 days in the growing season; minimal in winter | Pet-safe |
| Loulu Palm | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-14 days | Pet-safe |
| Loving Touch Miniature Rose | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, about every 2-4 days in summer | Pet-safe |
| Low's Cymbidium | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce in winter | Pet-safe |
| Low's Cymbidium | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of the compost is dry, roughly every 5-7 days in active growth | Pet-safe |
| Lowii Pitcher Plant | Bright indirect light (just back from a sunny window) | Keep mix moist, watering every few days; never let it dry out or stand flooded | Pet-safe |
| Luzon Vanda | Bright indirect light (just back from a sunny window) | Daily to every 2 days in active growth; reduce slightly in cooler months | Pet-safe |
| Lycaste aromatica | Bright indirect light (just back from a sunny window) | Every 4-6 days while in leaf; sparingly once leaves drop | Pet-safe |
| Lycaste cruenta | Bright indirect light (just back from a sunny window) | Water freely 2-3 times weekly in summer growth; withhold almost entirely during winter dormancy | Pet-safe |
| Lycaste deppei | Bright indirect light (just back from a sunny window) | Water generously 2-3 times weekly through summer; keep nearly dry through winter dormancy | Pet-safe |
| Lycaste skinneri | Bright indirect light (just back from a sunny window) | Every 5-7 days in active growth; reduce sharply after leaf drop, roughly every 2-3 weeks in winter rest | Pet-safe |
| Lydian Stonecrop | Direct sun (at least 4-6 hours) | Every 2–3 weeks in summer; monthly or less in winter | Pet-safe |
| Lyme Grass | Direct sun (at least 4-6 hours) | Low; drought-tolerant once established | Pet-safe |
| MacGillivray's Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in summer, very sparingly in winter | Pet-safe |
| Macho Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, often every 4-7 days | Pet-safe |
| Mackay's Zygopetalum | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is nearly dry, roughly every 5-7 days | Pet-safe |
| Mackay's Zygopetalum | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of the mix is dry, roughly every 7-10 days in summer | Pet-safe |
| Madagascar Jasmine | Bright indirect light (just back from a sunny window) | When the top 2-3cm of soil starts to dry (spring-summer); sparingly in winter | Pet-safe |
| Madagascar Sundew | Direct sun (at least 4-6 hours) | Continuously — maintain 1–3 cm of water in a tray year-round during active growth; reduce tray depth in winter. | Pet-safe |
| Madame Alfred Carriere Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly when establishing; mature plants when the top few centimetres of soil dry, and they tolerate some drought | Pet-safe |
| Madame Butterfly snapdragon | Direct sun (at least 4-6 hours) | Every 5–7 days; keep evenly moist | Pet-safe |
| Madame Lemoine Lilac | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 10-14 days; established plants are drought-tolerant | Pet-safe |
| Madison's Matucana | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, every 10-14 days in summer | Pet-safe |
| Madonna White Snapdragon | Direct sun (at least 4-6 hours) | When the top 2–3 cm of soil is dry, roughly every 5–7 days | Pet-safe |
| Magdalene Angraecum | Bright indirect light (just back from a sunny window) | Regular watering spring–autumn; reduce markedly in winter | Pet-safe |
| Magdalene's Angraecum | Bright indirect light (just back from a sunny window) | Every 5-7 days in active growth; reduce to every 14-21 days in winter | Pet-safe |
| Magnificent Columnea | Bright indirect light (just back from a sunny window) | Every 4–7 days during active growth; every 10–14 days in winter | Pet-safe |
| Magnificent Inula | Bright indirect light (just back from a sunny window) | 2-3 times per week; tolerates moist to wet conditions | Pet-safe |
| Magnolia 'Elizabeth' | Direct sun (at least 4-6 hours) | Weekly during the first few years and in summer droughts | Pet-safe |
| Magnolia 'Jane' | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the first two years, then during dry spells | Pet-safe |
| Magnolia 'Susan' | Direct sun (at least 4-6 hours) | Keep moist while establishing; water deeply weekly in dry spells for the first few years | Pet-safe |
| Magnolia grandiflora 'Gallissonnière' | Direct sun (at least 4-6 hours) | Weekly deep watering in the first 2-3 years, then only during prolonged dry spells | Pet-safe |
| Magnolia wilsonii | Bright indirect light (just back from a sunny window) | Weekly while establishing and during dry summer spells | Pet-safe |
| Maiden Grass | Direct sun (at least 4-6 hours) | Weekly during the first growing season; every 2–3 weeks once established | Pet-safe |
| Maidenhair Spleenwort | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Maikai Orchid | Bright indirect light (just back from a sunny window) | Every 5–7 days; allow medium to dry out between waterings | Pet-safe |
| Maire's fescue | Direct sun (at least 4-6 hours) | Low; water every 2–3 weeks during dry spells; once established, relies on natural rainfall in most temperate climates | Pet-safe |
| Majesty palm | Bright indirect light (just back from a sunny window) | Keep soil consistently moist, every 4-7 days | Pet-safe |
| Malepartus silver grass | Direct sun (at least 4-6 hours) | Weekly during the growing season; reduce in autumn; minimal in winter | Pet-safe |
| Maltese cross | Direct sun (at least 4-6 hours) | Every 5–7 days in the growing season; less in cool or wet periods | Pet-safe |
| Mammillaria bombycina | Direct sun (at least 4-6 hours) | Water thoroughly when the soil is fully dry, roughly every 1-2 weeks in summer; keep nearly dry in winter | Pet-safe |
| Mammillaria mystax | Direct sun (at least 4-6 hours) | Water deeply when the mix is completely dry, about every 1-2 weeks in summer; keep dry in winter | Pet-safe |
| Mandaianum Blue Star Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Manna Ash | Direct sun (at least 4-6 hours) | Low to moderate; drought-tolerant once established | Pet-safe |
| Many Fingers | Direct sun (at least 4-6 hours) | Every 2 weeks in spring and summer; every 4–6 weeks in autumn and winter | Pet-safe |
| Many-Coloured Zygopetalum | Bright indirect light (just back from a sunny window) | When the surface is approaching dry, roughly every 4-6 days; more often if mounted | Pet-safe |
| Many-Flowered Air Plant | Bright indirect light (just back from a sunny window) | Mist 1–2 times per week, or a 20-minute soak every 1–2 weeks | Pet-safe |
| Many-Flowered Catopsis | Bright indirect light (just back from a sunny window) | Maintain water in the central cup; top up every 5-7 days | Pet-safe |
| Many-Flowered Epidendrum | Bright indirect light (just back from a sunny window) | 2–3 times per week during active growth; allow slight drying between waterings | Pet-safe |
| Many-flowered Masdevallia | Bright indirect light (just back from a sunny window) | Daily in warm weather; every 3–5 days in cooler months | Pet-safe |
| Many-Flowered Racinaea | Bright indirect light (just back from a sunny window) | Mist thoroughly 2-3 times per week; allow to dry slightly between mistings | Pet-safe |
| Many-Flowered Rush | Direct sun (at least 4-6 hours) | Frequent to constant — prefers permanently moist to wet soil | Pet-safe |
| Many-haired Draba | Direct sun (at least 4-6 hours) | Every 10–14 days during growth; almost dry in winter | Pet-safe |
| Many-Headed Barrel Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and essentially none in winter | Pet-safe |
| Many-Leaved Monanthes | Bright indirect light (just back from a sunny window) | Every 1–2 weeks in the growing season; reduced in summer heat | Pet-safe |
| Many-Nippled Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, approximately every 10-14 days in summer; once every 4-6 weeks in winter | Pet-safe |
| Many-Stemmed Air Plant | Bright indirect light (just back from a sunny window) | Soak for 30 minutes 2–3 times per week, or mist daily | Pet-safe |
| Many-stemmed Liveforever | Direct sun (at least 4-6 hours) | Every 2–3 weeks autumn through late spring; none in summer | Pet-safe |
| Maranta 'Fascinator' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Maranta 'Kim' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 5-7 days in growth | Pet-safe |
| Maranta 'Lemon Lime' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm (about the top inch) of soil dries out, often roughly weekly | Pet-safe |
| Maranta 'Marisela' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 5-7 days in growth | Pet-safe |
| Maranta 'Massangeana' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 5-7 days in growth | Pet-safe |
| Maranta 'Silver Band' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 5-7 days in growth | Pet-safe |
| Maranta Cristata | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Marble Bromeliad | Bright indirect light (just back from a sunny window) | Refresh central cup weekly; water soil every 2–3 weeks | Pet-safe |
| Marble Houseleek | Direct sun (at least 4-6 hours) | Every 2–4 weeks in growing season; once a month or less in winter | Pet-safe |
| Marbled Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during the autumn-to-spring active period; completely dry in summer | Pet-safe |
| Marbled Living Stones | Direct sun (at least 4-6 hours) | Seasonally — water only in autumn during new-leaf emergence (September–November); completely dry rest of year | Pet-safe |
| Margaret's Corkscrew Plant | Bright indirect light (just back from a sunny window) | Keep medium permanently moist to wet; tray method with 1 cm water during growing season | Pet-safe |
| Margined Copiapoa | Direct sun (at least 4-6 hours) | When the soil is completely dry throughout, roughly every 14-21 days in summer; monthly or less in winter | Pet-safe |
| Margined Saxifrage | Bright indirect light (just back from a sunny window) | Every 7–10 days when growing; very sparingly in winter | Pet-safe |
| Marie's Davallia | Bright indirect light (just back from a sunny window) | Every 5–10 days in the growing season; minimal in winter dormancy | Pet-safe |
| Marram Grass | Direct sun (at least 4-6 hours) | Low; drought-tolerant | Pet-safe |
| Marshall's Thunia | Bright indirect light (just back from a sunny window) | Water freely every 2-4 days during vigorous summer growth; reduce sharply from autumn as leaves yellow, then keep almost dry (monthly) through winter dormancy | Pet-safe |
| Marson's Crown Cactus | Direct sun (at least 4-6 hours) | Every 7-14 days in active growth; once every 4-6 weeks in winter | Pet-safe |
| Marson's Gymnocalycium | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days in summer; monthly or less in winter | Pet-safe |
| Martius Fan Palm | Direct sun (at least 4-6 hours) | Weekly during establishment; once established, every 2–3 weeks depending on rainfall | Pet-safe |
| Martius's Brassavola | Bright indirect light (just back from a sunny window) | Every 5–7 days during growing season; reduce in winter after flowering | Pet-safe |
| Martius's Stanhopea | Bright indirect light (just back from a sunny window) | 3–5 times per week in summer; sharply reduce in winter | Pet-safe |
| Mary's Prosthechea | Bright indirect light (just back from a sunny window) | Every 5-7 days in growth; every 14-21 days in winter | Pet-safe |
| Masters' Larch | Direct sun (at least 4-6 hours) | Weekly during first 2 years; monthly once established | Pet-safe |
| Mato Grosso Milfoil | Direct sun (at least 4-6 hours) | Permanently submerged aquatic stem plant | Pet-safe |
| Matsumoto Mix aster | Direct sun (at least 4-6 hours) | 2–3 times per week in warm weather; reduce in cool or overcast periods | Pet-safe |
| Matted Sea Lavender | Direct sun (at least 4-6 hours) | Every 2–3 weeks; very sparingly in winter | Pet-safe |
| Matthiola incana 'Giant Imperial Mix' | Direct sun (at least 4-6 hours) | Keep evenly moist; water every 3-5 days, adjusting to weather | Pet-safe |
| Matthiola incana 'Katz Sakura' | Direct sun (at least 4-6 hours) | Keep soil evenly moist; water every 3-5 days, more in heat | Pet-safe |
| Maughan's Cone Plant | Direct sun (at least 4-6 hours) | Every 2–4 weeks in autumn growth phase; none during summer dormancy | Pet-safe |
| Maughan's Cone Plant | Direct sun (at least 4-6 hours) | Every 3–4 weeks during the autumn–winter–spring growing period; none from June to late August | Pet-safe |
| Maury's Air Plant | Direct sun (at least 4-6 hours) | Mist or soak every 10–14 days | Pet-safe |
| Maxillaria tenuifolia | Bright indirect light (just back from a sunny window) | When the medium is approaching dryness, roughly every 4-6 days in growth | Pet-safe |
| Maxillaria variabilis | Bright indirect light (just back from a sunny window) | When the medium nears dryness, about every 4-6 days in growth | Pet-safe |
| Maxima Pitcher Plant | Bright indirect light (just back from a sunny window) | Keep mix moist, watering every few days; not standing in deep water | Pet-safe |
| Maximilian Sunflower | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; minimal supplemental irrigation needed | Pet-safe |
| May Night Salvia | Direct sun (at least 4-6 hours) | When top 3-5 cm of soil is dry, roughly every 7-10 days once established | Pet-safe |
| McDowell's Thelocactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 14-21 days in summer; once a month or less in winter. | Pet-safe |
| MD-2 Gold Pineapple | Direct sun (at least 4-6 hours) | Water when the top 3-5 cm of soil dries out, roughly every 7-10 days | Pet-safe |
| Meadow Blazing Star | Direct sun (at least 4-6 hours) | Keep evenly moist to medium; water during dry spells | Pet-safe |
| meadow fountain grass | Direct sun (at least 4-6 hours) | Weekly when new; every 2–3 weeks once established | Pet-safe |
| Meadow Oat Grass | Direct sun (at least 4-6 hours) | Low; very drought-tolerant | Pet-safe |
| Meadow Saxifrage | Bright indirect light (just back from a sunny window) | Every 5–7 days in spring; minimal watering needed from midsummer onward | Pet-safe |
| Mealy-cup Sage | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 5-7 days when young; every 10-14 days once established | Pet-safe |
| Mealycup Sage 'Victoria Blue' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry; roughly weekly, less once established | Pet-safe |
| Mediterranean Fan Palm | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, roughly every 10-14 days in summer | Pet-safe |
| Mediterranean feather grass | Direct sun (at least 4-6 hours) | Every 3–4 weeks once established; minimal in winter | Pet-safe |
| Mediterranean Sea Holly | Direct sun (at least 4-6 hours) | Low — water young plants to establish, then rely on rainfall | Pet-safe |
| Medusa Habenaria | Bright indirect light (just back from a sunny window) | Keep evenly moist during active growth, roughly every 3-5 days | Pet-safe |
| Mendoza Graptopetalum | Bright indirect light (just back from a sunny window) | When the soil is completely dry, roughly every 10-14 days in summer | Pet-safe |
| Merrill's Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in summer, every 14–21 days in winter | Pet-safe |
| Metallic Peperomia | Bright indirect light (just back from a sunny window) | Roughly every 1-2 weeks; when the top 2-3 cm (1 in) of soil is dry | Pet-safe |
| Mexican Achimenes | Bright indirect light (just back from a sunny window) | Consistently moist throughout the growing season (spring–autumn); dry in winter dormancy | Pet-safe |
| Mexican Aechmea | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (soil); refresh central tank monthly | Pet-safe |
| Mexican Blue Palm | Direct sun (at least 4-6 hours) | When the top 5-8 cm of soil is dry, roughly every 10-14 days in summer; reduce to every 3-4 weeks in winter | Pet-safe |
| Mexican Fence Post Cactus | Direct sun (at least 4-6 hours) | When the top half of soil is dry, roughly every 10-14 days in summer; every 4-6 weeks in winter | Pet-safe |
| Mexican Fleabane | Direct sun (at least 4-6 hours) | Every 10–14 days during active growth; minimal once established | Pet-safe |
| Mexican Hat | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; very drought-tolerant | Pet-safe |
| Mexican Lime Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and every 4-6 weeks in winter | Pet-safe |
| Mexican Orange Sage | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil dries out, roughly every 5-8 days during the growing season | Pet-safe |
| Mexican Pincushion | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 10-14 days in summer and once a month or less in winter | Pet-safe |
| Mexican Sage | Direct sun (at least 4-6 hours) | Weekly during active growth | Pet-safe |
| Mexican Snowball | Bright indirect light (just back from a sunny window) | Every 2-3 weeks in spring/summer; roughly monthly in winter | Pet-safe |
| Mexican Tree Fern | Bright indirect light (just back from a sunny window) | 2-3 times per week; keep trunk moist | Pet-safe |
| Mexican zinnia | Direct sun (at least 4-6 hours) | Once or twice weekly; allow the top 2–3 cm of soil to dry between waterings | Pet-safe |
| Meyer's Cape Primrose | Bright indirect light (just back from a sunny window) | Every 10-14 days in growth; every 4-6 weeks in winter | Pet-safe |
| Meyer's Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks from late summer (August/September) through autumn; withheld completely from May to August | Pet-safe |
| Microsorum punctatum | Bright indirect light (just back from a sunny window) | Water when the top 2-3 cm of mix feels dry, roughly every 5-9 days | Pet-safe |
| Midas Touch Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly during growth | Pet-safe |
| Middendorf Weigela | Bright indirect light (just back from a sunny window) | Every 7 days during dry periods; keep evenly moist but not waterlogged | Pet-safe |
| Mignonette | Direct sun (at least 4-6 hours) | Every 5–7 days; do not allow to dry out completely | Pet-safe |
| Mignonette Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 2–3 weeks in winter | Pet-safe |
| Milky bellflower | Direct sun (at least 4-6 hours) | Weekly during dry periods; moderate water requirements | Pet-safe |
| Milky Way Kousa Dogwood | Bright indirect light (just back from a sunny window) | Weekly while establishing; deep watering in summer drought | Pet-safe |
| Miller's Laelia | Direct sun (at least 4-6 hours) | Every 3–5 days in summer; very sparse in winter (monthly or less) | Pet-safe |
| Miller's Laelia | Bright indirect light (just back from a sunny window) | When the pot is almost completely dry, roughly every 7-14 days in summer | Pet-safe |
| Million Bells 'Superbells' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry — let it dry slightly between waterings | Pet-safe |
| Miltonia Orchid | Bright indirect light (just back from a sunny window) | Every 2-5 days in active growth; let medium approach dryness, never bone-dry | Pet-safe |
| Min Fir | Direct sun (at least 4-6 hours) | Regularly during establishment; moderate thereafter | Pet-safe |
| Mini Moth Orchid 'Sogo Vivien' | Bright indirect light (just back from a sunny window) | Roughly every 7-10 days, when the bark mix is nearly dry and roots turn silvery-grey | Pet-safe |
| Miniature African violet | Bright indirect light (just back from a sunny window) | Every 5–8 days | Pet-safe |
| Miniature Chusan Palm | Bright indirect light (just back from a sunny window) | Weekly in the growing season, reduced in winter | Pet-safe |
| Miniature Cone Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days during active growth (autumn–spring); completely dry through summer dormancy | Pet-safe |
| Miniature Coral Berry Bromeliad | Bright indirect light (just back from a sunny window) | Every 7–14 days | Pet-safe |
| Miniature Desert Rose | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; once a month or less in winter | Pet-safe |
| Miniature Sinningia | Bright indirect light (just back from a sunny window) | Keep evenly, lightly moist at all times; check every few days | Pet-safe |
| Miniature Sugar Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer; every 14 days in winter | Pet-safe |
| Miniature Tree Fern | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Minor Sun Pitcher | Bright indirect light (just back from a sunny window) | Water every 3-5 days to keep the substrate consistently moist; maintain partial pitcher fill with distilled water | Pet-safe |
| Miquel's Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Miss Grace Dawn Redwood | Direct sun (at least 4-6 hours) | Weekly or more in dry periods; tolerates wet soils | Pet-safe |
| Miss Willmott's Ghost | Direct sun (at least 4-6 hours) | Low — once established, water only during prolonged drought | Pet-safe |
| Missouri Foxtail Cactus | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, roughly every 10-21 days in summer; virtually none in winter | Pet-safe |
| Mister Lincoln Rose | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week, more in heat | Pet-safe |
| Mistletoe cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in growth | Pet-safe |
| Mitchell's Pitcher Plant | Direct sun (at least 4-6 hours) | Tray method, seasonally adjusted | Pet-safe |
| Mitla Air Plant | Direct sun (at least 4-6 hours) | Water 1–3 times per week depending on season | Pet-safe |
| Modoc Cypress | Direct sun (at least 4-6 hours) | Minimal once established; drought-tolerant | Pet-safe |
| Momi Fir | Direct sun (at least 4-6 hours) | Moderate; water regularly during establishment | Pet-safe |
| Mona Lisa Lipstick Plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in active growth; every 14 days in cooler months | Pet-safe |
| Monarch Birch | Direct sun (at least 4-6 hours) | Regular watering for first 2–3 years; moderate once established | Pet-safe |
| Money Plant Spurflower | Bright indirect light (just back from a sunny window) | Water when the top 2 cm of compost feels dry, roughly every 5–8 days indoors | Pet-safe |
| Money tree | Bright indirect light (just back from a sunny window) | When the top 3 cm of soil is dry, every 7-14 days | Pet-safe |
| Mongolian Linden | Bright indirect light (just back from a sunny window) | Weekly during establishment; every 2 weeks in dry summers | Pet-safe |
| Monk's Hood Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 2-3 weeks in the growing season; keep dry in winter | Pet-safe |
| Monk's Hood Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, every 10-14 days in summer; every 4-6 weeks or less in winter | Pet-safe |
| Monkey Jack | Direct sun (at least 4-6 hours) | Water young trees 2–3 times per week; established trees are moderately drought-tolerant and generally managed on natural rainfall in tropical climates. | Pet-safe |
| Monstrose Apple Cactus | Direct sun (at least 4-6 hours) | When the mix is dry, roughly every 10-14 days in summer; minimal in winter | Pet-safe |
| Montezuma Cypress | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water deeply every 7-14 days, more frequently in heat | Pet-safe |
| Moon Cactus | Bright indirect light (just back from a sunny window) | Only when the mix is fully dry, roughly every 10-14 days in summer and far less in winter | Pet-safe |
| Moon Cactus | Bright indirect light (just back from a sunny window) | Every 14–21 days in spring/summer; every 4–6 weeks in autumn; almost none in winter | Pet-safe |
| Moon Valley Pilea | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Moonlight Cactus | Bright indirect light (just back from a sunny window) | When the top few centimetres are dry, roughly weekly in summer and around monthly in winter | Pet-safe |
| Moons Chirita | Bright indirect light (just back from a sunny window) | Every 7–10 days | Pet-safe |
| Moonstones | Bright indirect light (just back from a sunny window) | Every 2 to 3 weeks in active growth; roughly monthly or less in winter | Pet-safe |
| Moor Witch Purple Moor Grass | Bright indirect light (just back from a sunny window) | Moderate to frequent — prefers reliably moist soil; dislikes drought | Pet-safe |
| Moorcroft's Sage | Direct sun (at least 4-6 hours) | Moderate during growth; minimal in winter | Pet-safe |
| Moore's Coelogyne | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 10–14 days in winter | Pet-safe |
| Moore's Coelogyne | Bright indirect light (just back from a sunny window) | Every 5-7 days in the growing season; every 14-21 days in winter | Pet-safe |
| Morelia Miltonia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of the mix feels barely moist, roughly every 6-8 days in summer | Pet-safe |
| Morell's Billbergia | Bright indirect light (just back from a sunny window) | Keep central cup filled; water substrate every 1-2 weeks | Pet-safe |
| Morning Light Maiden Grass | Direct sun (at least 4-6 hours) | Weekly for the first growing season; every 2–3 weeks once established | Pet-safe |
| Moroccan Sea Holly | Direct sun (at least 4-6 hours) | Low — drought-tolerant once established, water sparingly in winter | Pet-safe |
| Moser's Gymnocalycium | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, approximately every 7-10 days in summer; every 4-6 weeks in winter | Pet-safe |
| Moso Bamboo | Direct sun (at least 4-6 hours) | 2–3 times per week in the growing season; weekly in winter | Pet-safe |
| Mosquito Plant | Direct sun (at least 4-6 hours) | Every 7–14 days once established; more frequent when young | Pet-safe |
| Moss Campion | Direct sun (at least 4-6 hours) | Sparingly in summer; almost none in winter | Pet-safe |
| Moss Phlox | Direct sun (at least 4-6 hours) | Moderate — water during establishment and dry spells | Pet-safe |
| Moss-Leaf Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Mossy cassiope | Bright indirect light (just back from a sunny window) | Consistently moist; never allow soil to dry out | Pet-safe |
| Mossy Saxifrage | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth; reduce in summer heat and winter | Pet-safe |
| Moth orchid | Bright indirect light (just back from a sunny window) | Roughly weekly; let the bark approach dryness first | Pet-safe |
| Moth Orchid | Bright indirect light (just back from a sunny window) | When the bark mix is nearly dry, typically every 7-10 days | Pet-safe |
| Mother of Hundreds | Direct sun (at least 4-6 hours) | Every 10-14 days in spring-summer when the top 3 cm of soil is dry; every 4-6 weeks in autumn and winter | Pet-safe |
| Moudry Black Fountain Grass | Direct sun (at least 4-6 hours) | Weekly during establishment, then occasional deep watering in dry spells | Pet-safe |
| Mount Lewis King Palm | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Mountain Alyssum | Direct sun (at least 4-6 hours) | Every 14–21 days during growth; minimal in winter | Pet-safe |
| Mountain Bluebells | Bright indirect light (just back from a sunny window) | Water deeply 2–3 times per week; does not tolerate drying out | Pet-safe |
| Mountain Cornflower | Direct sun (at least 4-6 hours) | Weekly in the first season; established plants are drought-tolerant and rarely need watering | Pet-safe |
| Mountain Desert Sage | Direct sun (at least 4-6 hours) | Very low once established; xeric to moderate | Pet-safe |
| Mountain Everlasting | Direct sun (at least 4-6 hours) | Every 2–3 weeks during growing season; minimal in winter | Pet-safe |
| Mountain Hemlock | Direct sun (at least 4-6 hours) | Weekly during establishment; relies on rainfall and snowmelt once established | Pet-safe |
| Mountain Pansy | Bright indirect light (just back from a sunny window) | Water sparingly; allow soil to partially dry between waterings. | Pet-safe |
| Mountain Sandwort | Direct sun (at least 4-6 hours) | Weekly during establishment; drought-tolerant once established | Pet-safe |
| Mountain Sweet Pitcher Plant | Direct sun (at least 4-6 hours) | Tray method, moist year-round | Pet-safe |
| Mountain Turk's Cap | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-14 days in summer; every 3-4 weeks in winter | Pet-safe |
| Mountain Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in the growing season, every 14–21 days in winter | Pet-safe |
| Mouse-Tail Air Plant | Bright indirect light (just back from a sunny window) | Mist or soak every 10–14 days | Pet-safe |
| Mrs D.F. Maxwell Cornish heath | Direct sun (at least 4-6 hours) | Weekly while establishing; every 2–3 weeks once established | Pet-safe |
| Muir's Rhinephyllum | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in spring–summer; minimal in winter | Pet-safe |
| Muir's Sage | Direct sun (at least 4-6 hours) | Low; drought tolerant once established | Pet-safe |
| Mule-Ear Oncidium | Bright indirect light (just back from a sunny window) | When roots approach dry, about every 4-6 days year-round | Pet-safe |
| Munstead Wood Rose | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week, more in heat | Pet-safe |
| Muscari 'White Magic' | Direct sun (at least 4-6 hours) | Rainfall in most settings; water in dry spring spells | Pet-safe |
| Muscari armeniacum | Direct sun (at least 4-6 hours) | Rainfall in most settings; water in dry spring spells | Pet-safe |
| Musk Mallow | Direct sun (at least 4-6 hours) | Low to moderate once established | Pet-safe |
| Mutton Bird Sedge | Bright indirect light (just back from a sunny window) | Moderate to regular; do not allow to dry out in the growing season | Pet-safe |
| Myretoun Ruby winter heath | Direct sun (at least 4-6 hours) | Weekly for new plants in the first season; every 2–3 weeks for established plants during dry spells | Pet-safe |
| Mysore trumpetvine | Bright indirect light (just back from a sunny window) | Regularly during growth; reduced in winter | Pet-safe |
| Mystacid Aerangis | Bright indirect light (just back from a sunny window) | When roots appear silvery-white and the top of the medium is dry, roughly every 5-8 days | Pet-safe |
| Nahoum's Alcantarea | Direct sun (at least 4-6 hours) | Refill the central tank every 7-10 days; water substrate sparingly — only when completely dry | Pet-safe |
| Nam Doc Mai Mango | Direct sun (at least 4-6 hours) | Deep watering when the top 5 cm of soil dries, roughly every 5-10 days in growth | Pet-safe |
| Namaqualand Cheiridopsis | Direct sun (at least 4-6 hours) | Every 2–3 weeks during autumn through early spring; completely dry June–August | Pet-safe |
| Namaqualand Sage | Direct sun (at least 4-6 hours) | Low; sparingly once established | Pet-safe |
| Nance | Direct sun (at least 4-6 hours) | Every 14–21 days; highly drought-tolerant when established | Pet-safe |
| Nardoo | Direct sun (at least 4-6 hours) | Aquatic — grow permanently in shallow water 5–15 cm deep, or in waterlogged pond margin soil | Pet-safe |
| narrow small-reed | Direct sun (at least 4-6 hours) | Keep constantly moist to wet; suited to boggy, saturated, or seasonally flooded soils | Pet-safe |
| Narrow-Leaf Coneflower | Direct sun (at least 4-6 hours) | Water to establish in year one, then only in prolonged drought | Pet-safe |
| Narrow-leaf Zinnia | Direct sun (at least 4-6 hours) | When top 3-4 cm of soil is dry, roughly every 5-10 days | Pet-safe |
| Narrow-Leaved Ash | Direct sun (at least 4-6 hours) | Low to moderate; drought-tolerant once established | Pet-safe |
| Narrow-Leaved Evening Primrose | Direct sun (at least 4-6 hours) | Every 10–14 days; very drought-tolerant once established | Pet-safe |
| Narrow-leaved Gentian | Bright indirect light (just back from a sunny window) | Moderate; allow the top centimetre of soil to dry between waterings | Pet-safe |
| Narvaez Crown Cactus | Direct sun (at least 4-6 hours) | Every 10-14 days in summer; once a month or less in winter | Pet-safe |
| Nasturtium | Direct sun (at least 4-6 hours) | Weekly watering | Pet-safe |
| Natal Plum Bonsai | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-6 days in growth | Pet-safe |
| Natal Sundew | Direct sun (at least 4-6 hours) | Keep in a shallow tray of 1–2 cm pure water throughout the growing season; allow the tray to dry briefly in winter during dormancy. | Pet-safe |
| Naumann's Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in growing season; less in winter | Pet-safe |
| Naureen's Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during the active autumn-to-spring period; completely dry in summer | Pet-safe |
| Nearly Wild Rose | Direct sun (at least 4-6 hours) | Deeply once a week, more in heat | Pet-safe |
| Neblina Sun Pitcher | Bright indirect light (just back from a sunny window) | Keep medium consistently moist; flush pitchers with pure water weekly | Pet-safe |
| Nedda's Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in growing season; reduce to every 3–4 weeks in winter | Pet-safe |
| Neglected Air Plant | Bright indirect light (just back from a sunny window) | Soak for 30 minutes to 2 hours once a week | Pet-safe |
| Nejapa Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer; once every 5-8 weeks in winter | Pet-safe |
| Nematanthus 'Cheerio' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Nematanthus 'Freckles' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Nematanthus 'Tropicana' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Nematanthus wettsteinii | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Nemesia 'Sunsatia Cranberry' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, roughly every 2-3 days in warm weather | Pet-safe |
| Nemesia strumosa 'Poetry Blue' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, roughly every 2-3 days in warm weather | Pet-safe |
| Neoregelia 'Charm' | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Neoregelia 'Fireball' | Bright indirect light (just back from a sunny window) | Keep the central cup filled; water the mix when the top 2-3 cm is dry | Pet-safe |
| Neoregelia 'Painted Lady' | Bright indirect light (just back from a sunny window) | Keep the central cup filled; refresh weekly and water mix when top 2-3 cm dry | Pet-safe |
| Neoregelia ampullacea | Bright indirect light (just back from a sunny window) | Keep the small cups topped up; mist or dip mounted plants every few days | Pet-safe |
| Neoregelia concentrica | Bright indirect light (just back from a sunny window) | Keep the broad central cup filled; refresh weekly and water mix when top few cm are dry | Pet-safe |
| Neoregelia cruenta | Bright indirect light (just back from a sunny window) | Keep the central cup filled; refresh weekly and water the mix when the top few cm dry out | Pet-safe |
| Neoregelia spectabilis | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; refresh it weekly and water the mix when the top 2-3 cm is dry | Pet-safe |
| Nepenthes 'Miranda' | Bright indirect light (just back from a sunny window) | Keep media constantly moist; water every 2-4 days with mineral-free water | Pet-safe |
| Nepenthes ampullaria | Bright indirect light (just back from a sunny window) | Keep the medium constantly moist, watering every 2-3 days; it likes more water than highland species | Pet-safe |
| Nepenthes rajah | Bright indirect light (just back from a sunny window) | Keep the medium evenly moist at all times, watering every 2-4 days so it never dries out | Pet-safe |
| Nepenthes truncata | Bright indirect light (just back from a sunny window) | Keep the medium evenly moist, watering every 2-4 days so it never fully dries | Pet-safe |
| Nerved Catmint | Direct sun (at least 4-6 hours) | Every 7–10 days in the growing season; much less in winter | Pet-safe |
| Nery's Turk's Cap | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer; reduce to every 4 weeks in winter | Pet-safe |
| Nest Air Plant | Bright indirect light (just back from a sunny window) | Mist or dip 2–3 times per week in summer; once per week in cool winter conditions. | Pet-safe |
| Net-scaled Ceratostylis | Bright indirect light (just back from a sunny window) | When the upper surface of the medium is just drying, roughly every 4-6 days | Pet-safe |
| Network Calathea (Calathea Musaica) | Bright indirect light (just back from a sunny window) | Roughly weekly; keep soil lightly and evenly moist, never soggy or bone-dry | Pet-safe |
| Nevada Bitterroot | Direct sun (at least 4-6 hours) | Moderate in spring; completely dry in summer dormancy | Pet-safe |
| New Dawn Rose | Direct sun (at least 4-6 hours) | Deeply once a week in the growing season; more during establishment or drought | Pet-safe |
| New England Aster | Direct sun (at least 4-6 hours) | Keep soil evenly moist; water weekly, more in heat | Pet-safe |
| New England Aster 'Purple Dome' | Direct sun (at least 4-6 hours) | Keep evenly moist; water deeply during dry spells, about weekly | Pet-safe |
| New Guinea Impatiens | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, often every 1-3 days in warm weather | Pet-safe |
| New Mexico Giant Hyssop | Direct sun (at least 4-6 hours) | Every 7–14 days once established | Pet-safe |
| New York aster | Direct sun (at least 4-6 hours) | Weekly during the growing season; less frequent once established in cool climates | Pet-safe |
| New Zealand Micro Sword | Bright indirect light (just back from a sunny window) | Permanently submerged aquatic plant | Pet-safe |
| New Zealand Tree Fern | Bright indirect light (just back from a sunny window) | Consistently moist — water 2-3 times per week during dry spells in the growing season | Pet-safe |
| New Zealand Tree Fuchsia | Bright indirect light (just back from a sunny window) | Regular — consistent moisture | Pet-safe |
| Nicaraguan Columnea | Bright indirect light (just back from a sunny window) | Every 5–8 days in growing season; every 10–14 days in winter | Pet-safe |
| Nicaraguan Guzmania | Bright indirect light (just back from a sunny window) | Refill cup every 7–10 days; flush monthly | Pet-safe |
| Night Sky Petunia | Direct sun (at least 4-6 hours) | Water when the top 2-3 cm of compost feels dry, typically every 2-4 days in warm weather; containers may need daily watering in midsummer heat | Pet-safe |
| Night-Blooming Cereus | Bright indirect light (just back from a sunny window) | When the top few cm of mix is dry, roughly every 1-2 weeks in growth | Pet-safe |
| Night-Scented Epidendrum | Bright indirect light (just back from a sunny window) | Every 4–5 days in growth; every 7–10 days in cool or dry periods | Pet-safe |
| Night-scented stock | Direct sun (at least 4-6 hours) | Every 7–10 days; allow soil to dry between waterings | Pet-safe |
| Nihoa Palm | Direct sun (at least 4-6 hours) | When the top 5-7 cm of soil is dry, roughly every 10-21 days | Pet-safe |
| Nikko Fir | Direct sun (at least 4-6 hours) | Weekly when establishing; reduced once established | Pet-safe |
| Nile Sage | Bright indirect light (just back from a sunny window) | Moderate; consistent moisture preferred | Pet-safe |
| Nipa Palm | Direct sun (at least 4-6 hours) | Keep constantly moist to wet; does not tolerate drying out | Pet-safe |
| Nobile Dendrobium | Bright indirect light (just back from a sunny window) | Frequently in spring-summer growth, then sharply reduced over the cool winter rest | Pet-safe |
| Noble Cape Primrose | Bright indirect light (just back from a sunny window) | every 5–9 days in active growth, every 14 days in winter | Pet-safe |
| Noble Carrion Flower | Bright indirect light (just back from a sunny window) | Every 14–21 days in the growing season; once monthly or less in winter | Pet-safe |
| Noble Cymbidium | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; every 10–14 days in winter | Pet-safe |
| Noble Cymbidium | Bright indirect light (just back from a sunny window) | Keep lightly and evenly moist, about every 5-7 days, reduced in winter | Pet-safe |
| Noble Dendrobium (miniature form) | Bright indirect light (just back from a sunny window) | Every 5-7 days in summer; every 14-21 days in the winter rest period | Pet-safe |
| Noble Fir | Direct sun (at least 4-6 hours) | Regular watering during establishment; naturally sustained by Pacific Northwest rainfall | Pet-safe |
| Nodding Sage | Direct sun (at least 4-6 hours) | Low to moderate; allow soil to dry between waterings | Pet-safe |
| Nootka Cypress | Direct sun (at least 4-6 hours) | Regularly during establishment; tolerates wet or dry once mature | Pet-safe |
| Nordmann Fir | Direct sun (at least 4-6 hours) | Weekly during establishment; relies on rainfall once established | Pet-safe |
| Norfolk Island pine | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 7-10 days | Pet-safe |
| Norfolk Tree Fern | Bright indirect light (just back from a sunny window) | 2-3 times per week; increase in summer and wind | Pet-safe |
| Northern Blazing Star | Direct sun (at least 4-6 hours) | Every 1-2 weeks once established; more often during establishment | Pet-safe |
| Northern Japanese Hemlock | Bright indirect light (just back from a sunny window) | Weekly during growing season; less in winter | Pet-safe |
| Northern Needleleaf Air Plant | Bright indirect light (just back from a sunny window) | Soak once a week; mist every 2–3 days | Pet-safe |
| Northwind Switchgrass | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks when mature | Pet-safe |
| Novak's Air Plant | Bright indirect light (just back from a sunny window) | Mist thoroughly 2–3 times per week in warm conditions; reduce to once per week in cool, low-humidity winters. | Pet-safe |
| Nude Sheath Bamboo | Direct sun (at least 4-6 hours) | Weekly during the growing season; every 2–3 weeks when dormant | Pet-safe |
| Nummularioides Wax Plant | Bright indirect light (just back from a sunny window) | Every 7-10 days in the growing season; roughly every 2 weeks in winter | Pet-safe |
| Oaxacan Air Plant | Bright indirect light (just back from a sunny window) | Mist 2–3 times per week or soak for 20–30 minutes once per week; reduce in cooler months. | Pet-safe |
| Obscura Wax Plant | Bright indirect light (just back from a sunny window) | Every 10-14 days in growth; every 2-3 weeks in winter | Pet-safe |
| Ochre Coelogyne | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce to once every 2–3 weeks in winter rest | Pet-safe |
| Ocipus Alternanthera | Bright indirect light (just back from a sunny window) | Fully submerged aquatic; maintain in aquarium water continuously | Pet-safe |
| October Daphne | Bright indirect light (just back from a sunny window) | Every 10-14 days in active growth; minimal in winter dormancy | Pet-safe |
| Odontoglossum crispum | Bright indirect light (just back from a sunny window) | Keep evenly moist year-round, watering roughly every 3-5 days so the mix never fully dries | Pet-safe |
| Oersted's Columnea | Bright indirect light (just back from a sunny window) | When the top 50% of the compost volume has dried out | Pet-safe |
| Ohio Goldenrod | Direct sun (at least 4-6 hours) | Moderate to high — keep soil consistently moist | Pet-safe |
| Oklahoma Salmon zinnia | Direct sun (at least 4-6 hours) | Every 3–5 days; adjust for rainfall and temperature | Pet-safe |
| Old Lady Cactus | Direct sun (at least 4-6 hours) | Roughly weekly in spring-summer growth; keep nearly dry in winter | Pet-safe |
| Old Lady Pincushion | Direct sun (at least 4-6 hours) | When the mix is completely dry, roughly every 2-3 weeks in summer; keep nearly dry in winter | Pet-safe |
| Old Lady Pincushion | Direct sun (at least 4-6 hours) | Every 10-14 days in summer; once a month or less in winter | Pet-safe |
| Old Man Cactus | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 2-3 weeks in summer, very little in winter | Pet-safe |
| Old Man Eriosyce | Direct sun (at least 4-6 hours) | When the potting mix has dried out completely, roughly every 14-21 days in the growing season | Pet-safe |
| Old Man Palm | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Old Man Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 6-8 weeks in winter | Pet-safe |
| Old Woman Cactus | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, every 10-14 days in summer | Pet-safe |
| Old World Climbing Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| old-fashioned weigela | Direct sun (at least 4-6 hours) | Weekly during the first growing season; once or twice per month during dry spells when established | Pet-safe |
| Olive Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during active growth (autumn to early spring); none in summer | Pet-safe |
| Olive Living Stones | Direct sun (at least 4-6 hours) | Seasonally — autumn watering only (September–November); completely dry during winter and summer dormancy | Pet-safe |
| Olivia Rose Austin | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week, more in heat | Pet-safe |
| Olympiad Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly during growth | Pet-safe |
| Oncidium ornithorhynchum | Bright indirect light (just back from a sunny window) | Every 4-6 days in growth, as the mix nears dryness | Pet-safe |
| Oncidium sphacelatum | Bright indirect light (just back from a sunny window) | Every 4-7 days in growth, when the mix approaches dryness | Pet-safe |
| Onzuka Bishop's Cap | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in growth; none in winter | Pet-safe |
| Opposite-leaf Cliff Stonecrop | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in spring and summer; very rarely in winter | Pet-safe |
| Optic Living Stones | Direct sun (at least 4-6 hours) | Strictly seasonal: water sparingly during active growth (late summer to spring); completely dry in summer dormancy (June–August) | Pet-safe |
| Optical Plant | Direct sun (at least 4-6 hours) | Seasonally — water only during autumn active growth (September–November); completely dry rest of year | Pet-safe |
| Orange Canistrum | Bright indirect light (just back from a sunny window) | Keep the central tank filled with fresh water; water the root zone when the top 2-3 cm is dry, roughly every 7-10 days | Pet-safe |
| Orange Clock Vine | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 6-8 days in summer | Pet-safe |
| Orange coneflower | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks once established | Pet-safe |
| Orange New Zealand sedge | Bright indirect light (just back from a sunny window) | Regular watering until established; moderate thereafter | Pet-safe |
| Orange Prosthechea | Bright indirect light (just back from a sunny window) | When the top layer of the mix is dry, roughly every 6-9 days; reduce slightly in winter | Pet-safe |
| orange sinningia | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth; stop completely during winter dormancy | Pet-safe |
| Orange Snow Ball Cactus | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 7-10 days in spring and summer; every 4-6 weeks in autumn; none or barely any in winter | Pet-safe |
| Orange Stonecrop | Direct sun (at least 4-6 hours) | Every 10-14 days when establishing; virtually rain-fed once mature | Pet-safe |
| Orange Woolly Sage | Bright indirect light (just back from a sunny window) | Weekly in the growing season; reduce to monthly in winter | Pet-safe |
| Orange-Flowered Matucana | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days in summer | Pet-safe |
| Orchid | Bright indirect light (just back from a sunny window) | Once a week — soak the medium thoroughly, then drain | Pet-safe |
| Orchid Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Orcutt's Liveforever | Direct sun (at least 4-6 hours) | Every 1–2 weeks in autumn through spring (growing season); withhold almost entirely in summer | Pet-safe |
| Ord River Sundew | Bright indirect light (just back from a sunny window) | Standing tray method (growing season); minimal watering (rest period) | Pet-safe |
| Oregon Stonecrop | Bright indirect light (just back from a sunny window) | Every 10-14 days in active growth; monthly or less in winter | Pet-safe |
| Oreocereus trollii | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 10-14 days in active growth; none in winter | Pet-safe |
| oriental fountain grass | Direct sun (at least 4-6 hours) | Every 10–14 days once established; more frequent during establishment | Pet-safe |
| Oriental Hornbeam | Direct sun (at least 4-6 hours) | Low once established; water during first 2 seasons only | Pet-safe |
| orientandina goldfish plant | Bright indirect light (just back from a sunny window) | Allow the top 2–3 cm of the growing medium to dry before watering; roughly every 7–10 days in active growth. | Pet-safe |
| Orpen's Aloinopsis | Bright indirect light (just back from a sunny window) | Every 10–14 days in autumn–spring; minimal in summer | Pet-safe |
| Orpen's Aloinopsis | Direct sun (at least 4-6 hours) | Every 2–3 weeks during autumn through early spring; once a month or not at all through summer | Pet-safe |
| Orssich's Holiday Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in the growing season; reduce to every 2-3 weeks during the autumn rest | Pet-safe |
| Orthophytum saxicola | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Ospina's Vriesea | Bright indirect light (just back from a sunny window) | Keep cup filled; flush weekly; medium every 2 weeks | Pet-safe |
| Osteospermum 'Akila Daisy White' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, about every 4-7 days | Pet-safe |
| Osteospermum 'Sunny Serena White' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Osteospermum 'Voltage Yellow' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Outstretched Maxillaria | Bright indirect light (just back from a sunny window) | Water when the top 1-2 cm of medium is dry, approximately every 3-5 days | Pet-safe |
| Overdam Feather Reed Grass | Bright indirect light (just back from a sunny window) | Weekly during establishment; every 2 weeks once established | Pet-safe |
| Overdam Variegated Feather Reed Grass | Direct sun (at least 4-6 hours) | When the top few centimetres of soil dry, about weekly; tolerates occasionally damp soil | Pet-safe |
| Owl Eye Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, approximately every 10-14 days in summer; once every 5-8 weeks in winter | Pet-safe |
| Owl Eyes Cactus | Direct sun (at least 4-6 hours) | When the soil is bone dry, roughly every 2-3 weeks in spring and summer; nearly dry in winter | Pet-safe |
| Ox Tongue | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in summer, monthly or less in winter | Pet-safe |
| Pachyphytum bracteosum | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 10-14 days in growth, sparingly in winter | Pet-safe |
| Pachyphytum compactum | Direct sun (at least 4-6 hours) | When soil is bone dry, about every 2 weeks in growth and rarely in winter | Pet-safe |
| Pachyphytum glutinicaule | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in summer, very sparingly in winter | Pet-safe |
| Pachyphytum hookeri | Direct sun (at least 4-6 hours) | When soil is fully dry, about every 10-14 days in active growth, minimal in winter | Pet-safe |
| Pachyphytum werdermannii | Direct sun (at least 4-6 hours) | When soil is bone dry, roughly every 2 weeks in growth, rarely in winter | Pet-safe |
| Pachyveria 'Clavifolia' | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 10-14 days in growth, sparingly in winter | Pet-safe |
| Pachyveria 'Exotica' | Direct sun (at least 4-6 hours) | When soil is fully dry, about every 10-14 days in growth, minimal in winter | Pet-safe |
| Pachyveria 'Powder Puff' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in summer | Pet-safe |
| Pachyveria 'Powder Puff' | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 10-14 days in growth, sparingly in winter | Pet-safe |
| Pacific Dogwood | Bright indirect light (just back from a sunny window) | Regular deep watering, especially in summer; do not let the root zone dry out | Pet-safe |
| Pacific Fan Palm | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Pacific Silver Fir | Bright indirect light (just back from a sunny window) | Regularly during establishment; relies on natural rainfall when mature | Pet-safe |
| Padang Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in growth; every 3–4 weeks in winter | Pet-safe |
| Painted Brake Fern | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil starts to dry, roughly every 5-7 days; keep evenly moist | Pet-safe |
| Painted Columnea | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce to every 10–14 days in winter | Pet-safe |
| Painted Echeveria | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| Pale Coryphantha | Direct sun (at least 4-6 hours) | When the soil is fully dry, every 10-14 days in summer; every 4-6 weeks or less in winter | Pet-safe |
| Pale Pitcher Plant | Direct sun (at least 4-6 hours) | Keep soil permanently wet; refill the standing tray as it dries | Pet-safe |
| Pale Purple Coneflower | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry; weekly while establishing, then rarely | Pet-safe |
| Pale Silver Skin Plant | Direct sun (at least 4-6 hours) | Every 2–4 weeks in late summer through autumn (active growth into flowering); water sparingly in spring; completely withheld mid-summer | Pet-safe |
| Pale Vygie | Direct sun (at least 4-6 hours) | Every 3–4 weeks established; more frequent in first season | Pet-safe |
| Pale-Leaved Sunflower | Direct sun (at least 4-6 hours) | Weekly until established, then every 1-2 weeks | Pet-safe |
| Pampas Grass | Direct sun (at least 4-6 hours) | Weekly while establishing; thereafter only in prolonged drought | Pet-safe |
| Panama Queen | Bright indirect light (just back from a sunny window) | Every 5–7 days during the growing season; reduce in winter | Pet-safe |
| Panicle Fuchsia | Bright indirect light (just back from a sunny window) | Regular — keep just moist | Pet-safe |
| Pansy | Direct sun (at least 4-6 hours) | Twice-weekly watering | Pet-safe |
| Pansy Orchid | Bright indirect light (just back from a sunny window) | Every 3-5 days; up to 2-3 times weekly in warm, dry spells | Pet-safe |
| Paper Birch | Direct sun (at least 4-6 hours) | Weekly in the first 3 years; every 10–14 days once established, more in summer heat | Pet-safe |
| Paper Spine Cactus | Direct sun (at least 4-6 hours) | When fully dry, about every 2-3 weeks in summer and roughly monthly or less in winter | Pet-safe |
| Paradox Sundew | Bright indirect light (just back from a sunny window) | Wet tray (growing season); nearly dry (dry season / dormancy) | Pet-safe |
| Parallel Peperomia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Parallel-Stripe Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Parkinson's Epidendrum | Bright indirect light (just back from a sunny window) | Every 3–5 days in active growth; reduced in winter | Pet-safe |
| Parodia microsperma | Bright indirect light (just back from a sunny window) | Soak-and-dry, roughly every 7-10 days in summer; keep dry in winter | Pet-safe |
| Parrot Feather Bromeliad | Bright indirect light (just back from a sunny window) | Keep cup filled; medium watering every 2 weeks | Pet-safe |
| Parrot Pitcher Plant | Direct sun (at least 4-6 hours) | Keep permanently wet, standing in 1-3 cm of water (tray method); it tolerates brief flooding well | Pet-safe |
| Pat Austin Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season, increasing in hot, dry spells | Pet-safe |
| Path Rush | Direct sun (at least 4-6 hours) | Minimal supplemental watering needed once established; tolerates periodic flooding and dry spells | Pet-safe |
| Paul's Himalayan Musk Rose | Direct sun (at least 4-6 hours) | Deep soak weekly through the first two growing seasons; established plants rarely need watering | Pet-safe |
| Paz's Wax Plant | Bright indirect light (just back from a sunny window) | Every 7-14 days in active growth; every 14-21 days in winter | Pet-safe |
| Peace Rose | Direct sun (at least 4-6 hours) | Deeply 1-2 times per week, more in heat | Pet-safe |
| Peanut Cactus | Direct sun (at least 4-6 hours) | Every 1-3 weeks in spring/summer; roughly monthly or less in winter | Pet-safe |
| Pearl Haworthia | Bright indirect light (just back from a sunny window) | When soil is fully dry, about every 10-14 days in summer, minimal in winter | Pet-safe |
| Pearl Plant | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in summer | Pet-safe |
| Peculiar Cheiridopsis | Direct sun (at least 4-6 hours) | Every 2–3 weeks in autumn–spring; none in summer | Pet-safe |
| Pedalai | Direct sun (at least 4-6 hours) | Water 3–4 times per week for young trees; established trees in ground need weekly deep irrigation supplemented by natural rainfall. | Pet-safe |
| Pelotazo Mallow | Direct sun (at least 4-6 hours) | Every 10–21 days in summer; monthly or less in winter | Pet-safe |
| Pemba Palm | Bright indirect light (just back from a sunny window) | Every 4–6 days in warm months; reduce to every 10–14 days in cooler periods | Pet-safe |
| Pencil Cactus Rhipsalis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Penelope Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly through the growing season, more in heat | Pet-safe |
| Penisetum massaicum Red Bunny Tails | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, about weekly; more often in pots and heat | Pet-safe |
| Penther's Cape Primrose | Bright indirect light (just back from a sunny window) | every 7–10 days during active growth, every 14–21 days in winter | Pet-safe |
| Peperomia 'Hope' | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, typically every 7-12 days | Pet-safe |
| Peperomia 'Napoli Nights' | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia 'Napoli Nights' (dark form) | Bright indirect light (just back from a sunny window) | When top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia 'Peppermill' | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia 'Pixie Lime' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia 'Quito' | Bright indirect light (just back from a sunny window) | When top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia 'Rana Verde' | Bright indirect light (just back from a sunny window) | When top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia 'Schumi Red' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia 'Watermelon' (Ginny hybrid) | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia albovittata | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia albovittata 'Minima' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia albovittata 'Rana Verde' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, about every 7-12 days | Pet-safe |
| Peperomia angulata | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia argyreia 'Soccer Ball' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia arifolia | Bright indirect light (just back from a sunny window) | When the top 3 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia asperula | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days | Pet-safe |
| Peperomia axillaris | Bright indirect light (just back from a sunny window) | When the soil is almost fully dry, roughly every 12-16 days | Pet-safe |
| Peperomia blanda | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia caperata 'Burgundy' | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia caperata 'Luna Red' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia caperata 'Red Ripple' | Bright indirect light (just back from a sunny window) | When top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia caperata 'Suzanne' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia caperata 'Teresa' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia clusiifolia | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia columella | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-21 days in growth | Pet-safe |
| Peperomia crassifolia | Bright indirect light (just back from a sunny window) | When top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia deppeana | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia dolabriformis | Bright indirect light (just back from a sunny window) | When soil is fully dry, roughly every 14-21 days | Pet-safe |
| Peperomia ecklonii | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia elongata | Bright indirect light (just back from a sunny window) | When top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia emarginella | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is just drying, about every 5-9 days | Pet-safe |
| Peperomia floribunda | Bright indirect light (just back from a sunny window) | When top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia fraseri | Bright indirect light (just back from a sunny window) | When the top third of the soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia Frost | Bright indirect light (just back from a sunny window) | When the top 1-2 in (2.5-5 cm) of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia Ginny | Bright indirect light (just back from a sunny window) | Every 1-2 weeks | Pet-safe |
| Peperomia glabella | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia glabella 'Variegata' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia graveolens 'Ruby Glow' | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-18 days | Pet-safe |
| Peperomia hoffmannii | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia Hope | Bright indirect light (just back from a sunny window) | Every 1-2 weeks | Pet-safe |
| Peperomia incana | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 12-18 days | Pet-safe |
| Peperomia maculosa | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 9-12 days | Pet-safe |
| Peperomia magnoliifolia | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia magnoliifolia 'Variegata' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 8-13 days | Pet-safe |
| Peperomia marmorata | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia nitida | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia nitida 'Variegata' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia nivalis | Bright indirect light (just back from a sunny window) | When the soil is dry, roughly every 7-14 days in growth | Pet-safe |
| Peperomia obtusifolia 'Golden Gate' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, about every 7-14 days | Pet-safe |
| Peperomia obtusifolia 'Lemon Lime' | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia obtusifolia 'Marble' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia obtusifolia 'Variegata' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia orba | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, about every 7-12 days | Pet-safe |
| Peperomia Pepperspot | Bright indirect light (just back from a sunny window) | When the top half of the pot is dry, roughly every 7-12 days | Pet-safe |
| Peperomia perciliata | Bright indirect light (just back from a sunny window) | When the soil surface is dry, roughly every 7-10 days | Pet-safe |
| Peperomia pereskiifolia | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia pseudovariegata | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia Rosso | Bright indirect light (just back from a sunny window) | When the soil is 50-75% dry, roughly every 10-14 days | Pet-safe |
| Peperomia rotundifolia 'Trailing Jade' | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia rubella 'Zippy' | Bright indirect light (just back from a sunny window) | When the top 2-4 cm of soil is dry, roughly every 6-10 days | Pet-safe |
| Peperomia scandens | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia serpens | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia tetragona | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia tetraphylla | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia trifolia | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia trinervula | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Peperomia urocarpa | Bright indirect light (just back from a sunny window) | When the top third to half of the soil is dry, roughly every 7-12 days | Pet-safe |
| Peperomia velutina | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 9-12 days | Pet-safe |
| Peperomia verticillata | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Peperomia viridispica | Bright indirect light (just back from a sunny window) | When top 2-3 cm of soil is dry, roughly every 7-12 days | Pet-safe |
| Pepperwort | Bright indirect light (just back from a sunny window) | Fully submerged or rooted in very shallow water; do not allow the substrate to dry out | Pet-safe |
| Percival's Cattleya | Bright indirect light (just back from a sunny window) | Every 7-10 days in active growth; reduce to every 14-21 days after pseudobulbs mature in autumn | Pet-safe |
| Perennial Candytuft | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks once established | Pet-safe |
| Perez de la Rosa's Mammillaria | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 6 weeks in winter | Pet-safe |
| Perez's Sea Lavender | Direct sun (at least 4-6 hours) | Every 2–3 weeks when established; less in winter | Pet-safe |
| Perplexing Crown Cactus | Direct sun (at least 4-6 hours) | Every 10-14 days in the growing season; nearly dry from October to February | Pet-safe |
| Perplexing Rebutia | Direct sun (at least 4-6 hours) | Every 10–14 days in spring/summer; every 3–4 weeks in autumn; once monthly or none in winter | Pet-safe |
| Persian Carpet zinnia | Direct sun (at least 4-6 hours) | Every 5–7 days; highly drought tolerant once established | Pet-safe |
| Persian Catmint | Direct sun (at least 4-6 hours) | Every 7–14 days; less in cooler seasons | Pet-safe |
| Persian Violet | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is just dry, roughly every 3-5 days | Pet-safe |
| Peruvian Apple Cactus | Direct sun (at least 4-6 hours) | Every 2-3 weeks in spring/summer; roughly monthly or less in winter | Pet-safe |
| Peruvian Canna | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water every 4-6 days in summer | Pet-safe |
| Peruvian Old Man Cactus | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 14-21 days in summer and once every 4-6 weeks in winter | Pet-safe |
| Peruvian Oroya | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, every 10-14 days in summer | Pet-safe |
| Peruvian zinnia | Direct sun (at least 4-6 hours) | Once or twice weekly; allow the top 3 cm of soil to dry between waterings | Pet-safe |
| Petiole Sundew | Bright indirect light (just back from a sunny window) | Wet tray (October–March in Australia / spring–autumn in cultivation); reduced watering (cooler months) | Pet-safe |
| Petunia | Direct sun (at least 4-6 hours) | Even moisture — every 1-2 days for hanging baskets in heat | Pet-safe |
| Petunia 'Supertunia Royal Velvet' | Direct sun (at least 4-6 hours) | When the top 2-3cm of soil is dry, frequently daily for containers in summer | Pet-safe |
| Petunia 'Supertunia Vista Bubblegum' | Direct sun (at least 4-6 hours) | When the top 2-3cm of soil is dry, often daily for containers in summer heat | Pet-safe |
| Petunia 'Tidal Wave Silver' | Direct sun (at least 4-6 hours) | When the top 2-3cm of soil is dry; containers may need daily watering in summer | Pet-safe |
| Petunia 'Wave Purple' | Direct sun (at least 4-6 hours) | When the top 2-3cm of soil is dry, often daily in summer for baskets and containers | Pet-safe |
| Petunia axillaris | Direct sun (at least 4-6 hours) | When the top 2-3cm of soil is dry; avoid both drought and waterlogging | Pet-safe |
| Peyote-Like Turbinicarpus | Bright indirect light (just back from a sunny window) | When the soil is completely dry, roughly every 14-21 days in summer and once a month or less in winter | Pet-safe |
| Pflanz's Chin Cactus | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring/summer; every 3–4 weeks in autumn; almost none in winter | Pet-safe |
| Phalaenopsis 'Brother Girl' | Bright indirect light (just back from a sunny window) | When the bark medium is nearly dry, typically every 7-10 days | Pet-safe |
| Phalaenopsis 'Brother Sara Gold' | Bright indirect light (just back from a sunny window) | When the bark is nearly dry, typically every 7-10 days | Pet-safe |
| Phalaenopsis 'Liodoro' | Bright indirect light (just back from a sunny window) | About every 7-10 days, when the bark begins to dry and roots silver over | Pet-safe |
| Phalaenopsis 'Sogo Yukidian' | Bright indirect light (just back from a sunny window) | When the bark mix is nearly dry, usually every 7-10 days | Pet-safe |
| Phalaenopsis violacea | Bright indirect light (just back from a sunny window) | When the bark mix is nearly dry, roughly every 5-7 days | Pet-safe |
| Phalaenopsis-type Dendrobium | Bright indirect light (just back from a sunny window) | Regularly through warm active growth; reduced over a short, cooler, drier winter | Pet-safe |
| Pheasant's Tail Grass | Bright indirect light (just back from a sunny window) | Every 7–14 days in the growing season; minimal in winter | Pet-safe |
| Philippine Ceratostylis | Bright indirect light (just back from a sunny window) | When the top of the medium begins to feel barely dry, roughly every 5-7 days | Pet-safe |
| Phlomis-Like Sage | Direct sun (at least 4-6 hours) | Every 2-3 weeks once established | Pet-safe |
| Phlox drummondii 'Intensia Cabernet' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Phlox maculata 'Alpha' | Direct sun (at least 4-6 hours) | Keep evenly moist; water deeply 1-2 times weekly in dry spells, more in heat | Pet-safe |
| Phlox paniculata 'Starfire' | Direct sun (at least 4-6 hours) | Keep soil evenly moist; water deeply about weekly, more in heat and drought | Pet-safe |
| Phlox subulata 'Emerald Blue' | Direct sun (at least 4-6 hours) | Water when soil is dry; drought-tolerant once established | Pet-safe |
| Phragmipedium 'Living Fire' | Bright indirect light (just back from a sunny window) | Keep constantly moist to wet; water every 1-3 days, often standing the pot in a shallow tray of clean water | Pet-safe |
| Phragmipedium besseae | Bright indirect light (just back from a sunny window) | Keep constantly moist to wet; water every 1-3 days and many growers stand the pot in 1-2 cm of clean water | Pet-safe |
| Phragmipedium Eric Young | Bright indirect light (just back from a sunny window) | Keep evenly moist at all times; water every 2-4 days or stand the pot in 1-2 cm of water | Pet-safe |
| Phragmipedium longifolium | Bright indirect light (just back from a sunny window) | Keep constantly moist; water every 1-3 days, often with the pot standing in a shallow tray of clean water | Pet-safe |
| Piccolo Banda Peperomia | Bright indirect light (just back from a sunny window) | Every 7-10 days; let the top 2-3cm (1 inch) dry out first | Pet-safe |
| Pickle Plant | Bright indirect light (just back from a sunny window) | Every 2–4 weeks; reduce to monthly or less in winter | Pet-safe |
| Pigeon Orchid | Bright indirect light (just back from a sunny window) | Frequently in warm growth, allowing brief drying between waterings | Pet-safe |
| Pilalo Fuchsia | Bright indirect light (just back from a sunny window) | Freely in growth; reduce in winter | Pet-safe |
| Pilea 'Dark Mystery' | Bright indirect light (just back from a sunny window) | When the top inch of soil is dry, often 1-2 times per week | Pet-safe |
| Pilea 'Friendship' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 4-8 days | Pet-safe |
| Pilea 'Moon Valley' (Friendship Plant) | Bright indirect light (just back from a sunny window) | Roughly once or twice a week; let the top of the soil just begin to dry between waterings | Pet-safe |
| Pilea 'Silver Tree' (Pilea spruceana 'Silver Tree') | Bright indirect light (just back from a sunny window) | When the top 1 inch (2.5-3 cm) of soil is dry (roughly weekly in growth) | Pet-safe |
| Pilea cadierei 'Minima' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pilea cadierei 'Silver Tree' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-9 days | Pet-safe |
| Pilea glauca 'Aquamarine' (Grey Baby Tears) | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil feels dry (roughly weekly in growth) | Pet-safe |
| Pilea grandifolia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Pilea involucrata | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pilea involucrata 'Norfolk' | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pilea libanensis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Pilea microphylla 'Variegata' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pilea mollis | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pilea nummuarlifolia 'Bunny Ears' | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pilea nummulariifolia | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Pilea peperomioides 'Minima' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Pilea peperomioides 'Mojito' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Pilea peperomioides 'Sugar' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Pilea pubescens | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pilea pubescens 'Silver Cloud' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pilea serpyllacea | Bright indirect light (just back from a sunny window) | When the surface just begins to dry, roughly every 4-7 days | Pet-safe |
| Pillans' Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks during late summer through early spring; fully dry in June–August | Pet-safe |
| Pima Pineapple Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer and once every 4-6 weeks in winter | Pet-safe |
| Pincushion Cactus | Direct sun (at least 4-6 hours) | Every 10–14 days in spring/summer; monthly or less in autumn; none in winter | Pet-safe |
| Pincushion flower | Direct sun (at least 4-6 hours) | Once or twice weekly | Pet-safe |
| Pine-scented Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Pineapple Bromeliad | Bright indirect light (just back from a sunny window) | every 7–10 days in summer, every 14–21 days in winter | Pet-safe |
| Pinecone Cactus | Direct sun (at least 4-6 hours) | When the mix is bone dry, roughly every 14-21 days in the growing season; once a month or less from October to February | Pet-safe |
| Pinel's Aechmea | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (soil); replenish central cup every 2–4 weeks | Pet-safe |
| Pinel's Aechmea | Bright indirect light (just back from a sunny window) | Refill the central cup every 5-7 days; water the medium when the top 2-3 cm is dry, roughly every 10-14 days | Pet-safe |
| Pineleaf Penstemon | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; rarely in winter | Pet-safe |
| Pinemat manzanita | Direct sun (at least 4-6 hours) | Low to moderate; allow soil to dry between waterings once established | Pet-safe |
| Ping Pong Purple globe amaranth | Direct sun (at least 4-6 hours) | Every 5–7 days; allow soil surface to dry slightly | Pet-safe |
| Pink Cascade Tamarisk | Direct sun (at least 4-6 hours) | Low to moderate; drought-tolerant once established | Pet-safe |
| Pink Coreopsis | Direct sun (at least 4-6 hours) | Moderate to high; keep soil evenly moist | Pet-safe |
| Pink Deutzia | Direct sun (at least 4-6 hours) | Every 7-10 days during dry periods; drought-tolerant once established | Pet-safe |
| Pink Fingers Orchid | Bright indirect light (just back from a sunny window) | Sparingly during active growth (autumn to spring); cease almost entirely during summer dormancy | Pet-safe |
| Pink Flowering Dogwood | Bright indirect light (just back from a sunny window) | Weekly deep watering; increase in summer heat | Pet-safe |
| Pink Knock Out Rose | Direct sun (at least 4-6 hours) | About 2.5 cm of water weekly, deep soak | Pet-safe |
| Pink Moth Orchid | Bright indirect light (just back from a sunny window) | When the bark approaches dryness, typically every 7-10 days | Pet-safe |
| Pink Muhly Grass | Direct sun (at least 4-6 hours) | Every 10-14 days during the first growing season; minimal supplemental irrigation once established | Pet-safe |
| Pink Nerve Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days; keep soil evenly moist | Pet-safe |
| Pink Pampas Grass | Direct sun (at least 4-6 hours) | Weekly while establishing; afterwards only in prolonged drought | Pet-safe |
| Pink Panther episcia | Bright indirect light (just back from a sunny window) | Allow the top centimetre of soil to dry before watering — approximately every 5–7 days in the growing season. | Pet-safe |
| Pink Penny Cranesbill | Bright indirect light (just back from a sunny window) | Water once or twice a week during dry periods; reduce in winter | Pet-safe |
| Pink Pussytoes | Direct sun (at least 4-6 hours) | Low; water only when soil is completely dry | Pet-safe |
| Pink Quill Bromeliad | Bright indirect light (just back from a sunny window) | Mist thoroughly 2–3 times per week; soak in room-temperature water for 20–30 minutes once a week during active growth. | Pet-safe |
| Pink Rock Jasmine | Direct sun (at least 4-6 hours) | Very sparingly; driest in winter | Pet-safe |
| Pink Rock Orchid | Bright indirect light (just back from a sunny window) | When the potting medium is nearly dry, roughly every 5-7 days in summer; reduce to every 14-21 days in winter to trigger blooming | Pet-safe |
| Pink Sundew | Bright indirect light (just back from a sunny window) | Tray method, continuously wet | Pet-safe |
| Pink Surprise calendula | Direct sun (at least 4-6 hours) | Every 5–7 days; reduce in cool, wet periods | Pet-safe |
| Pink Velvet Banana | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pink Vygie | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is fully dry, roughly every 7-14 days in spring-summer; very sparingly in winter (once monthly or less) | Pet-safe |
| Pinstripe Calathea | Bright indirect light (just back from a sunny window) | Roughly weekly; keep soil lightly, evenly moist | Pet-safe |
| Pinstripe Calathea | Bright indirect light (just back from a sunny window) | Roughly weekly; when the top 2-3 cm of soil just begins to dry | Pet-safe |
| Piper's Bellflower | Direct sun (at least 4-6 hours) | Sparingly; allow near-drying between waterings | Pet-safe |
| Pirri-Pirri Bur | Direct sun (at least 4-6 hours) | Fortnightly once established; drought-tolerant | Pet-safe |
| Pitcairnia flammea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Pitton's Houseleek | Direct sun (at least 4-6 hours) | Every 2–3 weeks in summer; monthly or less in winter | Pet-safe |
| Pixie Lime Peperomia | Bright indirect light (just back from a sunny window) | When the top 2.5-4 cm (1-1.5 in) of mix is dry, often every 7-12 days | Pet-safe |
| Plaid Cactus | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in growth; minimal in winter | Pet-safe |
| Plains Coreopsis | Direct sun (at least 4-6 hours) | Low; once established, water only during prolonged drought | Pet-safe |
| Plantain-leaved Pussytoes | Bright indirect light (just back from a sunny window) | Low; drought-tolerant once established | Pet-safe |
| Plastic Plant Orchid | Bright indirect light (just back from a sunny window) | Every 4–7 days in growth; every 10–14 days in winter | Pet-safe |
| Playboy Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly | Pet-safe |
| Pleasant Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks during autumn growth; none in summer | Pet-safe |
| Plectranthus Oertendahlii | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Pleione bulbocodioides | Bright indirect light (just back from a sunny window) | Regularly during active leaf growth; reduce sharply to nearly dry through winter dormancy | Pet-safe |
| Pleione formosana | Bright indirect light (just back from a sunny window) | Regularly when in leaf and growth; reduce to occasional misting and near-dry during winter dormancy | Pet-safe |
| Pleione speciosa | Bright indirect light (just back from a sunny window) | Regularly while in leaf and growth; cut back to nearly dry during winter dormancy | Pet-safe |
| Pleiospilos bolusii | Direct sun (at least 4-6 hours) | Sparingly and seasonally: water in spring and autumn when soil is dry; keep nearly dry in mid-summer and winter | Pet-safe |
| Pleiospilos compactus | Direct sun (at least 4-6 hours) | Seasonally: water in spring and autumn when soil is dry; keep nearly dry in mid-summer and winter | Pet-safe |
| Pleiospilos simulans | Direct sun (at least 4-6 hours) | Seasonally: water in spring and autumn when soil is dry; keep nearly dry in mid-summer and winter | Pet-safe |
| Plover Eggs | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in the growing season (spring–autumn); once a month or less in winter | Pet-safe |
| Plumed cockscomb | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Plumed Palm | Bright indirect light (just back from a sunny window) | Every 5–7 days in the growing season; every 10–14 days in cooler months | Pet-safe |
| Pohl's Air Plant | Bright indirect light (just back from a sunny window) | Soak for 20–30 minutes once per week, or mist thoroughly 2–3 times per week; reduce frequency in cool winter months. | Pet-safe |
| Point Reyes bearberry | Direct sun (at least 4-6 hours) | Low once established; water weekly for the first 1–2 seasons | Pet-safe |
| Pointed-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Pointed-Leaf Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer; every 3–4 weeks in winter | Pet-safe |
| Poker alumroot | Bright indirect light (just back from a sunny window) | Every 7–14 days once established; more frequent when young | Pet-safe |
| Polished Air Plant | Bright indirect light (just back from a sunny window) | Mist thoroughly 2–3 times per week, or soak briefly once per week in warm conditions; reduce in winter. | Pet-safe |
| Polka dot plant | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, every 4-7 days | Pet-safe |
| Polka Dot Plant | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil feels dry, roughly every 5-7 days in the growing season | Pet-safe |
| Polka Dot Plant 'Splash Select Red' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is just drying, often every 3-5 days | Pet-safe |
| Polynesian Davallia | Bright indirect light (just back from a sunny window) | Every 5–7 days in summer, every 10–14 days in winter | Pet-safe |
| Pompona Vanilla | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of the growing medium feels dry, roughly every 7-10 days in summer | Pet-safe |
| Ponytail palm | Direct sun (at least 4-6 hours) | When the soil is bone dry, every 2-3 weeks | Pet-safe |
| Portea petropolitana | Bright indirect light (just back from a sunny window) | Keep a little water in the central cup; flush and refill every 1-2 weeks | Pet-safe |
| Portuguese heath | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2 weeks in the first summer; drought-tolerant once established | Pet-safe |
| Potbelly Air Plant | Bright indirect light (just back from a sunny window) | Mist 2–3 times per week; the bulbous base dries faster than larger species so check moisture more frequently in hot, dry weather. | Pet-safe |
| Potts Wax Plant | Bright indirect light (just back from a sunny window) | Every 7-10 days in summer; every 14-21 days in winter | Pet-safe |
| Pouch-Flowered Pearcea | Bright indirect light (just back from a sunny window) | Every 6–8 days during active growth; reduce in winter dormancy | Pet-safe |
| Pouched Catasetum | Direct sun (at least 4-6 hours) | Daily during active growth; stop completely during dormancy | Pet-safe |
| Powder Puff Cactus | Direct sun (at least 4-6 hours) | When the soil is bone dry, roughly every 2-3 weeks in spring and summer; little to none in winter | Pet-safe |
| Powder Puff Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in spring and summer; once every 4-6 weeks in winter | Pet-safe |
| Powdery Echeveria | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 12-16 days; it is unusually drought-tolerant | Pet-safe |
| Powdery Strap Airplant | Bright indirect light (just back from a sunny window) | Keep 1-2 cm of water in the central cup at all times; refresh weekly | Pet-safe |
| PowWow Wild Berry coneflower | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2 weeks once established in dry spells | Pet-safe |
| Prairie Azure Sage | Direct sun (at least 4-6 hours) | Fortnightly once established | Pet-safe |
| Prairie Blazing Star | Direct sun (at least 4-6 hours) | Moderate; weekly during establishment; drought-tolerant once established | Pet-safe |
| Prairie Coreopsis | Direct sun (at least 4-6 hours) | Low; drought-tolerant once established | Pet-safe |
| Prairie Dock | Direct sun (at least 4-6 hours) | Every 2-4 weeks once established | Pet-safe |
| Prairie Gentian | Direct sun (at least 4-6 hours) | Low — drought tolerant once established | Pet-safe |
| Prairie Goldenrod | Direct sun (at least 4-6 hours) | Low — water only to establish; drought-tolerant once rooted | Pet-safe |
| Prairie Heart-Leaved Aster | Direct sun (at least 4-6 hours) | Low to moderate — drought tolerant | Pet-safe |
| Prairie June Grass | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; withhold water during summer dormancy | Pet-safe |
| Prairie Penstemon | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; weekly during establishment | Pet-safe |
| Prairie Sky Switchgrass | Direct sun (at least 4-6 hours) | Weekly during first season; every 2–3 weeks once established | Pet-safe |
| Prairie Violet | Bright indirect light (just back from a sunny window) | Fortnightly or less once established; drought-tolerant | Pet-safe |
| Preston Palm | Bright indirect light (just back from a sunny window) | Every 4–7 days; containers may need more frequent checking in summer heat | Pet-safe |
| Preston's Palm | Bright indirect light (just back from a sunny window) | Every 4–7 days; containers may need checking more frequently in summer heat | Pet-safe |
| Pretty Face | Direct sun (at least 4-6 hours) | Sparingly; allow soil to dry completely between waterings, roughly every 14-21 days during active growth | Pet-safe |
| Pretty Living Stone | Direct sun (at least 4-6 hours) | Only when the old leaf pair is fully shrivelled (during active growth, roughly every 2-3 weeks); no water during leaf renewal | Pet-safe |
| Pretty Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14 days in summer and once every 6-8 weeks in winter | Pet-safe |
| Pretty Trichocentrum | Bright indirect light (just back from a sunny window) | When the top of the bark is dry, roughly every 7-9 days; slightly drier in winter | Pet-safe |
| Prickly Crossandra | Bright indirect light (just back from a sunny window) | Every 5–7 days in growing season; reduce to every 10–14 days in winter | Pet-safe |
| Prickly Ice Plant | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 10-14 days in spring and summer; once monthly or less in winter | Pet-safe |
| Pride of Brazil Orchid | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth (spring–summer); every 14–21 days during the winter rest | Pet-safe |
| Pride of Rochester Deutzia | Direct sun (at least 4-6 hours) | Every 7-10 days during dry spells; drought-tolerant once established | Pet-safe |
| Prima Donna Magic Flower | Bright indirect light (just back from a sunny window) | Every 3–5 days during active growth; withhold entirely during dormancy | Pet-safe |
| Princess Alexandra of Kent Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in growth; more in heat or containers | Pet-safe |
| Prism-fruit Prosthechea | Bright indirect light (just back from a sunny window) | When the top of the bark dries, roughly every 7-10 days in growth; every 10-14 days in winter | Pet-safe |
| Profusion orange zinnia | Direct sun (at least 4-6 hours) | Every 5–7 days once established; more frequently in pots or extreme heat | Pet-safe |
| Profusion White Zinnia | Direct sun (at least 4-6 hours) | When the top 3–5 cm of soil is dry, roughly every 5–7 days in summer | Pet-safe |
| Prosperity Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the growing season, more in heat | Pet-safe |
| Prostrate Speedwell | Direct sun (at least 4-6 hours) | Every 10–14 days; drought-tolerant once established | Pet-safe |
| Protruding Air Plant | Bright indirect light (just back from a sunny window) | 2–3 times per week misting, or a 20-minute soak once a week | Pet-safe |
| Puebla Air Plant | Bright indirect light (just back from a sunny window) | Soak 20–30 minutes once a week; mist 2–3 times weekly in dry conditions | Pet-safe |
| Puerto Rican Columnea | Bright indirect light (just back from a sunny window) | Water thoroughly, then allow the top 2–3 cm to dry before re-watering; roughly every 7 days in summer | Pet-safe |
| Puerto Rican Guzmania | Bright indirect light (just back from a sunny window) | Refresh cup weekly; mist in dry weather | Pet-safe |
| Pumila Dwarf Pampas Grass | Direct sun (at least 4-6 hours) | Weekly during establishment; afterwards only in drought | Pet-safe |
| Pumila Norway Spruce | Direct sun (at least 4-6 hours) | Every 7-10 days while establishing; deep soak when the top 5 cm of soil dries | Pet-safe |
| Punting-Pole Bamboo | Direct sun (at least 4-6 hours) | Once or twice per week during growing season; less frequent in winter | Pet-safe |
| Purity cosmos | Direct sun (at least 4-6 hours) | Every 5–7 days; highly drought tolerant once established | Pet-safe |
| Purple Air Plant | Bright indirect light (just back from a sunny window) | Soak 20–30 minutes once a week; mist sparingly 1–2 times weekly | Pet-safe |
| Purple Bacopa | Bright indirect light (just back from a sunny window) | Fully submerged aquatic plant; maintain in aquarium water continuously | Pet-safe |
| Purple Bladderwort | Bright indirect light (just back from a sunny window) | Fully aquatic — kept submerged or floating in distilled, rainwater, or very low-mineral water at all times | Pet-safe |
| Purple Cliff Brake Fern | Bright indirect light (just back from a sunny window) | When the soil is nearly dry throughout, roughly every 10-14 days in summer | Pet-safe |
| Purple Coneflower | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry; about weekly while establishing, then only in drought | Pet-safe |
| Purple Fingers | Direct sun (at least 4-6 hours) | Every 2–3 weeks in autumn through early spring; none in summer | Pet-safe |
| Purple Fountain Grass | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil dries, roughly weekly in the ground and more often in containers | Pet-safe |
| Purple Giant Hyssop | Bright indirect light (just back from a sunny window) | Every 5–7 days; tolerates periodic wet spells | Pet-safe |
| Purple Love Grass | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; more frequent during the first growing season | Pet-safe |
| Purple Moor Grass | Bright indirect light (just back from a sunny window) | Regular; do not allow to dry out completely | Pet-safe |
| Purple Mountain Saxifrage | Bright indirect light (just back from a sunny window) | Every 5–7 days during the growing season; maintain slight moisture at all times | Pet-safe |
| Purple Needlegrass | Direct sun (at least 4-6 hours) | Very low; summer-dry, winter-wet cycle | Pet-safe |
| Purple Passion Plant | Bright indirect light (just back from a sunny window) | Every 7 days in spring/summer; every 10–14 days in autumn/winter | Pet-safe |
| Purple Pitcher Plant | Direct sun (at least 4-6 hours) | Keep constantly moist by standing the pot in a tray of rainwater or distilled water at all times | Pet-safe |
| Purple Poppy Mallow | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; deeply drought-tolerant | Pet-safe |
| Purple Prickly Pear | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 2-3 weeks in summer and almost never in winter | Pet-safe |
| Purple Saxifrage | Bright indirect light (just back from a sunny window) | Water sparingly; allow soil to nearly dry between waterings in summer. | Pet-safe |
| Purple Siberian Melic | Bright indirect light (just back from a sunny window) | Every 1–2 weeks during the growing season | Pet-safe |
| Purple Vygie | Direct sun (at least 4-6 hours) | Every 3–4 weeks established; more in active growth | Pet-safe |
| Purple Waffle Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days; keep soil consistently moist | Pet-safe |
| Purple-Brown Wax Plant | Bright indirect light (just back from a sunny window) | Every 7-14 days in spring and summer; every 14-21 days in winter | Pet-safe |
| Pussy Ears Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days; allow the top half of the soil to dry out between waterings | Pet-safe |
| Pygmy Bamboo | Bright indirect light (just back from a sunny window) | 2–3 times per week in growing season, once per week in winter | Pet-safe |
| Pygmy Cactus | Bright indirect light (just back from a sunny window) | When soil is dry, about every 7-10 days in growth; keep dry in winter | Pet-safe |
| Pygmy Date Palm | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth; reduce in winter | Pet-safe |
| Pygmy Date Palm 'Trifurcata' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days in growth | Pet-safe |
| Pygmy Sundew | Direct sun (at least 4-6 hours) | Keep soil moist via a shallow tray; top up as it dries | Pet-safe |
| Pygmy Water Lily | Direct sun (at least 4-6 hours) | Permanently aquatic — crown submerged 10–25 cm (4–10 in) below water surface | Pet-safe |
| Pyrenean Saxifrage | Bright indirect light (just back from a sunny window) | Water sparingly; keep roots just moist in summer and very dry in winter. | Pet-safe |
| QIS Mix statice | Direct sun (at least 4-6 hours) | Every 7–10 days when actively growing; reduce in cool or wet weather | Pet-safe |
| Queen Cattleya | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; reduce to every 14–21 days during the dry rest after pseudobulb maturation | Pet-safe |
| Queen Elizabeth Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly, when the top few centimetres of soil are dry | Pet-safe |
| Queen Lime Red zinnia | Direct sun (at least 4-6 hours) | Regular; deep watering 2–3 times per week at soil level only | Pet-safe |
| Queen Mary Bromeliad | Bright indirect light (just back from a sunny window) | 1–2 times per week in summer | Pet-safe |
| Queen of Orchids | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce to every 14–21 days during autumn-winter rest | Pet-safe |
| Queen of Sweden Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly through the growing season, more in heat | Pet-safe |
| Queen of the Night | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days in summer; every 3-4 weeks in winter | Pet-safe |
| Queen of the Night Cereus | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 10-14 days in summer and every 4-6 weeks in winter | Pet-safe |
| Queen Pineapple | Direct sun (at least 4-6 hours) | Water when the top 3-5 cm of soil is dry, about every 7-10 days | Pet-safe |
| Queeny Lime Orange zinnia | Direct sun (at least 4-6 hours) | Every 3–5 days in warm weather; reduce in cool spells | Pet-safe |
| Quehl's Chin Cactus | Bright indirect light (just back from a sunny window) | When soil is completely dry, roughly every 10-14 days in the growing season; once every 4-6 weeks in winter | Pet-safe |
| Quehlianum Chin Cactus | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in active growth; none in winter | Pet-safe |
| Quesnel's Bromeliad | Bright indirect light (just back from a sunny window) | Top up tank every 5–7 days; soil every 10–14 days | Pet-safe |
| Quesnelia marmorata | Bright indirect light (just back from a sunny window) | Keep the central tank filled; water the mix when its top 3-4 cm is dry | Pet-safe |
| Quesnelia testudo | Bright indirect light (just back from a sunny window) | Keep the central tank filled; water the mix when its top 3-4 cm is dry | Pet-safe |
| Rabbit Foot Fern 'Plumosa' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is just dry, roughly every 5-7 days | Pet-safe |
| Rabbit's foot fern | Bright indirect light (just back from a sunny window) | When the top 1 cm (about half an inch) is dry, roughly every 5-7 days in growth | Pet-safe |
| Rabbit's Foot Prayer Plant | Bright indirect light (just back from a sunny window) | Roughly weekly; when the top 1-2 cm of soil feels dry | Pet-safe |
| Racine's Vriesea | Bright indirect light (just back from a sunny window) | Refresh cup every 7–10 days; medium every 2 weeks | Pet-safe |
| Rainbow Hedgehog Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, every 10-14 days in summer; once a month or less in winter | Pet-safe |
| Rainbow Pincushion | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-14 days in summer and once every 4-6 weeks in winter | Pet-safe |
| Raindrop Peperomia | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, often roughly weekly in the growing season | Pet-safe |
| Rainer's Bellflower | Direct sun (at least 4-6 hours) | Moderately during growth; sparingly in winter | Pet-safe |
| Rainforest Plum | Bright indirect light (just back from a sunny window) | Water 2–3 times per week in the growing season; once every 7–10 days in cooler months. | Pet-safe |
| rainha do abismo | Bright indirect light (just back from a sunny window) | Every 7–10 days in active growth; allow near-dry dormancy in winter | Pet-safe |
| Ram's Head Catasetum | Direct sun (at least 4-6 hours) | Heavily during growth; completely stopped during leafless dormancy | Pet-safe |
| Rat Tail Cactus | Bright indirect light (just back from a sunny window) | Every 1–2 weeks in spring and summer; every 3–4 weeks in winter | Pet-safe |
| Rat Tail Cactus | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in spring and summer; reduce to every 3-4 weeks in winter | Pet-safe |
| Rattlesnake plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is just dry, roughly every 5-7 days in summer and every 10-14 days in winter | Pet-safe |
| Rattlesnake Plant | Bright indirect light (just back from a sunny window) | Every 5-7 days in spring/summer; less in winter | Pet-safe |
| Ravenea Glauca | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Rayed Prosthechea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of bark is dry, roughly every 7-10 days | Pet-safe |
| Rechinger's Rosularia | Direct sun (at least 4-6 hours) | Every 2–4 weeks in the growing season; very rarely in winter | Pet-safe |
| Red Banana | Direct sun (at least 4-6 hours) | Keep evenly moist; water when the top 2-3 cm of soil is dry, every 2-4 days in active growth | Pet-safe |
| Red Cabomba | Direct sun (at least 4-6 hours) | Fully submerged aquatic; maintain in aquarium water continuously | Pet-safe |
| Red Ceratostylis | Bright indirect light (just back from a sunny window) | When the surface of the medium begins to dry, roughly every 4-6 days | Pet-safe |
| Red Dragon Venus Flytrap | Direct sun (at least 4-6 hours) | Keep in standing water year-round except dormancy | Pet-safe |
| Red Feather Clover | Direct sun (at least 4-6 hours) | Low to moderate; drought-tolerant once established | Pet-safe |
| Red Fescue | Bright indirect light (just back from a sunny window) | Infrequent — drought-tolerant once established | Pet-safe |
| Red Fir | Direct sun (at least 4-6 hours) | Regular moisture; does not tolerate summer drought well | Pet-safe |
| Red Ginger | Bright indirect light (just back from a sunny window) | Every 3–5 days in the growing season; reduce in cooler months | Pet-safe |
| red head fountain grass | Direct sun (at least 4-6 hours) | Every 7–10 days during the growing season; reduce in autumn; minimal in winter | Pet-safe |
| Red Inca Passionflower | Direct sun (at least 4-6 hours) | Every 3–5 days; keep consistently moist but not waterlogged | Pet-safe |
| Red Latan Palm | Direct sun (at least 4-6 hours) | Every 7–14 days; allow soil to partially dry between waterings | Pet-safe |
| Red Latan Palm | Direct sun (at least 4-6 hours) | When the top 5-8 cm of soil is dry, roughly every 10-14 days in summer; every 3-4 weeks in winter | Pet-safe |
| Red Margin Bamboo | Direct sun (at least 4-6 hours) | 2-3 times per week during establishment; weekly once mature | Pet-safe |
| Red Mistletoe Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Red Mombin | Direct sun (at least 4-6 hours) | Every 10–21 days; drought-tolerant when established | Pet-safe |
| Red Nerve Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days; keep soil evenly moist | Pet-safe |
| Red Orchid Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Red Osier Dogwood | Bright indirect light (just back from a sunny window) | Regularly; keep soil consistently moist | Pet-safe |
| Red Polka Dot Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days; slightly less in winter | Pet-safe |
| Red Prayer Plant | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil feels dry, roughly every 5-7 days in growth | Pet-safe |
| Red Ray Switchgrass | Direct sun (at least 4-6 hours) | Every 1-2 weeks when established | Pet-safe |
| Red Spruce | Direct sun (at least 4-6 hours) | Weekly in dry periods; naturally receives adequate moisture in humid northeastern climates | Pet-safe |
| Red Star Cluster | Direct sun (at least 4-6 hours) | Every 5–7 days; allow top 2–3 cm of soil to dry | Pet-safe |
| Red Stem Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 2–3 weeks in winter | Pet-safe |
| Red Torch Cleistocactus | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 10-14 days in summer and once every 4-6 weeks in winter | Pet-safe |
| Red Tube Pitcher | Direct sun (at least 4-6 hours) | Keep growing medium permanently moist using a tray of 2-4 cm of rainwater at all times during the growing season | Pet-safe |
| Red Twig Dogwood 'Arctic Fire' | Direct sun (at least 4-6 hours) | Keep consistently moist; tolerates wet soil | Pet-safe |
| Red Vygie | Direct sun (at least 4-6 hours) | Every 3–4 weeks established; more frequent in first season | Pet-safe |
| Red Vygie | Direct sun (at least 4-6 hours) | When the top 3 cm of soil is fully dry, roughly every 7-14 days in spring-summer; monthly or less in winter | Pet-safe |
| Red-fingered Vriesea | Bright indirect light (just back from a sunny window) | Refill cup every 7 days; flush every 3–4 weeks | Pet-safe |
| Red-Fleshed Dragon Fruit | Bright indirect light (just back from a sunny window) | Water when the top 3-5 cm of soil is dry, roughly every 7-10 days in growth; reduce in winter | Pet-safe |
| Red-fleshed Durian | Direct sun (at least 4-6 hours) | Daily watering in dry periods; 3–4 times per week when humidity is high | Pet-safe |
| Red-lipped Habenaria | Bright indirect light (just back from a sunny window) | Keep consistently moist during active growth, roughly every 3-5 days | Pet-safe |
| Red-Topped Sage | Direct sun (at least 4-6 hours) | Water when the top 3 cm of soil feels dry | Pet-safe |
| Reddish Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days (allow soil to dry out fully) | Pet-safe |
| Reed Sweet-grass | Direct sun (at least 4-6 hours) | Permanently wet; grows in standing water 15–45 cm deep | Pet-safe |
| Reed-stem orchid | Bright indirect light (just back from a sunny window) | Every 4-5 days in warm growth; about weekly when cool | Pet-safe |
| Regal Elkhorn Fern | Bright indirect light (just back from a sunny window) | Soak when the root mass nears dry, roughly every 7-14 days | Pet-safe |
| Regal Staghorn Fern | Bright indirect light (just back from a sunny window) | When the shield fronds feel dry to the touch or the mounted board is very light, soak every 7-14 days | Pet-safe |
| Regel's Sage | Direct sun (at least 4-6 hours) | Moderate; approximately 2.5 cm (1 inch) per week | Pet-safe |
| Regnell's Miltonia | Bright indirect light (just back from a sunny window) | Every 3–4 days in growth, reduce in winter | Pet-safe |
| Reichenbach's Air Plant | Bright indirect light (just back from a sunny window) | Soak 20–30 minutes once a week; mist 2–3 times weekly | Pet-safe |
| Reinwardtii Haworthia | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Reitz's sinningia | Bright indirect light (just back from a sunny window) | Every 7–10 days in active growth; cease in dormancy | Pet-safe |
| Reko's Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 6-8 weeks in winter | Pet-safe |
| Remote Air Plant | Bright indirect light (just back from a sunny window) | Soak 20–30 minutes once a week; mist 2–3 times weekly between soaks | Pet-safe |
| Renny Miniature Rose | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 2-4 days in summer | Pet-safe |
| Resurrection Spike Moss | Bright indirect light (just back from a sunny window) | Can be kept moist year-round or allowed to dry fully and rehydrated on demand | Pet-safe |
| Rex Spider Orchid | Bright indirect light (just back from a sunny window) | 2–3 times per week during active growth; weekly or less in cooler rest period | Pet-safe |
| Rhipsalidopsis gaertneri | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Rhipsalis 'Cashero' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| Rhombus-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in spring and summer; every 3–4 weeks in winter | Pet-safe |
| Rhyncholaeliocattleya 'Pastoral Innocence' | Bright indirect light (just back from a sunny window) | When the mix nears dry, roughly every 5-7 days in growth; reduced after flowering | Pet-safe |
| Ribbed Brain Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in the growing season; reduce to once a month or less in winter | Pet-safe |
| Ribbon Bush | Bright indirect light (just back from a sunny window) | Every 7–10 days in growth; reduce to every 14 days in winter rest | Pet-safe |
| Riberry | Bright indirect light (just back from a sunny window) | Weekly during establishment; every 10–14 days for mature plants in mild conditions | Pet-safe |
| Ric Rac Cactus | Bright indirect light (just back from a sunny window) | When the top 2-4 cm of compost is dry, roughly every 7-10 days in summer | Pet-safe |
| rice cutgrass | Bright indirect light (just back from a sunny window) | Constantly moist to permanently flooded; thrives in standing water at or just above soil level | Pet-safe |
| Ridged Cape Primrose | Bright indirect light (just back from a sunny window) | Every 7–14 days in the growing season; very sparingly in winter | Pet-safe |
| Ridley's Hohenbergia | Bright indirect light (just back from a sunny window) | Tank weekly; soil every 10–14 days | Pet-safe |
| Ridley's Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Rigid Draba | Direct sun (at least 4-6 hours) | Every 10–14 days during growth; almost none in winter | Pet-safe |
| Rigid Goldenrod | Direct sun (at least 4-6 hours) | Low — drought tolerant once established | Pet-safe |
| Rincon Thelocactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in the growing season; rarely in winter. | Pet-safe |
| Ringed Sage | Direct sun (at least 4-6 hours) | Low to moderate; allow soil to dry between waterings | Pet-safe |
| Rise 'n' Shine Miniature Rose | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, around every 2-4 days in summer | Pet-safe |
| river clog plant | Bright indirect light (just back from a sunny window) | Every 6–9 days in spring–summer, every 10–14 days in winter | Pet-safe |
| Robert Chapman heather | Direct sun (at least 4-6 hours) | Regular watering for the first season; drought-tolerant once established | Pet-safe |
| Robert Young Bamboo | Direct sun (at least 4-6 hours) | 2-3 times per week when establishing; weekly once established | Pet-safe |
| Robin Hill serviceberry | Bright indirect light (just back from a sunny window) | Weekly during establishment; every 2–3 weeks once established | Pet-safe |
| Roborowsky's Sage | Direct sun (at least 4-6 hours) | Moderate; keep soil evenly moist | Pet-safe |
| Rochford's Holly Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Rock Candytuft | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; minimal in winter | Pet-safe |
| Rock Cress | Direct sun (at least 4-6 hours) | Low; water only when soil has dried out, roughly every 10–14 days in summer | Pet-safe |
| Rock Jasmine | Direct sun (at least 4-6 hours) | Water moderately in spring and summer; reduce in autumn and winter | Pet-safe |
| Rock Lily | Bright indirect light (just back from a sunny window) | Every 5–10 days during active growth; reduce significantly in winter rest | Pet-safe |
| Rock Liveforever | Direct sun (at least 4-6 hours) | Every 3–5 weeks in summer (near-dry dormancy), every 2–3 weeks in winter (active season) | Pet-safe |
| Rock Palm | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days in summer; every 2-3 weeks in winter | Pet-safe |
| Rock Speedwell | Bright indirect light (just back from a sunny window) | Once every 7–10 days during the growing season; reduce markedly in winter. | Pet-safe |
| Rocket candytuft | Direct sun (at least 4-6 hours) | Every 7–14 days; keep moist during establishment, reduce once rooted | Pet-safe |
| Rocket Mix Snapdragon | Direct sun (at least 4-6 hours) | When the top 2–3 cm of soil is dry, roughly every 5–7 days | Pet-safe |
| Rocket Mixed snapdragon | Direct sun (at least 4-6 hours) | Every 5–7 days; maintain consistent soil moisture | Pet-safe |
| Rocky Mountain Douglas Fir | Direct sun (at least 4-6 hours) | Moderate during establishment; drought-tolerant once established | Pet-safe |
| Rodigas' Vriesea | Bright indirect light (just back from a sunny window) | Refill the central cup every 5-7 days; water the potting medium when the top 2 cm is dry, roughly every 10-14 days | Pet-safe |
| Roland-Gosselin's Air Plant | Bright indirect light (just back from a sunny window) | Soak 20–30 minutes once a week; mist 2–3 times weekly | Pet-safe |
| Roller Jovibarba | Direct sun (at least 4-6 hours) | Every 2–4 weeks in summer; minimal in winter | Pet-safe |
| Rollers Houseleek | Direct sun (at least 4-6 hours) | Every 14-21 days in spring and summer; barely at all in winter | Pet-safe |
| Rose | Direct sun (at least 4-6 hours) | Deep watering once a week, more in heat | Pet-safe |
| Rose campion | Direct sun (at least 4-6 hours) | Every 10–14 days; very drought-tolerant once established | Pet-safe |
| Rose Grass | Direct sun (at least 4-6 hours) | Moderate during growth; almost dry in winter dormancy | Pet-safe |
| Rose of Jericho (Resurrection Plant) | Bright indirect light (just back from a sunny window) | Keep moist; refresh water frequently | Pet-safe |
| Rose of Sharon 'Blue Bird' | Direct sun (at least 4-6 hours) | Weekly while establishing, then during dry or hot spells | Pet-safe |
| Rose of Sharon 'Diana' | Direct sun (at least 4-6 hours) | Weekly to establish, then during dry and hot periods | Pet-safe |
| Rose Pincushion Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 2 weeks in spring and summer; little to none in winter | Pet-safe |
| Rose Pincushion Cactus | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 10-14 days in the growing season; once every 4-6 weeks in winter | Pet-safe |
| Rose-Painted Calathea | Bright indirect light (just back from a sunny window) | Roughly weekly; when the top 2-3 cm (1 inch) of soil dries | Pet-safe |
| Rose-painted Calathea (Dottie) | Bright indirect light (just back from a sunny window) | Roughly weekly; water when the top 2-3 cm (1 inch) of soil dries | Pet-safe |
| Rosebay Willowherb | Direct sun (at least 4-6 hours) | Minimal once established; tolerates both dry and wet soils | Pet-safe |
| Roseraie de l'Hay Rose | Direct sun (at least 4-6 hours) | Weekly during establishment; drought-tolerant once settled | Pet-safe |
| Rosinweed | Direct sun (at least 4-6 hours) | Every 2-3 weeks once established | Pet-safe |
| Roth's Air Plant | Bright indirect light (just back from a sunny window) | Mist 2–3 times a week; soak 10–20 minutes weekly if conditions are dry | Pet-safe |
| Rothschild's Bulbophyllum | Bright indirect light (just back from a sunny window) | Water when the top layer of the medium begins to dry, roughly every 3-5 days | Pet-safe |
| Rough Bamboo | Direct sun (at least 4-6 hours) | Frequently; keep moist, especially when establishing | Pet-safe |
| Rough Blazing Star | Direct sun (at least 4-6 hours) | Water to establish, then only during extended drought | Pet-safe |
| Rough Coelogyne | Bright indirect light (just back from a sunny window) | Every 3–5 days in active growth; reduce slightly in winter | Pet-safe |
| Rough Coneflower | Direct sun (at least 4-6 hours) | Every 2-3 weeks once established | Pet-safe |
| Rough Hawk's-beard | Direct sun (at least 4-6 hours) | Low — drought-tolerant, especially in the rosette year | Pet-safe |
| Rough Hawkbit | Direct sun (at least 4-6 hours) | Low — requires water only during prolonged summer drought | Pet-safe |
| Rough Tree Fern | Bright indirect light (just back from a sunny window) | Keep consistently moist; water every 3-5 days in the growing season, every 7-10 days in cooler months | Pet-safe |
| Round-leaf Cape Primrose | Bright indirect light (just back from a sunny window) | Every 7–10 days in the growing season; reduce significantly in winter | Pet-safe |
| Round-leaf Rosularia | Direct sun (at least 4-6 hours) | Every 14–21 days during spring and summer; minimal in winter | Pet-safe |
| Round-leaved Sage | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth | Pet-safe |
| Roundhead Prairie Clover | Direct sun (at least 4-6 hours) | Once established, water deeply every 2–3 weeks in summer; no supplemental water needed once the taproot is mature | Pet-safe |
| Roundleaf Pickerelweed | Direct sun (at least 4-6 hours) | Permanently aquatic — plant in still or slow-moving water 5–20 cm (2–8 in) deep or in consistently waterlogged marginal soil. | Pet-safe |
| Royal Blue Aubrieta | Direct sun (at least 4-6 hours) | Weekly in spring and autumn; infrequently in summer | Pet-safe |
| Royal Flush Split Rock | Direct sun (at least 4-6 hours) | Only during active growth: late summer through winter and into early spring; stop completely while leaves are splitting | Pet-safe |
| Royal Red Lipstick Plant | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of potting mix is dry, roughly every 7-10 days in the growing season | Pet-safe |
| Royal Star Magnolia | Direct sun (at least 4-6 hours) | Weekly while young; in summer droughts for established shrubs | Pet-safe |
| Rubenza cosmos | Direct sun (at least 4-6 hours) | Every 5–7 days; drought tolerant once established | Pet-safe |
| Ruby Cascade Peperomia | Bright indirect light (just back from a sunny window) | Roughly every 10-14 days; let the top 2-3 cm dry out first | Pet-safe |
| Ruby Cascade Peperomia | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, about every 7-14 days | Pet-safe |
| Ruby Glow Peperomia | Bright indirect light (just back from a sunny window) | Roughly every 7-10 days in spring and summer; much less in winter | Pet-safe |
| Ruby Glow Peperomia | Bright indirect light (just back from a sunny window) | Every 14–21 days in spring/summer; every 4–6 weeks in winter | Pet-safe |
| Ruby Glow Peperomia | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Rudbeckia 'Becky Mixed' | Direct sun (at least 4-6 hours) | Every 7-10 days once established; keep containers evenly moist | Pet-safe |
| Rudbeckia 'Goldsturm' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days; very drought-tolerant once established | Pet-safe |
| Rudbeckia 'Pot of Gold' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Rudbeckia 'Prairie Sun' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Rufa Fountain Bamboo | Bright indirect light (just back from a sunny window) | Regularly during the growing season, approximately every 5–7 days; keep soil consistently moist but not waterlogged | Pet-safe |
| Ruffled Echeveria | Bright indirect light (just back from a sunny window) | When the soil dries fully, roughly every 10-14 days in growth | Pet-safe |
| Rugosa Rose | Direct sun (at least 4-6 hours) | weekly when establishing, monthly once established | Pet-safe |
| Rusch's Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during the active autumn-to-spring period; completely dry in summer | Pet-safe |
| Russian Olive | Direct sun (at least 4-6 hours) | Low; highly drought-tolerant | Pet-safe |
| Rustica Rubra magnolia | Direct sun (at least 4-6 hours) | Regularly when young; moderate once established | Pet-safe |
| Rustyback Fern | Bright indirect light (just back from a sunny window) | Infrequently; allow to dry between waterings | Pet-safe |
| Ryegrass Air Plant | Bright indirect light (just back from a sunny window) | Mist 2–3 times per week or soak for 20 minutes weekly | Pet-safe |
| Sabal Bermudana | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, roughly every 10-14 days once established | Pet-safe |
| Sabal Mexicana | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, roughly every 10-14 days once established | Pet-safe |
| Sad Bromeliad | Bright indirect light (just back from a sunny window) | Refresh central cup every 5–7 days; soil every 2–3 weeks | Pet-safe |
| Saffron Air Plant | Direct sun (at least 4-6 hours) | Twice weekly in summer, once weekly in winter | Pet-safe |
| Saintpaulia 'Buckeye Fanfare' | Bright indirect light (just back from a sunny window) | When the top of the mix is just dry, about every 5-7 days | Pet-safe |
| Saintpaulia 'Jolly Ellie' | Bright indirect light (just back from a sunny window) | When the surface of the mix is just dry, roughly every 5-7 days | Pet-safe |
| Saintpaulia 'Mac's Black Pearl' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil feels dry, roughly every 5-7 days | Pet-safe |
| Saintpaulia 'Ness' Dipity' | Bright indirect light (just back from a sunny window) | When the top of the mix is just dry to the touch, about every 5-7 days | Pet-safe |
| Saintpaulia 'Optimara Montana' | Bright indirect light (just back from a sunny window) | When the surface of the mix is just dry, roughly every 5-7 days | Pet-safe |
| Saintpaulia 'Powderpuff' | Bright indirect light (just back from a sunny window) | When the surface of the mix is just dry, roughly every 5-7 days | Pet-safe |
| Saintpaulia 'Rob's Boolaroo' | Bright indirect light (just back from a sunny window) | When the top of the mix feels just dry, typically every 5-7 days | Pet-safe |
| Saintpaulia 'Winter Lace' | Bright indirect light (just back from a sunny window) | When the top of the mix feels just dry, about every 5-7 days | Pet-safe |
| Sakhalin Fir | Direct sun (at least 4-6 hours) | Moderate; water regularly during establishment | Pet-safe |
| Sally Holmes Rose | Direct sun (at least 4-6 hours) | Deep watering once or twice weekly | Pet-safe |
| Salmon Queen scabiosa | Direct sun (at least 4-6 hours) | Every 5–7 days in active growth; reduce in cool spells | Pet-safe |
| Salvia | Direct sun (at least 4-6 hours) | Weekly watering | Pet-safe |
| Salvia 'Hot Lips' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry; weekly while establishing, then infrequently | Pet-safe |
| Salvia 'May Night' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry; roughly weekly, less once established | Pet-safe |
| Salvia × sylvestris 'Blauhügel' | Direct sun (at least 4-6 hours) | When top 3-5 cm of soil is dry, roughly every 7-10 days once established | Pet-safe |
| Salvia farinacea 'Evolution Violet' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 4-7 days once established | Pet-safe |
| Salvia farinacea 'Strata' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 4-7 days once established | Pet-safe |
| Salvia nemorosa 'Ostfriesland' | Direct sun (at least 4-6 hours) | When top 3-5 cm of soil is dry, about every 7-10 days once established | Pet-safe |
| Salvia splendens 'Vista Red' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 2-4 days in summer heat | Pet-safe |
| Salvia verticillata 'Purple Rain' | Direct sun (at least 4-6 hours) | When top 3-5 cm of soil is dry, about every 7-10 days once established | Pet-safe |
| Samaipatensis Cactus | Direct sun (at least 4-6 hours) | When the soil is dry, about every 10-14 days in summer; sparing in winter | Pet-safe |
| San Diego Sage | Direct sun (at least 4-6 hours) | Low; drought tolerant once established | Pet-safe |
| San Gabriel Mountains Liveforever | Bright indirect light (just back from a sunny window) | Every 2–3 weeks autumn through spring; none or minimal in summer | Pet-safe |
| San Jose Hesper Palm | Direct sun (at least 4-6 hours) | Every 2–3 weeks during growth; monthly or less when established | Pet-safe |
| San Jose Hesper Palm | Direct sun (at least 4-6 hours) | When the top 5-7 cm of soil is dry, roughly every 10-14 days in the growing season; every 3-4 weeks in winter | Pet-safe |
| Sand Bluestem | Direct sun (at least 4-6 hours) | Minimal — seasonal rainfall only in most settings | Pet-safe |
| Sand Couch Grass | Direct sun (at least 4-6 hours) | Rarely — established plants rely on rainfall and groundwater | Pet-safe |
| Sand Crown Cactus | Direct sun (at least 4-6 hours) | Every 10-14 days in the growing season; once every 4-6 weeks in winter | Pet-safe |
| Sand Lovegrass | Direct sun (at least 4-6 hours) | When the top 4-6 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Sand Phlox | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; drought-tolerant | Pet-safe |
| Sand Reed | Direct sun (at least 4-6 hours) | Rarely — depends on deep soil moisture in sand | Pet-safe |
| Sand Sedge | Direct sun (at least 4-6 hours) | Very infrequent — drought-adapted | Pet-safe |
| Sander's Billbergia | Bright indirect light (just back from a sunny window) | Every 1–2 weeks (cup); soil when dry | Pet-safe |
| Sander's Butterfly Orchid | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of the potting medium is dry, roughly every 5-7 days | Pet-safe |
| Sander's Maxillaria | Bright indirect light (just back from a sunny window) | Every 4–6 days year-round; never allow to fully dry out | Pet-safe |
| Sander's Maxillaria | Bright indirect light (just back from a sunny window) | When the top 2 cm of the mix feels dry, roughly every 5-7 days | Pet-safe |
| Sander's Vanda | Direct sun (at least 4-6 hours) | Daily in warmth; every 2-3 days when cool and dim | Pet-safe |
| Sandy Sulcorebutia | Direct sun (at least 4-6 hours) | Every 2–3 weeks in spring and summer; very sparingly or not at all in winter | Pet-safe |
| Sanguine Coneflower | Direct sun (at least 4-6 hours) | Weekly during first season; every 3–4 weeks once established | Pet-safe |
| Sanguisorba 'Tanna' | Direct sun (at least 4-6 hours) | Keep soil moist but not waterlogged; water every 4-7 days in dry weather | Pet-safe |
| Sanguisorba menziesii | Direct sun (at least 4-6 hours) | Keep soil moist; water every 3-5 days in dry spells | Pet-safe |
| Sanguisorba officinalis | Direct sun (at least 4-6 hours) | Keep soil moist; water every 4-7 days in dry spells | Pet-safe |
| Santa Barbara Island Liveforever | Direct sun (at least 4-6 hours) | Every 1–2 weeks in the cool season (October–March); none from June–September | Pet-safe |
| Santa Rita Prickly Pear | Direct sun (at least 4-6 hours) | Sparingly when soil is fully dry, about every 3-4 weeks in summer; nearly none in winter | Pet-safe |
| Sanvitalia procumbens 'Mandarin Orange' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, roughly every 2-4 days in summer containers | Pet-safe |
| Sanvitalia procumbens 'Sunvy Yellow' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, roughly every 2-4 days in summer containers | Pet-safe |
| Sapphire Tower | Direct sun (at least 4-6 hours) | every 7–10 days in the growing season, every 21–28 days in winter | Pet-safe |
| Sarcochilus ceciliae | Bright indirect light (just back from a sunny window) | Water every 2-4 days in growth, allowing the medium to approach dryness between waterings | Pet-safe |
| Sarcochilus falcatus | Bright indirect light (just back from a sunny window) | Water every 2-3 days, keeping the roots moist but well aired | Pet-safe |
| Sarcochilus hartmannii | Bright indirect light (just back from a sunny window) | Water every 2-4 days, keeping the medium damp but never waterlogged | Pet-safe |
| Sarracenia 'Juthatip Soper' | Direct sun (at least 4-6 hours) | Keep permanently wet with the tray method, standing in 1-3 cm of water during the growing season | Pet-safe |
| Sarracenia × catesbaei | Direct sun (at least 4-6 hours) | Keep media constantly wet; stand the pot in 1-2 cm of water during the growing season | Pet-safe |
| Sarracenia × excellens | Direct sun (at least 4-6 hours) | Permanently moist; tray-water in 1-2 cm of pure water through the growing season | Pet-safe |
| Sarracenia leucophylla 'Tarnok' | Direct sun (at least 4-6 hours) | Keep constantly wet; stand in 1-2 cm of pure water during the growing season | Pet-safe |
| Sarracenia Rubra | Direct sun (at least 4-6 hours) | Keep the soil constantly wet; stand the pot in 1-3 cm of water during the growing season | Pet-safe |
| Sarracenia-like sun pitcher | Bright indirect light (just back from a sunny window) | Daily; keep media permanently moist | Pet-safe |
| Sasanqua Camellia | Bright indirect light (just back from a sunny window) | Keep soil evenly moist; water deeply once or twice weekly in the growing season, more in heat | Pet-safe |
| Sasanqua Camellia 'Yuletide' | Bright indirect light (just back from a sunny window) | About weekly, more in summer heat; water when the top 3-5 cm of soil is dry | Pet-safe |
| Satin Pellionia (Trailing Watermelon Begonia) | Bright indirect light (just back from a sunny window) | Keep evenly moist; water when the top 1-2 cm feels barely dry, roughly every 4-7 days in growth | Pet-safe |
| Saucer Magnolia | Direct sun (at least 4-6 hours) | Weekly while establishing, then during dry spells | Pet-safe |
| Saucer Magnolia | Bright indirect light (just back from a sunny window) | Weekly during establishment; every 10–14 days once mature in dry spells | Pet-safe |
| Saunders' Vriesea | Bright indirect light (just back from a sunny window) | Keep cup filled; medium dry-down every 2–3 weeks | Pet-safe |
| Sawtooth Sunflower | Direct sun (at least 4-6 hours) | Weekly when young; every 1-2 weeks when established | Pet-safe |
| Sawtooth Venus flytrap | Direct sun (at least 4-6 hours) | Keep continuously moist via the tray method | Pet-safe |
| Scabiosa columbaria 'Butterfly Blue' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil dries; about weekly in the growing season | Pet-safe |
| Scabrosa Rugosa Rose | Direct sun (at least 4-6 hours) | Weekly while establishing; drought-tolerant afterwards | Pet-safe |
| Scaly Blazing Star | Direct sun (at least 4-6 hours) | Water to establish, then only in prolonged drought | Pet-safe |
| Scaly-stem Columnea | Bright indirect light (just back from a sunny window) | Every 5–8 days in summer, every 10–14 days in winter | Pet-safe |
| Scarlet Ball Cactus | Direct sun (at least 4-6 hours) | When the mix is dry, about every 10-14 days in growth; sparingly in winter | Pet-safe |
| Scarlet Ball Cactus | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, every 7-10 days in spring and summer; every 3-5 weeks in autumn; very sparingly in winter | Pet-safe |
| Scarlet Banana | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Scarlet Bidi-Bidi | Direct sun (at least 4-6 hours) | Fortnightly once established; drought-tolerant | Pet-safe |
| Scarlet Cleistocactus | Bright indirect light (just back from a sunny window) | When the soil is dry, about every 7-10 days in summer; sparing in winter | Pet-safe |
| Scarlet Drymonia | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 10–14 days in winter. | Pet-safe |
| Scarlet Freesia | Direct sun (at least 4-6 hours) | Low to moderate during active growth; dry during summer dormancy | Pet-safe |
| Scarlet Giant Hyssop | Direct sun (at least 4-6 hours) | Every 7–10 days until established; every 14 days or less once established | Pet-safe |
| Scarlet Ginger Lily | Bright indirect light (just back from a sunny window) | Keep soil consistently moist during active growth, watering roughly every 4-6 days | Pet-safe |
| Scarlet Maxillaria | Bright indirect light (just back from a sunny window) | Every 2–3 days in growth, reduce slightly in winter | Pet-safe |
| Scattered-flower Guzmania | Bright indirect light (just back from a sunny window) | Top up central cup weekly; flush monthly | Pet-safe |
| Scepter'd Isle Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season; more in heat, sandy soil or containers | Pet-safe |
| Schied's Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 6-8 weeks in winter | Pet-safe |
| Schlim's Phragmipedium | Bright indirect light (just back from a sunny window) | Keep the medium consistently moist — water when the top 1-2 cm shows any drying | Pet-safe |
| Schlumbergera 'White Christmas' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Schlumbergera × buckleyi | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Schwantes' Living Stone | Direct sun (at least 4-6 hours) | Every 10-21 days during the active autumn-to-spring period; none in summer | Pet-safe |
| Schwantes' Living Stones | Direct sun (at least 4-6 hours) | Every 3–4 weeks in autumn; withhold in summer and winter | Pet-safe |
| Scott's Angraecum | Bright indirect light (just back from a sunny window) | Daily during growing season (approx. 10 months), every other day in December–January | Pet-safe |
| Scrub Palmetto | Direct sun (at least 4-6 hours) | Rarely after establishment — every 3–6 weeks in extended dry spells | Pet-safe |
| Scurfy Laelia | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; once every 2–3 weeks during summer dry rest | Pet-safe |
| Sea Campion | Direct sun (at least 4-6 hours) | Every 1–2 weeks; drought-tolerant once established | Pet-safe |
| Sea Lettuce | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in winter (active growth); monthly or less in summer (dormancy) | Pet-safe |
| Sea Sandwort | Direct sun (at least 4-6 hours) | Infrequently — allow soil to dry between waterings | Pet-safe |
| Sea Stock | Direct sun (at least 4-6 hours) | Weekly during active growth (allow surface to dry slightly between waterings) | Pet-safe |
| Sea Thrift | Direct sun (at least 4-6 hours) | Every 10–14 days; drought-tolerant once established | Pet-safe |
| Sea Urchin Cactus | Direct sun (at least 4-6 hours) | When the top of the soil is dry, roughly weekly to fortnightly in summer; keep nearly dry in winter | Pet-safe |
| Sea Urchin Copiapoa | Direct sun (at least 4-6 hours) | Every 14-21 days in summer; once a month or completely dry in winter | Pet-safe |
| Seabeach Sandwort | Direct sun (at least 4-6 hours) | Infrequently — highly drought-tolerant once established | Pet-safe |
| Sedum | Direct sun (at least 4-6 hours) | When the soil is dry, every 10-14 days for potted plants | Pet-safe |
| Sedum 'Autumn Joy' | Direct sun (at least 4-6 hours) | When soil is dry several centimeters down, roughly every 10-14 days | Pet-safe |
| Sedum 'Matrona' | Direct sun (at least 4-6 hours) | When soil is dry a few centimeters down, roughly every 10-14 days | Pet-safe |
| Sedum burrito | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 1-2 weeks in summer | Pet-safe |
| Sedum clavatum | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 1-2 weeks in summer | Pet-safe |
| Sedum dasyphyllum | Direct sun (at least 4-6 hours) | Every 1-2 weeks when soil is fully dry in growth; sparingly in winter | Pet-safe |
| Sedum hernandezii | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in summer, very sparingly in winter | Pet-safe |
| Sedum palmeri | Direct sun (at least 4-6 hours) | When the soil is dry, about every 10-14 days in summer, sparingly in winter | Pet-safe |
| Sedum spectabile 'Iceberg' | Direct sun (at least 4-6 hours) | When soil is dry a few centimeters down, about every 10-14 days | Pet-safe |
| Sedum telephium 'Purple Emperor' | Direct sun (at least 4-6 hours) | When soil is dry a few centimeters down, about every 10-14 days | Pet-safe |
| Sekete's Restrepia | Bright indirect light (just back from a sunny window) | Every 2-4 days; keep evenly moist | Pet-safe |
| Selenicereus anthonyanus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-10 days in summer | Pet-safe |
| Selenicereus pteranthus | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-14 days in summer | Pet-safe |
| Sellow's Sinningia | Bright indirect light (just back from a sunny window) | Moderate during growth; none during dormancy | Pet-safe |
| Sempervivum 'Black' | Direct sun (at least 4-6 hours) | When soil is fully dry, every 10-14 days in growth; very little in winter | Pet-safe |
| Sempervivum 'Commander Hay' | Direct sun (at least 4-6 hours) | Every 2-3 weeks when fully dry in growth; minimal in winter | Pet-safe |
| Sempervivum 'Emerald Empress' | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 1-2 weeks in summer, far less if grown outdoors in the ground | Pet-safe |
| Sempervivum 'Killer' | Direct sun (at least 4-6 hours) | Every 2-3 weeks when soil is fully dry in growth; almost none in winter | Pet-safe |
| Sempervivum 'Oddity' | Direct sun (at least 4-6 hours) | When the soil is fully dry, sparingly; roughly every 2 weeks in summer and minimal in winter | Pet-safe |
| Sempervivum 'Pacific Blue Ice' | Direct sun (at least 4-6 hours) | Every 2-3 weeks when soil is fully dry in growth; minimal in winter | Pet-safe |
| Sempervivum 'Red Lion' | Direct sun (at least 4-6 hours) | Every 2-3 weeks when soil is fully dry in growth; almost none in winter | Pet-safe |
| Sempervivum 'Reinhard' | Direct sun (at least 4-6 hours) | Every 2-3 weeks when fully dry in growth; minimal in winter | Pet-safe |
| Sempervivum calcareum | Direct sun (at least 4-6 hours) | Every 2-3 weeks in growth, only when the soil is fully dry; little to none in winter | Pet-safe |
| Sempervivum heuffelii | Direct sun (at least 4-6 hours) | When the soil is fully dry, sparingly; roughly every 2 weeks in summer and very little in winter | Pet-safe |
| Sempervivum montanum | Direct sun (at least 4-6 hours) | Every 2-3 weeks when soil is fully dry in growth; keep nearly dry in winter | Pet-safe |
| Senegal Date Palm | Direct sun (at least 4-6 hours) | When the top few centimetres of soil dry, roughly every 5-10 days | Pet-safe |
| Senegal Date Palm | Direct sun (at least 4-6 hours) | Water deeply every 7-14 days in active growth; more drought-tolerant once established | Pet-safe |
| Senita Cactus | Direct sun (at least 4-6 hours) | Every 2–3 weeks in summer; once a month or less in winter | Pet-safe |
| Sensation Mix Cosmos | Direct sun (at least 4-6 hours) | When the top 3–5 cm of soil is dry, roughly every 7–10 days once established | Pet-safe |
| Sensation Mixed cosmos | Direct sun (at least 4-6 hours) | Once or twice weekly until established; then only during prolonged dry spells | Pet-safe |
| Sensation Mixed cosmos | Direct sun (at least 4-6 hours) | Every 5–7 days; very drought tolerant once established | Pet-safe |
| Serissa Bonsai | Bright indirect light (just back from a sunny window) | When the surface just starts to dry, often every 1-3 days in growth | Pet-safe |
| Serpens Wax Plant | Bright indirect light (just back from a sunny window) | Every 7-10 days in growth; far less in winter | Pet-safe |
| Sessile-Leaf Tick Trefoil | Bright indirect light (just back from a sunny window) | Water every 10–14 days during establishment; once established it is drought-tolerant in typical dry woodland and upland conditions | Pet-safe |
| Seven-Spined Discocactus | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, approximately every 10-14 days in the growing season; once a month or less in winter | Pet-safe |
| Sexy Rexy Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly | Pet-safe |
| Shadscale Saltbush | Direct sun (at least 4-6 hours) | Every 3–5 weeks during establishment, then rainfall only | Pet-safe |
| Shady Sage | Bright indirect light (just back from a sunny window) | Allow soil to dry between waterings | Pet-safe |
| Shagbark manzanita | Direct sun (at least 4-6 hours) | Every 3–4 weeks once established; more frequent during the first 2 years | Pet-safe |
| Shaggy Trichodiadema | Direct sun (at least 4-6 hours) | When soil is completely dry, approximately every 10-14 days during winter-spring growth period; very sparingly (once monthly) in summer dormancy | Pet-safe |
| Shampoo Ginger | Bright indirect light (just back from a sunny window) | Every 3–5 days in the growing season; minimal to none during winter dormancy | Pet-safe |
| Shand's Gibbaeum | Direct sun (at least 4-6 hours) | Every 2–4 weeks during active growth (autumn and spring); withheld in summer dormancy and reduced to once monthly or less in winter | Pet-safe |
| Shark Teeth Venus flytrap | Direct sun (at least 4-6 hours) | Continuously moist via tray watering; slightly drier in winter | Pet-safe |
| Shark-Toothed Neoregelia | Bright indirect light (just back from a sunny window) | Refill the central cup every 5-7 days; water the medium lightly when the top 3 cm is dry, roughly every 14 days | Pet-safe |
| Sharp-fruited Abutilon | Direct sun (at least 4-6 hours) | Every 7–10 days when young; fortnightly once established | Pet-safe |
| Sharp-leaf Columnea | Bright indirect light (just back from a sunny window) | When top 2–3 cm of compost dries out | Pet-safe |
| Sharp-Leaf Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days during active growth; reduce in winter | Pet-safe |
| sheep's fescue | Direct sun (at least 4-6 hours) | Very low; once established, relies on natural rainfall in temperate climates; water monthly if needed during prolonged drought | Pet-safe |
| Sheep's Fescue | Direct sun (at least 4-6 hours) | Established plants are very drought-tolerant; water only during severe prolonged drought, roughly every 14-21 days in dry conditions | Pet-safe |
| Shenandoah Switchgrass | Direct sun (at least 4-6 hours) | Weekly during establishment (first season); monthly or as needed once established | Pet-safe |
| Sheridan Spire Dawn Redwood | Direct sun (at least 4-6 hours) | Regularly — maintain consistently moist soil | Pet-safe |
| Shield Sundew | Direct sun (at least 4-6 hours) | Tray-water during active growth (autumn–spring); completely dry in summer. | Pet-safe |
| Shingle Plant Hoya | Bright indirect light (just back from a sunny window) | When the mix is almost completely dry, roughly every 10-14 days in summer | Pet-safe |
| Shining Cinquefoil | Direct sun (at least 4-6 hours) | Every 10–14 days during active growth; very sparsely in winter | Pet-safe |
| Shining Cranesbill | Bright indirect light (just back from a sunny window) | Low; water only in prolonged drought | Pet-safe |
| Shining Fuchsia | Bright indirect light (just back from a sunny window) | Moderate during growth; minimal in winter | Pet-safe |
| Shining Pondweed | Direct sun (at least 4-6 hours) | Fully submerged — permanently aquatic; water is the growing medium, not an irrigation schedule | Pet-safe |
| Shining Sundew | Bright indirect light (just back from a sunny window) | Tray method — keep 1 cm of pure water at all times | Pet-safe |
| Shooting Star Hoya | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-9 days in growth | Pet-safe |
| Shore Pine | Direct sun (at least 4-6 hours) | When the top 2-3 cm of the mix is dry, often daily in summer heat and every 3-5 days in cool weather | Pet-safe |
| Short-leaved Deuterocohnia | Direct sun (at least 4-6 hours) | Every 2 weeks in summer; monthly or less in winter | Pet-safe |
| Short-stalk Columnea | Bright indirect light (just back from a sunny window) | When top 2–3 cm of mix dries | Pet-safe |
| Short-stalk Sophronitis | Bright indirect light (just back from a sunny window) | When the bark surface dries, roughly every 5-7 days in summer; every 10-14 days in winter | Pet-safe |
| Short-Stemmed Monanthes | Bright indirect light (just back from a sunny window) | Every 10–14 days in active growth; less in hot summer months | Pet-safe |
| Short-winged Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Showy Barkeria | Bright indirect light (just back from a sunny window) | Freely every 5-7 days in active growth; near-dry rest from leaf drop until new growth in spring | Pet-safe |
| Showy Border Forsythia | Direct sun (at least 4-6 hours) | Every 7-14 days during dry spells; very drought-tolerant once established | Pet-safe |
| Showy Coelogyne | Bright indirect light (just back from a sunny window) | Every 4–6 days in active growth; every 7–10 days in late winter | Pet-safe |
| Showy Corytoplectus | Bright indirect light (just back from a sunny window) | Every 5–7 days in the growing season; reduce to every 10–14 days in winter. | Pet-safe |
| Showy Cranesbill | Bright indirect light (just back from a sunny window) | Weekly during spring and summer; minimal in autumn and winter | Pet-safe |
| Showy Disocactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, approximately every 7-10 days in spring and summer; reduce to every 3-4 weeks in winter | Pet-safe |
| Showy Goldenrod | Direct sun (at least 4-6 hours) | Drought-tolerant once established; water in extended dry spells only | Pet-safe |
| Showy Laelia | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; once every 2–4 weeks during dry rest | Pet-safe |
| Showy Lipstick Vine | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of potting mix is dry, roughly every 7-10 days in the growing season | Pet-safe |
| Showy Sinningia | Bright indirect light (just back from a sunny window) | Keep soil slightly moist during growth; dry off in autumn | Pet-safe |
| Showy Tick Trefoil | Direct sun (at least 4-6 hours) | Water weekly to every 10 days during dry spells in the first season; once established, tolerates moderate drought but prefers consistently moist soil | Pet-safe |
| Shrimp Plant | Bright indirect light (just back from a sunny window) | When the top 2–3 cm (1 in) of compost dries out | Pet-safe |
| Shrubby Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks from late summer through early spring; completely dry in June–August | Pet-safe |
| Shrubby Indian Mallow | Direct sun (at least 4-6 hours) | Every 10–14 days in summer; monthly or as needed in winter | Pet-safe |
| Siberian Fir | Direct sun (at least 4-6 hours) | Moderate; relies on snowmelt and seasonal rain | Pet-safe |
| Siberian Larch | Direct sun (at least 4-6 hours) | Weekly during establishment; low once established | Pet-safe |
| Siebold's Magnolia | Bright indirect light (just back from a sunny window) | Weekly throughout the growing season; reduce in winter | Pet-safe |
| Sierra Cliff Brake Fern | Bright indirect light (just back from a sunny window) | When the soil is completely dry, roughly every 10-21 days depending on season and environment | Pet-safe |
| Sikkim Banana | Bright indirect light (just back from a sunny window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days during active growth | Pet-safe |
| Sikkim Larch | Direct sun (at least 4-6 hours) | Weekly during establishment, less once established | Pet-safe |
| Silky Aster | Direct sun (at least 4-6 hours) | Low — drought tolerant | Pet-safe |
| silky thread grass | Direct sun (at least 4-6 hours) | Once established, water only during extended drought; every 2–3 weeks in hot, dry summers | Pet-safe |
| Silveira's Portea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Silver Air Plant | Bright indirect light (just back from a sunny window) | Soak for 20–30 minutes twice a week; mist 2–3 times weekly | Pet-safe |
| Silver Ball Cactus | Bright indirect light (just back from a sunny window) | When the top of the mix is dry, roughly every 7-10 days in summer; none in winter | Pet-safe |
| Silver Ball Cactus | Direct sun (at least 4-6 hours) | When the top 3 cm of soil is dry, every 10-14 days in summer; every 4-6 weeks in autumn; once monthly or less in winter | Pet-safe |
| Silver Ball Notocactus | Direct sun (at least 4-6 hours) | Every 2–3 weeks in spring and summer; once a month or less in winter | Pet-safe |
| Silver Ball Notocactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, approximately every 10-14 days in summer; sparingly once every 4-6 weeks in winter | Pet-safe |
| Silver Cluster Cactus | Bright indirect light (just back from a sunny window) | When the soil is fully dry, about every 10-14 days in growth; withhold in winter | Pet-safe |
| Silver Cup Annual Mallow | Direct sun (at least 4-6 hours) | When the top 3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Silver Date Palm | Direct sun (at least 4-6 hours) | Every 7–14 days in summer; every 3–4 weeks in winter | Pet-safe |
| Silver Date Palm | Direct sun (at least 4-6 hours) | Water deeply every 10-14 days in dry periods; largely self-sufficient once established in the ground | Pet-safe |
| Silver Dollar Maidenhair Fern | Bright indirect light (just back from a sunny window) | Every 3–5 days; never allow the medium to dry out | Pet-safe |
| Silver Dragon Lilyturf | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-10 days | Pet-safe |
| Silver European Fan Palm | Direct sun (at least 4-6 hours) | Water every 14-21 days in dry periods; very drought-tolerant once established in the ground | Pet-safe |
| Silver Fir | Direct sun (at least 4-6 hours) | Weekly during establishment; rainfall-dependent once established | Pet-safe |
| Silver Goldfish Plant | Bright indirect light (just back from a sunny window) | Water when the top 2 cm of mix feels dry; approximately every 7 days in summer, every 10–14 days in winter | Pet-safe |
| Silver Knight heather | Direct sun (at least 4-6 hours) | Weekly during establishment; moderate watering once established | Pet-safe |
| Silver lace fern | Bright indirect light (just back from a sunny window) | Keep evenly moist — water as soon as the surface feels barely dry, often every 3-5 days | Pet-safe |
| Silver Mediterranean Fan Palm | Direct sun (at least 4-6 hours) | Moderate; allow top 3–5 cm to dry between waterings | Pet-safe |
| Silver Ribbon Fern | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is just drying, roughly every 4-6 days | Pet-safe |
| Silver Sage | Direct sun (at least 4-6 hours) | Fortnightly or when soil is dry | Pet-safe |
| Silver Sheen Flame Violet | Bright indirect light (just back from a sunny window) | Every 5–7 days when actively growing; reduce in cooler months | Pet-safe |
| silver spike grass | Direct sun (at least 4-6 hours) | Weekly in the first season; monthly deep watering once established | Pet-safe |
| Silver Staghorn Fern | Direct sun (at least 4-6 hours) | When the mount is thoroughly dry, soak every 10-21 days; allows longer dry periods than most staghorns | Pet-safe |
| Silver Star Bromeliad | Bright indirect light (just back from a sunny window) | Every 7–10 days | Pet-safe |
| Silver Torch Cactus | Direct sun (at least 4-6 hours) | When the soil is dry, about every 10-14 days in summer; keep dry in winter | Pet-safe |
| Silver Tree Fern | Bright indirect light (just back from a sunny window) | Keep consistently moist; water every 3-5 days in summer, reducing to every 7-10 days in cooler months | Pet-safe |
| Silver Vase Bromeliad | Bright indirect light (just back from a sunny window) | Keep the central cup filled with soft water; water potting medium only when it approaches dryness | Pet-safe |
| Silver Vase Plant | Bright indirect light (just back from a sunny window) | Keep the central vase filled; refresh every 7-10 days | Pet-safe |
| Silver-leaf Sinningia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; water very sparingly or not at all during dormancy | Pet-safe |
| Silverberry | Direct sun (at least 4-6 hours) | Low; drought-tolerant once established | Pet-safe |
| Silverleaf Peperomia | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Simon Bamboo | Direct sun (at least 4-6 hours) | 2–3 times per week in summer, once per week in winter | Pet-safe |
| Simulated Air Plant | Bright indirect light (just back from a sunny window) | Weekly soak of 20–30 minutes | Pet-safe |
| Single-flower Lipstick Plant | Bright indirect light (just back from a sunny window) | When top 2 cm of compost dry out | Pet-safe |
| Single-leaf Cape Primrose | Bright indirect light (just back from a sunny window) | every 7–10 days in the growing season, reduce to every 14–21 days in winter | Pet-safe |
| Sinningia 'Duchess of York' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days in growth | Pet-safe |
| Sinningia 'Empress' | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, keeping the mix evenly moist during active growth | Pet-safe |
| Sinningia 'Li'l Georgie' | Bright indirect light (just back from a sunny window) | When the top 1 cm of soil is dry, about every 4-7 days | Pet-safe |
| Sinningia 'Prudence Risley' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in active growth | Pet-safe |
| Sinningia concinna | Bright indirect light (just back from a sunny window) | Keep evenly lightly moist while in growth, watering when the surface just dries, roughly every 5-8 days | Pet-safe |
| Sinningia eumorpha | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in active growth | Pet-safe |
| Sinningia tubiflora | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in active growth | Pet-safe |
| sioux blue indian grass | Direct sun (at least 4-6 hours) | Regularly during first season; once established, water only during prolonged summer drought | Pet-safe |
| Sitka Spruce | Direct sun (at least 4-6 hours) | Regular — keep soil consistently moist; very high natural rainfall in native habitat | Pet-safe |
| Skinner's Barkeria | Bright indirect light (just back from a sunny window) | Abundantly every 4-7 days during summer growth; nearly dry rest from late autumn to early spring | Pet-safe |
| Skinner's Cattleya | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; reduce to every 10–14 days in winter | Pet-safe |
| Skinners Achimenes | Bright indirect light (just back from a sunny window) | Consistently moist throughout the growing season; dry during winter dormancy | Pet-safe |
| Sky Blue Aster | Direct sun (at least 4-6 hours) | Water to establish, then rarely; very drought-tolerant | Pet-safe |
| Sky Flower Vine | Direct sun (at least 4-6 hours) | When the top 3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Sky Plant | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly, or mist several times a week; more often in dry, warm rooms | Pet-safe |
| Sky Rocket Feather Top | Direct sun (at least 4-6 hours) | Weekly while establishing, then occasional deep watering in drought | Pet-safe |
| Skyracer Moor Grass | Direct sun (at least 4-6 hours) | Regular; maintain consistent moisture | Pet-safe |
| Slack's Sundew | Direct sun (at least 4-6 hours) | Tray-water continuously during active growth; allow tray to dry slightly during the mild winter rest (does not have a hard dormancy). | Pet-safe |
| Sleeping Beauty Cymbidium | Bright indirect light (just back from a sunny window) | Every 5–7 days during active growth; reduce to every 10–14 days in autumn–winter | Pet-safe |
| Slender Frailea | Bright indirect light (just back from a sunny window) | When the top 3 cm of soil is dry, roughly every 10-14 days in summer | Pet-safe |
| Slender Ginger Lily | Bright indirect light (just back from a sunny window) | Consistently moist in the growing season; reduce sharply in winter | Pet-safe |
| slender goldfish plant | Bright indirect light (just back from a sunny window) | When the top third of the soil dries out, roughly every 7–10 days in the growing season and every 14 days in winter. | Pet-safe |
| Slender Iceplant | Direct sun (at least 4-6 hours) | Sparingly; allow soil to dry completely between waterings | Pet-safe |
| slender lipstick plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in active growth; reduce in winter | Pet-safe |
| Slender-Leaved Sundew | Direct sun (at least 4-6 hours) | Keep substrate consistently moist via a shallow tray; refresh water every few days | Pet-safe |
| Slender-lined Living Stones | Direct sun (at least 4-6 hours) | Very infrequent — one or two waterings during the autumn growth window (September–November); completely dry for 7–8 months of the year | Pet-safe |
| Slender-stalked Billbergia | Bright indirect light (just back from a sunny window) | Every 7–14 days | Pet-safe |
| Slim-Flowered Portea | Bright indirect light (just back from a sunny window) | Keep the central cup filled with fresh water; water the soil when the top 3 cm is dry, roughly every 7-10 days | Pet-safe |
| Slipper Gastrochilus | Bright indirect light (just back from a sunny window) | Mount: daily misting; pot: every 3-4 days during growth, every 7-10 days in winter | Pet-safe |
| Small-Flowered Cranesbill | Bright indirect light (just back from a sunny window) | Low; water sparingly and only in drought | Pet-safe |
| Small-flowered Pickerelweed | Direct sun (at least 4-6 hours) | Continuously moist to submerged | Pet-safe |
| Small-Fruited Ptychosperma | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Small-leaf Lipstick Plant | Bright indirect light (just back from a sunny window) | When top 2–3 cm of compost dry out | Pet-safe |
| Small-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–5 weeks in winter | Pet-safe |
| Small-leaved Fuchsia | Bright indirect light (just back from a sunny window) | Every 5-7 days in the growing season; every 14-21 days in winter | Pet-safe |
| Small-Leaved Lipstick Vine | Bright indirect light (just back from a sunny window) | Water when the top 2 cm of mix has dried; roughly every 7–10 days in summer, every 12–14 days in winter | Pet-safe |
| Small's Beardtongue | Bright indirect light (just back from a sunny window) | Every 1–2 weeks; reduce in winter | Pet-safe |
| Smooth Beardtongue | Bright indirect light (just back from a sunny window) | Weekly to every 10 days; adapts to both drought and periodic wet | Pet-safe |
| Smooth Blue Aster | Direct sun (at least 4-6 hours) | Water weekly until established, then sparingly | Pet-safe |
| Smooth Cayenne Pineapple | Direct sun (at least 4-6 hours) | Water when the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Smooth Coneflower | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks once established | Pet-safe |
| Smooth Cordgrass | Direct sun (at least 4-6 hours) | Continuous tidal immersion — lower intertidal zone | Pet-safe |
| Smooth Oxeye | Direct sun (at least 4-6 hours) | Every 1-2 weeks | Pet-safe |
| Smooth Phlox | Bright indirect light (just back from a sunny window) | 2–3 times per week in summer; weekly when established | Pet-safe |
| Snake Cactus | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days in summer; every 3-4 weeks in winter | Pet-safe |
| Snake Orchid | Bright indirect light (just back from a sunny window) | Keep evenly moist, about every 4-6 days in growth, drier in winter | Pet-safe |
| Snake-Petal Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in active growth; every 3–4 weeks in winter | Pet-safe |
| Snapdragon | Direct sun (at least 4-6 hours) | Weekly watering | Pet-safe |
| Snapdragon 'Madame Butterfly' | Direct sun (at least 4-6 hours) | Keep evenly moist; water about twice a week, adjusting for heat, letting the top of the soil dry first | Pet-safe |
| Snapdragon 'Rocket' | Direct sun (at least 4-6 hours) | Keep evenly moist; water roughly twice a week, more in heat, letting the surface dry between | Pet-safe |
| Snapdragon Achimenes | Bright indirect light (just back from a sunny window) | Keep evenly moist during the growing season (spring–autumn); withhold entirely during winter dormancy | Pet-safe |
| Snapdragon vine | Bright indirect light (just back from a sunny window) | Water when the top 2–3 cm of soil dries out, roughly every 5–7 days | Pet-safe |
| Sneed's Pincushion | Direct sun (at least 4-6 hours) | When the potting mix is completely dry, roughly every 14-21 days in the growing season; almost none in winter | Pet-safe |
| Snow Banana | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil begins to dry, roughly every 5-7 days in summer | Pet-safe |
| Snow Crystals Sweet Alyssum | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil feels dry, roughly every 5-7 days in warm weather | Pet-safe |
| Snow-in-Summer | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; minimal in winter | Pet-safe |
| Snowball Pincushion | Direct sun (at least 4-6 hours) | When fully dry, about every 10-14 days in summer; keep dry through winter | Pet-safe |
| Snowcap Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 2-3 weeks in summer; keep dry in winter | Pet-safe |
| Snowy Wood Rush | Bright indirect light (just back from a sunny window) | Moderate; water every 7–10 days in dry periods, more frequently in summer heat | Pet-safe |
| Sobralia macrantha | Bright indirect light (just back from a sunny window) | Water generously in active growth, keeping evenly moist; ease off in winter | Pet-safe |
| Sobralia xantholeuca | Bright indirect light (just back from a sunny window) | Water freely in active growth to stay evenly moist; reduce in winter | Pet-safe |
| Social Air Plant | Bright indirect light (just back from a sunny window) | Soak twice weekly or mist daily | Pet-safe |
| Soft-leaf Dunce Cap | Bright indirect light (just back from a sunny window) | Approximately every 12–14 days in the growing season; very sparingly in winter dormancy | Pet-safe |
| Soft-stem Bulrush | Direct sun (at least 4-6 hours) | Permanently aquatic or waterlogged; plant at 0–60 cm (0–24 in) water depth | Pet-safe |
| Soidao Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in growth; reduce to every 3–4 weeks in cooler months | Pet-safe |
| Somali Aerangis | Bright indirect light (just back from a sunny window) | When roots appear silvery and the medium approaches dryness, roughly every 6-9 days | Pet-safe |
| Sonoran Palmetto | Direct sun (at least 4-6 hours) | When the top 5-6 cm of soil is dry, roughly every 14-21 days in summer | Pet-safe |
| Sooty Coelogyne | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; reduce to every 10–14 days in winter | Pet-safe |
| Sophronitis coccinea | Bright indirect light (just back from a sunny window) | Every 2-4 days; keep evenly moist year-round | Pet-safe |
| Sophy's Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in growth; container plants checked more often | Pet-safe |
| Southern Canna | Direct sun (at least 4-6 hours) | Keep consistently moist to wet; suitable for bog or marginal planting | Pet-safe |
| Southern Cattail | Direct sun (at least 4-6 hours) | Continuously moist to submerged | Pet-safe |
| Southern Heath | Direct sun (at least 4-6 hours) | Water regularly but allow the soil surface to dry slightly between waterings | Pet-safe |
| Southern Japanese Hemlock | Bright indirect light (just back from a sunny window) | Weekly during the growing season; reduced in winter | Pet-safe |
| Southern Magnolia | Direct sun (at least 4-6 hours) | Deeply once a week for the first two seasons; established trees need water only in drought | Pet-safe |
| Southern Magnolia 'Little Gem' | Direct sun (at least 4-6 hours) | Weekly deep watering while establishing, then every 1-2 weeks in dry weather | Pet-safe |
| Southern Maidenhair Fern | Bright indirect light (just back from a sunny window) | Frequent — keep soil consistently moist | Pet-safe |
| Souvenir de la Malmaison Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly while establishing; mature plants when the top 5 cm of soil is dry | Pet-safe |
| Spanish Draba | Direct sun (at least 4-6 hours) | Water sparingly; allow soil to dry between waterings | Pet-safe |
| Spanish Fir | Direct sun (at least 4-6 hours) | Every 1–2 weeks during establishment; minimal once mature | Pet-safe |
| Spanish heath | Direct sun (at least 4-6 hours) | Weekly during establishment; fortnightly in summer once established | Pet-safe |
| Spanish Houseleek | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; once a month in winter | Pet-safe |
| Spanish Moss | Bright indirect light (just back from a sunny window) | Mist 2-4 times a week, or soak 20-30 minutes weekly in dry conditions | Pet-safe |
| Spanish Stonecrop | Direct sun (at least 4-6 hours) | Low — drought-tolerant; water only in very dry spells | Pet-safe |
| Spathoglottis kimballiana | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix starts to dry, roughly every 3-5 days in warmth | Pet-safe |
| Spathoglottis plicata | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix begins to dry, roughly every 3-5 days in warmth | Pet-safe |
| Spatulate Dendrobium | Bright indirect light (just back from a sunny window) | Regularly through warm growth; reduced over a cool, brighter winter rest | Pet-safe |
| Spectacular Dendrobium | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth; reduce to once every 2-3 weeks during winter rest | Pet-safe |
| Spegazzini's Gymnocalycium | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, every 10-14 days in summer; every 4-6 weeks in winter | Pet-safe |
| Spider Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in growth; none in winter | Pet-safe |
| Spike Dunce Cap | Direct sun (at least 4-6 hours) | Every 2–4 weeks during the growing season; sparingly in winter (once a month or less) | Pet-safe |
| Spike heath | Direct sun (at least 4-6 hours) | Low to moderate — once established, water only during prolonged drought | Pet-safe |
| Spiked Kohleria | Bright indirect light (just back from a sunny window) | Every 7–10 days in growth; reduce in winter | Pet-safe |
| spiked sedge | Bright indirect light (just back from a sunny window) | Moderate; water weekly in dry spells once established | Pet-safe |
| Spiked speedwell | Direct sun (at least 4-6 hours) | Every 7–14 days; drought-tolerant once established | Pet-safe |
| Spiny Billbergia | Bright indirect light (just back from a sunny window) | Every 10–14 days | Pet-safe |
| Spiny Club Cactus | Direct sun (at least 4-6 hours) | When soil is dry, about every 10-14 days in summer; little to none in winter | Pet-safe |
| Spiny Fuchsia | Direct sun (at least 4-6 hours) | Infrequent — allow soil to dry between waterings | Pet-safe |
| Spiny Orostachys | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; almost none in winter dormancy | Pet-safe |
| Spiny Palm | Bright indirect light (just back from a sunny window) | Keep the top 2-3 cm consistently moist, roughly every 5-7 days | Pet-safe |
| Spiny Racinaea | Bright indirect light (just back from a sunny window) | Mist 3-5 times per week or soak in water for 20-30 minutes 1-2 times per week | Pet-safe |
| Spiny Ruschia | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 10-14 days in summer; once every 4-6 weeks in winter | Pet-safe |
| Spiny Tree Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-8 days | Pet-safe |
| Spinystar Cactus | Direct sun (at least 4-6 hours) | When the potting mix is completely dry, roughly every 10-14 days in summer; almost none from October to March | Pet-safe |
| Spiraea 'Shirobana' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days once established | Pet-safe |
| Spiral Corkscrew Plant | Bright indirect light (just back from a sunny window) | Keep the substrate permanently moist using the tray method with 1-2 cm of distilled water; never allow to dry out | Pet-safe |
| Splash Polka Dot Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce slightly in winter | Pet-safe |
| Splendid Fuchsia | Bright indirect light (just back from a sunny window) | Regular during growth; reduce in winter | Pet-safe |
| Split Rock | Direct sun (at least 4-6 hours) | Soak-and-dry, only when fully dry — roughly every 2-3 weeks in active growth; little to none in summer and winter | Pet-safe |
| Splitbeard Bluestem | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Spoon-leaved Aloinopsis | Direct sun (at least 4-6 hours) | Every 2–3 weeks from autumn through early spring; minimal or none June–August | Pet-safe |
| spotted episcia | Bright indirect light (just back from a sunny window) | Water when the soil surface begins to dry slightly — roughly every 5–7 days in warm conditions. | Pet-safe |
| Spotted Gasteria | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in growth | Pet-safe |
| Spotted Goldfish Plant | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry | Pet-safe |
| Spotted Gongora | Bright indirect light (just back from a sunny window) | Regularly year-round; allow medium to approach dryness between waterings | Pet-safe |
| Spotted Joe Pye Weed | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water weekly or more in dry spells | Pet-safe |
| Spotted Neoregelia | Bright indirect light (just back from a sunny window) | Keep the central cup filled; allow potting medium to dry slightly between waterings | Pet-safe |
| Spreading Achimenes | Bright indirect light (just back from a sunny window) | Evenly moist during the growing season; completely dry during winter rhizome dormancy | Pet-safe |
| Spreading Bellflower | Direct sun (at least 4-6 hours) | Low — water only during prolonged dry spells | Pet-safe |
| Spreading-Flower Guzmania | Bright indirect light (just back from a sunny window) | Top up cup every 5–10 days; water medium every 2 weeks | Pet-safe |
| Sprengel's Air Plant | Bright indirect light (just back from a sunny window) | Soak weekly; mist 2–3 times per week | Pet-safe |
| Spring Cinquefoil | Direct sun (at least 4-6 hours) | Rarely once established; drought-tolerant | Pet-safe |
| Spring Cinquefoil (Potentilla tabernaemontani) | Direct sun (at least 4-6 hours) | Rarely; drought-tolerant once established | Pet-safe |
| Spring Cream heather | Direct sun (at least 4-6 hours) | Weekly during establishment; less frequent once established | Pet-safe |
| Springwood White winter heath | Direct sun (at least 4-6 hours) | Weekly for new plantings; established plants tolerate dry spells with watering every 2–3 weeks | Pet-safe |
| Spurred Vanhouttea | Bright indirect light (just back from a sunny window) | Every 5–7 days; allow top 2 cm to dry slightly between waterings | Pet-safe |
| Square Leaf Hoya | Bright indirect light (just back from a sunny window) | When the top third of the mix dries out (roughly weekly in summer, every 2 weeks in winter) | Pet-safe |
| Squirrel's Foot Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Squirrel's Foot Fern | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of the potting medium feels dry, roughly every 7-10 days in summer | Pet-safe |
| Squirrel's Paw Fern | Bright indirect light (just back from a sunny window) | Every 5–8 days in the growing season, every 10–14 days in cooler months | Pet-safe |
| St Dabeoc's heath | Direct sun (at least 4-6 hours) | Moderate; water regularly to keep soil evenly moist, especially in the first year | Pet-safe |
| Staghorn fern | Bright indirect light (just back from a sunny window) | Soak the mount weekly in summer, every 2-3 weeks in winter | Pet-safe |
| Stamford's Epidendrum | Bright indirect light (just back from a sunny window) | Every 4–6 days in active growth; every 14–21 days in winter rest | Pet-safe |
| Stanhopea oculata | Bright indirect light (just back from a sunny window) | When the basket surface begins to dry, often every 2-4 days in growth | Pet-safe |
| Stanhopea tigrina | Bright indirect light (just back from a sunny window) | Every 2-4 days in warm active growth; weekly in cooler, shorter days | Pet-safe |
| Stanhopea wardii | Bright indirect light (just back from a sunny window) | When the basket surface starts to dry, roughly every 2-4 days in active growth | Pet-safe |
| Stapelia flavopurpurea | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in the growing season | Pet-safe |
| Stapelia grandiflora | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in spring and summer | Pet-safe |
| Stapelia hirsuta | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in spring and summer | Pet-safe |
| Stapelia leendertziae | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in the growing season | Pet-safe |
| Stapelia variegata | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in spring and summer | Pet-safe |
| Star Cactus | Direct sun (at least 4-6 hours) | Every 2-4 weeks in spring/summer; roughly monthly or less in winter | Pet-safe |
| Star Frailea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is completely dry, roughly every 10-14 days in summer | Pet-safe |
| Star Jasmine | Bright indirect light (just back from a sunny window) | Water regularly to establish; once mature, water during dry spells when the top few cm of soil dries | Pet-safe |
| Star Magnolia | Direct sun (at least 4-6 hours) | Keep moist while establishing; water deeply weekly in dry spells for the first few years | Pet-safe |
| Star Magnolia 'Royal Star' | Direct sun (at least 4-6 hours) | Weekly while young, then in dry periods | Pet-safe |
| Star of Bethlehem Orchid | Bright indirect light (just back from a sunny window) | When the bark approaches dryness, roughly every 4-7 days | Pet-safe |
| Star Window Plant | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in summer | Pet-safe |
| Stardust Dendrobium | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce to every 10–14 days in winter rest | Pet-safe |
| Stardust Ice Plant | Direct sun (at least 4-6 hours) | Every 1–2 weeks during active growth; very sparingly in winter | Pet-safe |
| Starflower pincushion | Direct sun (at least 4-6 hours) | Every 6–8 days during active growth | Pet-safe |
| Starina Miniature Rose | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 2-4 days in summer | Pet-safe |
| Statice | Direct sun (at least 4-6 hours) | Low to moderate — allow soil to dry between waterings | Pet-safe |
| Statice sea lavender | Direct sun (at least 4-6 hours) | Once weekly; allow the top 2–3 cm of soil to dry between waterings | Pet-safe |
| Steinmann's Rebutia | Direct sun (at least 4-6 hours) | Every 7–10 days in summer; every 14–21 days in spring and autumn; very little or none in winter | Pet-safe |
| Stenake's Wax Plant | Bright indirect light (just back from a sunny window) | Once or twice a week in summer; reduce in winter | Pet-safe |
| Stenocactus crispatus | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 10-14 days in growth; keep dry in winter | Pet-safe |
| Stephan's Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks from late August through November (active growth); withheld completely from May to late August | Pet-safe |
| Sterling Silver Linden | Direct sun (at least 4-6 hours) | Weekly during the first 2 years; monthly deep watering once established | Pet-safe |
| Stewartia monadelpha | Bright indirect light (just back from a sunny window) | Weekly; keep soil consistently moist but well-drained | Pet-safe |
| Stewartia pseudocamellia | Bright indirect light (just back from a sunny window) | Weekly; keep soil consistently moist but never waterlogged | Pet-safe |
| Sticky Vriesea | Bright indirect light (just back from a sunny window) | Keep the central tank at least one-quarter full; refresh every 7-10 days; water soil only when top 3 cm is dry | Pet-safe |
| Stiff Goldenrod | Direct sun (at least 4-6 hours) | Highly drought-tolerant; water only in prolonged drought | Pet-safe |
| Stiff Sunflower | Direct sun (at least 4-6 hours) | Every 2-3 weeks once established | Pet-safe |
| Stiff twinspur | Direct sun (at least 4-6 hours) | 2–3 times per week in active growth; once per week when established in cooler weather | Pet-safe |
| Stilt Palm | Bright indirect light (just back from a sunny window) | Keep consistently moist; water every 3-5 days in the growing season | Pet-safe |
| Stock | Direct sun (at least 4-6 hours) | Every 5–7 days; keep evenly moist but not wet | Pet-safe |
| Stomandra Cape Primrose | Bright indirect light (just back from a sunny window) | Every 7–10 days; keep compost lightly and evenly moist | Pet-safe |
| Stone Gate Palm | Direct sun (at least 4-6 hours) | Weekly in summer, fortnightly in winter | Pet-safe |
| Stonecrop 'Autumn Joy' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is fully dry, roughly every 10-14 days; less frequent once established | Pet-safe |
| Stonecrop 'Dragon's Blood' | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is completely dry, roughly every 10-14 days; minimal once established | Pet-safe |
| Stonecrop Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; once a month or less in winter | Pet-safe |
| Stonecrop-leaf Aichryson | Bright indirect light (just back from a sunny window) | Every 10–14 days in the active growing season (autumn to spring); once a month or less in summer | Pet-safe |
| straight-leaved butterwort | Bright indirect light (just back from a sunny window) | Water when top of mix feels barely dry (summer); reduce to very occasional misting (winter) | Pet-safe |
| Straw-red Sage | Direct sun (at least 4-6 hours) | Every 10–14 days once established; weekly for new plants | Pet-safe |
| Strawberry Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer; once a month or less in winter | Pet-safe |
| Strawberry Fields gomphrena | Direct sun (at least 4-6 hours) | Weekly; drought-tolerant once established | Pet-safe |
| Strawberry globe amaranth | Direct sun (at least 4-6 hours) | Every 7–14 days once established; moderate during establishment | Pet-safe |
| Streptocarpus 'Bethan' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Streptocarpus 'Black Panther' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Streptocarpus 'Chorus Line' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Streptocarpus 'Falling Stars' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Streptocarpus 'Harlequin Blue' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-10 days | Pet-safe |
| Streptocarpus 'Polka-Dot Purple' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Streptocarpus 'Purple Haze' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil feels dry, about every 7-10 days | Pet-safe |
| Streptocarpus 'Targa' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, around every 7-10 days | Pet-safe |
| Streptocarpus caulescens | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-12 days | Pet-safe |
| Streptocarpus saxorum | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-12 days | Pet-safe |
| Strict Hygrophila | Bright indirect light (just back from a sunny window) | Fully submerged aquatic plant; keep in aquarium water at all times | Pet-safe |
| Stricta Feather Reed Grass | Direct sun (at least 4-6 hours) | Consistently moist; tolerates standing water in spring | Pet-safe |
| String Bean Hoya | Bright indirect light (just back from a sunny window) | When the soil is almost fully dry, roughly every 10-14 days | Pet-safe |
| String of hearts | Bright indirect light (just back from a sunny window) | When soil is dry, every 10-14 days | Pet-safe |
| String of Hearts 'Silver Glory' | Bright indirect light (just back from a sunny window) | When the top half of the soil is fully dry, roughly every 10-14 days in growth | Pet-safe |
| String of Spades | Bright indirect light (just back from a sunny window) | When the soil is nearly dry, roughly every 10-14 days | Pet-safe |
| String of Turtles | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in summer and far less in winter | Pet-safe |
| String of Turtles | Bright indirect light (just back from a sunny window) | Every 7–10 days in summer; every 10–14 days in winter | Pet-safe |
| Stripe It Rich Hakone Grass | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Striped Goldfish Plant | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry | Pet-safe |
| stromanthe | Bright indirect light (just back from a sunny window) | Every 5–7 days in growing season; every 10–14 days in winter | Pet-safe |
| Stromanthe 'Multicolor' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 5-7 days in growth | Pet-safe |
| Stromanthe Jacquinii | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Stromanthe Magic Star | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days, keeping it lightly moist | Pet-safe |
| Stromanthe Sanguinea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Stromanthe Sanguinea Magicstar | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Stromanthe Sanguinea Multicolor | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Stromanthe Triostar | Bright indirect light (just back from a sunny window) | When the top 2-3cm of compost feels dry, roughly weekly in growth | Pet-safe |
| Stromanthe Triostar (Tricolor) | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 5-7 days in growth | Pet-safe |
| Subalpine Fir | Direct sun (at least 4-6 hours) | Regular watering during establishment; naturally sustained by snowmelt and high-altitude precipitation | Pet-safe |
| Subalpine Larch | Direct sun (at least 4-6 hours) | Moderate; supplemental irrigation during dry summers | Pet-safe |
| Sugar Palm | Bright indirect light (just back from a sunny window) | When the top 4-6 cm of soil is dry, roughly every 7-10 days in summer; every 14-21 days in winter | Pet-safe |
| Sugarloaf Pineapple | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Sulawesi Wax Plant | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Sulcorebutia rauschii | Direct sun (at least 4-6 hours) | When fully dry in summer, roughly every 12-14 days; keep dry in winter | Pet-safe |
| Sulcorebutia steinbachii | Direct sun (at least 4-6 hours) | When fully dry in summer, roughly every 10-14 days; none in winter | Pet-safe |
| Sulphur Clover | Bright indirect light (just back from a sunny window) | Low to moderate; drought-tolerant once established | Pet-safe |
| Sulphur Cosmos | Direct sun (at least 4-6 hours) | Water until established, then only in extended drought; highly drought-tolerant | Pet-safe |
| Sumatra Banana | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 5-7 days in warm months | Pet-safe |
| Summer Hyacinth | Direct sun (at least 4-6 hours) | Regular during spring and summer; reduce in autumn and winter | Pet-safe |
| Summit Sage | Bright indirect light (just back from a sunny window) | Every 10–14 days | Pet-safe |
| Sun Crown Cactus | Direct sun (at least 4-6 hours) | Every 10-14 days in the growing season; nearly dry in winter | Pet-safe |
| Sun Cup Cactus | Direct sun (at least 4-6 hours) | Every 2–3 weeks in spring and summer; monthly or less in autumn and winter | Pet-safe |
| Sun Flare Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly | Pet-safe |
| Sun Pitcher Plant | Bright indirect light (just back from a sunny window) | Keep pitchers partially filled with distilled water; water substrate when surface begins to dry, roughly every 3-5 days in warm conditions | Pet-safe |
| Sunblaze Miniature Rose | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, about every 2-4 days in summer | Pet-safe |
| Sunflower | Direct sun (at least 4-6 hours) | Deep watering once a week | Pet-safe |
| Sunningdale Silver Pampas Grass | Direct sun (at least 4-6 hours) | Weekly while establishing; thereafter only in extended drought | Pet-safe |
| Sunrise Crown Cactus | Direct sun (at least 4-6 hours) | When fully dry, roughly every 12-16 days in growth; none in winter | Pet-safe |
| Sunsatia Mango Nemesia | Direct sun (at least 4-6 hours) | When the top 2-3 cm of compost is dry, roughly every 4-6 days | Pet-safe |
| Sunsatia Plus Coconut Nemesia | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil or compost is dry, roughly every 4-6 days | Pet-safe |
| Sunset Hyssop | Direct sun (at least 4-6 hours) | Every 7–10 days once established | Pet-safe |
| Super Kabuto Star Cactus | Direct sun (at least 4-6 hours) | When the soil is fully dry, about every 10-14 days in growth; none in winter | Pet-safe |
| Super King Ixora Red | Direct sun (at least 4-6 hours) | Every 5–7 days; maintain consistent moisture without waterlogging | Pet-safe |
| Superb Wittrockia | Bright indirect light (just back from a sunny window) | Keep the central tank filled; water the root zone when the top 3 cm is dry, roughly every 7-10 days | Pet-safe |
| Supertunia 'Vista Bubblegum' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry; daily in hot weather and containers | Pet-safe |
| Supertunia bubblegum petunia | Direct sun (at least 4-6 hours) | Every 2–4 days in containers in heat; every 5–7 days in borders | Pet-safe |
| Sutherland's Ice Plant | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is completely dry, roughly every 7-14 days in growing season; reduce to monthly in winter | Pet-safe |
| Swamp Rose Mallow | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water every 3-5 days in summer or more frequently in containers | Pet-safe |
| Swamp Sunflower | Direct sun (at least 4-6 hours) | Consistently moist; water weekly or more in dry periods | Pet-safe |
| Swan Orchid | Bright indirect light (just back from a sunny window) | Water freely every 3-5 days during active growth; stop almost entirely (water monthly at most) once leaves drop and rest begins | Pet-safe |
| Swedish Ivy | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost feels dry, roughly weekly in summer | Pet-safe |
| Sweet alyssum | Bright indirect light (just back from a sunny window) | Every 5–7 days; drought-tolerant once established | Pet-safe |
| Sweet Birch | Direct sun (at least 4-6 hours) | Moderate; water deeply during drought; established trees on suitable sites are largely self-sufficient | Pet-safe |
| Sweet Black-Eyed Susan | Direct sun (at least 4-6 hours) | Weekly in the first growing season; every 10–14 days when established | Pet-safe |
| Sweet Chariot Miniature Rose | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, often every 1-3 days in baskets during summer | Pet-safe |
| Sweet Pitcher Plant | Direct sun (at least 4-6 hours) | Tray method: keep 1-3 cm of distilled or rainwater in the saucer continuously during the growing season; reduce to slightly moist in winter | Pet-safe |
| Sweet sultan | Direct sun (at least 4-6 hours) | Every 7–10 days | Pet-safe |
| Sweetbay Magnolia | Direct sun (at least 4-6 hours) | Keep soil consistently moist; weekly deep watering when young and during dry spells | Pet-safe |
| Sweetbriar Rose | Direct sun (at least 4-6 hours) | Weekly while establishing, then minimal | Pet-safe |
| Sweetheart plant | Bright indirect light (just back from a sunny window) | When soil is dry, every 14-21 days | Pet-safe |
| Swiss Rock Jasmine | Direct sun (at least 4-6 hours) | Very sparingly year-round; almost dry in winter | Pet-safe |
| Sword Brake Fern | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of mix is dry, about every 4-6 days | Pet-safe |
| Sword-Leaved Air Plant | Bright indirect light (just back from a sunny window) | Mist 2-3 times per week or soak 20 minutes weekly | Pet-safe |
| Sword-Leaved Phlox | Direct sun (at least 4-6 hours) | Weekly until established; monthly or less once established in well-drained soil | Pet-safe |
| Swordleaf Rush | Direct sun (at least 4-6 hours) | Consistently moist to wet soil; tolerates shallow standing water to 5 cm (2 in) | Pet-safe |
| Syagrus Romanzoffiana | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 5-10 days in heat | Pet-safe |
| Sylvester Date Palm | Direct sun (at least 4-6 hours) | Deeply every 7-14 days while establishing, then drought-tolerant | Pet-safe |
| Symphyotrichum laeve 'Bluebird' | Direct sun (at least 4-6 hours) | Water to establish, then only in prolonged dry spells once settled | Pet-safe |
| Symphyotrichum novae-angliae 'Andenken an Alma Pötschke' | Direct sun (at least 4-6 hours) | Keep soil consistently moist; water deeply in dry spells, roughly weekly | Pet-safe |
| Symphyotrichum novi-belgii 'Fellowship' | Direct sun (at least 4-6 hours) | Keep soil reliably moist; water deeply, around weekly, never letting roots dry | Pet-safe |
| Symphyotrichum oblongifolium 'Raydon's Favorite' | Direct sun (at least 4-6 hours) | Weekly during the first season; once established, only in prolonged drought | Pet-safe |
| Table Fern | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is just barely dry, roughly every 4-7 days | Pet-safe |
| Tagetes erecta 'Inca Gold' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-4 days | Pet-safe |
| Tagetes erecta 'Taishan Orange' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-4 days | Pet-safe |
| Tagetes patula 'Boy Orange' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-5 days | Pet-safe |
| Tagetes patula 'Janie Bright Yellow' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 3-5 days | Pet-safe |
| Tagetes tenuifolia 'Tangerine Gem' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Tail-leaf Tolumnia | Bright indirect light (just back from a sunny window) | When roots appear silvery and the leaf base is dry, roughly every 5-7 days | Pet-safe |
| Tailed Aechmea | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (soil); refresh central tank monthly | Pet-safe |
| Tailed Masdevallia | Bright indirect light (just back from a sunny window) | Daily in warm weather; every 3–5 days in cooler months | Pet-safe |
| Taita African violet | Bright indirect light (just back from a sunny window) | Every 7–10 days | Pet-safe |
| Taiwan Felt Fern | Bright indirect light (just back from a sunny window) | Every 7-10 days; allow surface to dry between waterings | Pet-safe |
| Tall Bluebells | Bright indirect light (just back from a sunny window) | Water deeply 2–3 times weekly; never allow to dry out in growing season | Pet-safe |
| Tall Coreopsis | Direct sun (at least 4-6 hours) | Low once established; water weekly during the first growing season | Pet-safe |
| Tall Goldenrod | Direct sun (at least 4-6 hours) | Drought-tolerant once established; water only in extended dry spells | Pet-safe |
| Tall Mix pincushion flower | Direct sun (at least 4-6 hours) | Once or twice weekly | Pet-safe |
| Tall Moor Grass | Bright indirect light (just back from a sunny window) | Regular; keep soil evenly moist | Pet-safe |
| tall purple moor grass | Bright indirect light (just back from a sunny window) | Regularly during establishment; once established, water only in prolonged dry spells | Pet-safe |
| Tall Sinningia | Bright indirect light (just back from a sunny window) | When top 2–3 cm of compost feels dry during growth | Pet-safe |
| Tamarack | Direct sun (at least 4-6 hours) | Regular; tolerates seasonally wet or boggy conditions | Pet-safe |
| Tamis Chirita | Bright indirect light (just back from a sunny window) | Every 7–10 days | Pet-safe |
| Tar-scented Vriesea | Bright indirect light (just back from a sunny window) | Refill central cup weekly; allow potting medium to remain almost completely dry | Pet-safe |
| Taraw Palm | Direct sun (at least 4-6 hours) | Regularly during establishment; moderately once mature | Pet-safe |
| Tasmanian Tree Fern | Bright indirect light (just back from a sunny window) | Keep consistently moist — water when the top 3-4 cm of soil or fibrous trunk surface feels dry, typically every 3-7 days | Pet-safe |
| Tasteless Stonecrop | Bright indirect light (just back from a sunny window) | Every 14-21 days in spring and summer; monthly or less in winter | Pet-safe |
| Tatei Sun Pitcher | Bright indirect light (just back from a sunny window) | Keep pitchers partially filled with distilled water; moisten the substrate every 3-5 days, ensuring it remains consistently damp without waterlogging | Pet-safe |
| Tawny Living Stones | Direct sun (at least 4-6 hours) | Seasonally — water sparingly in autumn (September–November) during active growth; keep completely dry in winter and summer | Pet-safe |
| Teasing Georgia Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the growing season; more in heat | Pet-safe |
| Teddy Bear Palm | Direct sun (at least 4-6 hours) | Every 3–5 days when established in ground; check containers daily in summer | Pet-safe |
| Teddy Bear Palm | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil dries out, roughly every 7-14 days depending on conditions | Pet-safe |
| Teddy Bear sunflower | Direct sun (at least 4-6 hours) | Weekly, or every 5–7 days during dry spells | Pet-safe |
| Teddy Bear Vine | Bright indirect light (just back from a sunny window) | When the top 2–3 cm of soil feel dry, roughly every 7–10 days year-round | Pet-safe |
| Tennessee Coneflower | Direct sun (at least 4-6 hours) | Water to establish, then only during extended drought | Pet-safe |
| Tessellated Vanda | Direct sun (at least 4-6 hours) | Daily in heat; every 2-3 days in cool, low-light spells | Pet-safe |
| Texas Barrel Cactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in summer and once every 4-6 weeks in winter | Pet-safe |
| Texas Blazing Star | Direct sun (at least 4-6 hours) | Every 2–3 weeks during establishment; minimal once established | Pet-safe |
| Texas Nipple Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-14 days in summer and once every 4-6 weeks in winter | Pet-safe |
| Texas Rainbow Cactus | Direct sun (at least 4-6 hours) | Every 2–3 weeks in summer; once a month or less in winter | Pet-safe |
| Texas Sage | Direct sun (at least 4-6 hours) | Moderate — water once or twice weekly in the growing season | Pet-safe |
| Thai Mountain Palm | Bright indirect light (just back from a sunny window) | Every 5–7 days in summer, fortnightly in cooler months | Pet-safe |
| Thanksgiving Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days | Pet-safe |
| The Blues Little Bluestem | Direct sun (at least 4-6 hours) | Every 2–3 weeks during the first growing season; minimal once established | Pet-safe |
| The Blues Little Bluestem | Direct sun (at least 4-6 hours) | Weekly for first season; every 3–4 weeks or rain-fed once established | Pet-safe |
| The Bride pearlbush | Direct sun (at least 4-6 hours) | Weekly during establishment; once established, every 2–3 weeks or during dry spells | Pet-safe |
| The Dark Lady Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly through the growing season, more in heat | Pet-safe |
| The Fairy Rose | Direct sun (at least 4-6 hours) | Deeply once a week in the growing season, more during heatwaves | Pet-safe |
| The Generous Gardener Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in growth; more during establishment and in heat | Pet-safe |
| The Pilgrim Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in growth; more in heat | Pet-safe |
| Thelocactus bicolor | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 12-16 days in summer; none in winter | Pet-safe |
| Thelocactus hexaedrophorus | Direct sun (at least 4-6 hours) | When the mix is fully dry, roughly every 12-16 days in summer; none in winter | Pet-safe |
| Thelocactus setispinus | Direct sun (at least 4-6 hours) | When the top of the mix dries, roughly every 7-12 days in growth; keep dry in winter | Pet-safe |
| Theresa's Pincushion | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer and once every 6-8 weeks in winter | Pet-safe |
| Therese Bugnet Rose | Direct sun (at least 4-6 hours) | Weekly while establishing; drought-tolerant thereafter | Pet-safe |
| Thick Gongora | Bright indirect light (just back from a sunny window) | Every 4–6 days in active growth; every 10–14 days in winter rest | Pet-safe |
| Thick-leaf Goldfish Plant | Bright indirect light (just back from a sunny window) | When the top 2–3 cm of soil is dry | Pet-safe |
| Thimble Cactus | Direct sun (at least 4-6 hours) | When fully dry, roughly every 10-14 days in summer; keep nearly dry in winter | Pet-safe |
| Thin-Leaved Air Plant | Bright indirect light (just back from a sunny window) | 2–3 times per week | Pet-safe |
| Thin-Spiked Air Plant | Bright indirect light (just back from a sunny window) | 2–3 times per week (misting) or weekly soak | Pet-safe |
| Thistle Sage | Direct sun (at least 4-6 hours) | Very infrequent — once established, monthly or less in summer | Pet-safe |
| Thomsonii Wax Plant | Bright indirect light (just back from a sunny window) | When the top 2-3 cm (about the top 60-80%) of the mix is dry, roughly weekly in spring/summer and less in winter | Pet-safe |
| Thorny Bamboo | Direct sun (at least 4-6 hours) | 2-3 times per week during establishment and growing season; drought-tolerant once established | Pet-safe |
| Thorny Chin Cactus | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in summer; every 5–8 weeks in winter | Pet-safe |
| Thoroughwax | Direct sun (at least 4-6 hours) | Every 5–7 days; allow top inch to partially dry between waterings | Pet-safe |
| Thread-Leaf Air Plant | Bright indirect light (just back from a sunny window) | Mist 3–4 times a week or soak once a week | Pet-safe |
| Thread-Leaved Air Plant | Bright indirect light (just back from a sunny window) | Mist 2–3 times per week, or soak for 20–30 minutes once a week | Pet-safe |
| Threadleaf Coreopsis | Direct sun (at least 4-6 hours) | Low; drought-tolerant once established | Pet-safe |
| Threadleaf Tickseed 'Moonbeam' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 7-10 days; infrequent once established | Pet-safe |
| Three-Colored Lycaste | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; reduce to every 10–14 days in winter | Pet-safe |
| Three-Coloured Vanda | Direct sun (at least 4-6 hours) | Daily in warm growth; every 2-3 days when cool and dim | Pet-safe |
| Three-Nerved Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days (allow soil to dry between waterings) | Pet-safe |
| Thrift | Direct sun (at least 4-6 hours) | Every 7–14 days, allowing soil to dry between waterings | Pet-safe |
| Throatwort | Direct sun (at least 4-6 hours) | Every 4–6 days; water when the top 2 cm of soil begins to dry | Pet-safe |
| Thunberg Spirea | Direct sun (at least 4-6 hours) | Weekly until established; occasional deep watering thereafter | Pet-safe |
| Tidal Wave silver petunia | Direct sun (at least 4-6 hours) | Every 3–5 days in containers; every 7–10 days in garden beds | Pet-safe |
| Tiger Crow Orchid | Bright indirect light (just back from a sunny window) | When the bark mix is nearly dry, roughly every 5-7 days in growth | Pet-safe |
| Tiger Fern | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, often every 4-7 days | Pet-safe |
| Tiger Moth Orchid | Bright indirect light (just back from a sunny window) | When the bark is nearly dry, typically every 6-9 days | Pet-safe |
| Tiger Trichocentrum | Bright indirect light (just back from a sunny window) | When the bark approaches dryness, every 7-10 days; reduce slightly in cooler months | Pet-safe |
| Tilia cordata | Direct sun (at least 4-6 hours) | Water young trees deeply every 7-14 days in dry spells for the first two seasons; established trees are largely self-sufficient | Pet-safe |
| Tilia tomentosa 'Petiolaris' | Direct sun (at least 4-6 hours) | Deep watering every 7-14 days during dry weather for the first two or three seasons; established trees seldom need it | Pet-safe |
| Tillandsia aeranthos | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly | Pet-safe |
| Tillandsia Andreana | Bright indirect light (just back from a sunny window) | Mist 2-3 times a week and soak 20-30 minutes every 1-2 weeks, more often in dry heat | Pet-safe |
| Tillandsia Baileyi | Bright indirect light (just back from a sunny window) | Soak for 20-30 minutes weekly, with extra misting in dry or hot spells | Pet-safe |
| Tillandsia bergeri | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly; mist between soaks in dry air | Pet-safe |
| Tillandsia brachycaulos | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly | Pet-safe |
| Tillandsia bulbosa | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly, plus misting between soaks in dry air | Pet-safe |
| Tillandsia butzii | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly; mist between soaks if dry | Pet-safe |
| Tillandsia Capitata | Bright indirect light (just back from a sunny window) | Soak fully every 7-10 days, plus mist 2-3 times weekly in dry or warm conditions | Pet-safe |
| Tillandsia caput-medusae | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes every 1-2 weeks; mist between soaks | Pet-safe |
| Tillandsia Concolor | Bright indirect light (just back from a sunny window) | Soak fully every 7-10 days, plus mist 1-2 times weekly in dry air | Pet-safe |
| Tillandsia fasciculata | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly | Pet-safe |
| Tillandsia fuchsii | Bright indirect light (just back from a sunny window) | Mist 2-3 times weekly or soak 20-30 minutes weekly | Pet-safe |
| Tillandsia funckiana | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly, or mist 2-3 times a week | Pet-safe |
| Tillandsia Gardneri | Bright indirect light (just back from a sunny window) | Mist thoroughly 3-4 times a week; brief 10-15 minute soaks every 1-2 weeks | Pet-safe |
| Tillandsia ionantha 'Druid' | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly, with misting between soaks in dry rooms | Pet-safe |
| Tillandsia ionantha 'Fuego' | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly, plus misting between soaks in dry rooms | Pet-safe |
| Tillandsia juncea | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly | Pet-safe |
| Tillandsia leiboldiana | Bright indirect light (just back from a sunny window) | Keep the central cup filled; soak or rinse weekly | Pet-safe |
| Tillandsia magnusiana | Bright indirect light (just back from a sunny window) | Mist 2-3 times a week, or briefly dunk every 1-2 weeks | Pet-safe |
| Tillandsia paleacea | Bright indirect light (just back from a sunny window) | Mist 2-3 times a week, or soak briefly every 1-2 weeks | Pet-safe |
| Tillandsia polystachia | Bright indirect light (just back from a sunny window) | Soak or mist 2-3 times weekly, more in heat | Pet-safe |
| Tillandsia Pruinosa | Bright indirect light (just back from a sunny window) | Mist or dunk 2-4 times weekly; soak briefly every 1-2 weeks | Pet-safe |
| Tillandsia pseudobaileyi | Bright indirect light (just back from a sunny window) | Soak or dunk every 7-10 days | Pet-safe |
| Tillandsia recurvifolia | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly; mist between soaks if air is dry | Pet-safe |
| Tillandsia schiedeana | Bright indirect light (just back from a sunny window) | Soak or dunk every 7-10 days, or mist 2-3 times weekly | Pet-safe |
| Tillandsia Seleriana | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes every 1-2 weeks; mist only lightly between soaks | Pet-safe |
| Tillandsia Streptophylla | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes every 1-2 weeks; mist sparingly between soaks | Pet-safe |
| Tillandsia stricta | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly, plus misting between soaks in dry rooms | Pet-safe |
| Tillandsia tectorum | Bright indirect light (just back from a sunny window) | Mist lightly every 10-14 days; soak only rarely | Pet-safe |
| Tillandsia tricolor | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes once a week, or mist 2-3 times weekly | Pet-safe |
| Tillandsia Velutina | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly, misting more often in warm, dry conditions | Pet-safe |
| Tillandsia xerographica | Bright indirect light (just back from a sunny window) | Soak for 20-30 minutes every 10-14 days, more often in dry heat | Pet-safe |
| Tina butterwort | Bright indirect light (just back from a sunny window) | Keep media lightly damp during carnivorous phase; allow to nearly dry during succulent winter phase | Pet-safe |
| Tiny Dunce Cap | Direct sun (at least 4-6 hours) | Every 1–2 weeks during active growth; very sparingly in winter dormancy | Pet-safe |
| Tiny Sea Lavender | Direct sun (at least 4-6 hours) | Low — water sparingly, allowing soil to dry completely between sessions | Pet-safe |
| Tiny Sun Mammillaria | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 10-14 days in summer and once every 6 weeks in winter | Pet-safe |
| Tiny-calyx Columnea | Bright indirect light (just back from a sunny window) | Every 5–7 days in summer; every 10–14 days in winter | Pet-safe |
| Tiramisu Heuchera | Bright indirect light (just back from a sunny window) | Keep soil evenly moist; water when the top 2-3 cm is dry, roughly every 5-7 days in summer | Pet-safe |
| Tiraque Sulcorebutia | Direct sun (at least 4-6 hours) | Every 10-14 days in active growth; once a month or less from October to February | Pet-safe |
| Toe toe | Direct sun (at least 4-6 hours) | Once or twice a week during establishment; monthly once established | Pet-safe |
| Tolumnia variegata | Bright indirect light (just back from a sunny window) | Daily to every other day when mounted; allow to dry fully between | Pet-safe |
| Tom Thumb Cactus | Direct sun (at least 4-6 hours) | When the top of the soil is dry, about every 7-10 days in summer; minimal in winter | Pet-safe |
| Tompa Norway Spruce | Direct sun (at least 4-6 hours) | Every 7-10 days when establishing; deep watering as the top few cm of soil dry | Pet-safe |
| Toothed Davallia | Bright indirect light (just back from a sunny window) | Every 4–6 days in summer, every 8–12 days in winter | Pet-safe |
| Toothed Fly Bush | Direct sun (at least 4-6 hours) | Keep substrate evenly moist; water every 2–4 days with pure water only | Pet-safe |
| Toothed Fuchsia | Bright indirect light (just back from a sunny window) | Regular — keep evenly moist | Pet-safe |
| Top-shaped Living Stones | Direct sun (at least 4-6 hours) | Every 3–4 weeks in autumn; none in summer or winter | Pet-safe |
| Topeka Purple Coneflower | Direct sun (at least 4-6 hours) | Weekly during establishment; rainfall-dependent once mature (every 3–4 weeks in dry spells) | Pet-safe |
| Topsy Turvy Echeveria | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in summer | Pet-safe |
| Tormentil | Bright indirect light (just back from a sunny window) | Moderate; keep soil lightly moist but not wet | Pet-safe |
| Touch of Class Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly during growth | Pet-safe |
| Trachelospermum asiaticum | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days while establishing | Pet-safe |
| Trachelospermum jasminoides 'Variegatum' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 5-10 days in growth | Pet-safe |
| Trachycarpus Latisectus | Bright indirect light (just back from a sunny window) | Regularly through the growing season; keep evenly moist but never soggy | Pet-safe |
| Trachycarpus Takil | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in summer; reduce sharply over winter | Pet-safe |
| Trailing Achimenes | Bright indirect light (just back from a sunny window) | Consistently moist but never waterlogged during the growing season; completely dry in winter dormancy | Pet-safe |
| Trailing African daisy | Direct sun (at least 4-6 hours) | Once or twice a week during active growth; reduce to once a week or less once established | Pet-safe |
| Trailing African Violet | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Trailing African Violet 'Rob's Vanilla Trail' | Bright indirect light (just back from a sunny window) | When the soil surface is just dry, about every 5-7 days | Pet-safe |
| Trailing Cape Primrose | Bright indirect light (just back from a sunny window) | every 7–10 days in active growth, every 14–21 days in winter | Pet-safe |
| trailing clog plant | Bright indirect light (just back from a sunny window) | Every 7–10 days in spring–summer, every 12–14 days in autumn–winter | Pet-safe |
| Trailing Elephant Bush | Bright indirect light (just back from a sunny window) | Every 7–10 days in summer; every 2–3 weeks in winter | Pet-safe |
| Trailing Fuchsia | Bright indirect light (just back from a sunny window) | Every 7-10 days in summer; very sparingly in winter | Pet-safe |
| Trailing globe amaranth | Direct sun (at least 4-6 hours) | Every 5–7 days; quite drought-tolerant | Pet-safe |
| Trailing Ice Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks (allow soil to dry completely between waterings) | Pet-safe |
| Trailing Iceplant Vygie | Direct sun (at least 4-6 hours) | When the top 3 cm of soil is fully dry, roughly every 7-10 days in spring-summer; monthly or less in winter | Pet-safe |
| Trailing Jade Peperomia | Bright indirect light (just back from a sunny window) | Every 7-14 days in spring/summer; less in winter | Pet-safe |
| Trailing Maidenhair Fern | Bright indirect light (just back from a sunny window) | When the surface just begins to dry, roughly every 3-5 days | Pet-safe |
| Transparent Moor Grass | Direct sun (at least 4-6 hours) | Every 7-14 days; keep moderately moist | Pet-safe |
| Transparent Tall Moor Grass | Bright indirect light (just back from a sunny window) | Weekly during establishment; less once settled | Pet-safe |
| Transparent-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (allow compost to dry between waterings) | Pet-safe |
| Traveller's Palm | Direct sun (at least 4-6 hours) | Consistently moist during spring and summer; reduced in winter | Pet-safe |
| Tree Fuchsia | Bright indirect light (just back from a sunny window) | Every 5-7 days in summer, reducing to every 14 days in winter | Pet-safe |
| Tree heath | Direct sun (at least 4-6 hours) | Fortnightly during the first growing season; drought-tolerant once established | Pet-safe |
| Tree-Like Pilosocereus | Direct sun (at least 4-6 hours) | When soil is dry to mid-depth, roughly every 10-14 days in summer; monthly in winter | Pet-safe |
| Trembling Brake Fern | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil feels dry, roughly every 5-7 days in summer | Pet-safe |
| Tremula Pteris Fern | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of mix is dry, roughly every 4-6 days | Pet-safe |
| Triangle palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Triangle Staghorn Fern | Bright indirect light (just back from a sunny window) | When the mount or shield fronds feel dry, soak every 7-14 days in summer | Pet-safe |
| Triangular Rhipsalis | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is dry, roughly every 7-10 days in growth | Pet-safe |
| Tricolor Bladderwort | Bright indirect light (just back from a sunny window) | Keep substrate saturated or in a shallow tray of 1–3 cm of water at all times | Pet-safe |
| Tropaeolum majus 'Jewel of Africa' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 4-7 days; containers more often in heat | Pet-safe |
| Tropical Dewy Pine | Direct sun (at least 4-6 hours) | Keep medium wet to moist at all times; tray method with 1–2 cm water | Pet-safe |
| Tropical pitcher plant | Bright indirect light (just back from a sunny window) | Keep the compost damp at all times, never bone-dry; in practice water with pure water every 2-4 days depending on warmth | Pet-safe |
| Tropical Pitcher Plant | Bright indirect light (just back from a sunny window) | Keep media constantly moist; water every 2-4 days with mineral-free water | Pet-safe |
| Tropical Pitcher Plant 'Ventrata' | Bright indirect light (just back from a sunny window) | Keep mix evenly moist; water every few days, not standing in a deep tray | Pet-safe |
| Tropical Sundew | Bright indirect light (just back from a sunny window) | Keep tray permanently wet | Pet-safe |
| Trumpeter Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly | Pet-safe |
| Truncate Haworthia | Bright indirect light (just back from a sunny window) | When soil is fully dry, about every 10-14 days in active growth, minimal in winter | Pet-safe |
| Truncated Gongora | Bright indirect light (just back from a sunny window) | Abundantly during growth; reduced but never dry in winter | Pet-safe |
| Tsuboii Bamboo | Bright indirect light (just back from a sunny window) | 2–3 times per week in summer, reduce in autumn and winter | Pet-safe |
| Tuberous Catmint | Direct sun (at least 4-6 hours) | Every 10–14 days in summer; minimal watering in winter dormancy | Pet-safe |
| Tuckers King Palm | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Tuerckheim Canna | Bright indirect light (just back from a sunny window) | Keep soil consistently moist; water every 4-6 days during warm months | Pet-safe |
| Tufted Fescue | Direct sun (at least 4-6 hours) | Every 10–14 days when established; more frequently for newly planted specimens | Pet-safe |
| Tulip Orchid | Bright indirect light (just back from a sunny window) | Water every 3-5 days during active spring and summer growth; significantly reduce from late autumn and rest with minimal watering (once every 3-4 weeks) through winter until new growths emerge | Pet-safe |
| Tulista Marginata | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 2-3 weeks in growth; monthly in winter | Pet-safe |
| Tulista Pumila | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 2-3 weeks in growth; monthly in winter | Pet-safe |
| Turbinicarpus pseudomacrochele | Direct sun (at least 4-6 hours) | Sparingly when fully dry in summer, roughly every 2 weeks; none in winter | Pet-safe |
| Turbinicarpus schmiedickeanus | Direct sun (at least 4-6 hours) | Sparingly when fully dry in summer, roughly every 2-3 weeks; none in winter | Pet-safe |
| Turbinicarpus valdezianus | Direct sun (at least 4-6 hours) | Very sparingly when fully dry in the growing season, roughly every 2-3 weeks; none in winter | Pet-safe |
| Turk's Head Barrel | Direct sun (at least 4-6 hours) | When soil is completely dry, approximately every 10-14 days in the growing season; every 4-6 weeks in winter | Pet-safe |
| Turkestan Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks in spring and summer; sparingly in autumn; almost none in winter | Pet-safe |
| Turkish Catmint | Direct sun (at least 4-6 hours) | Every 10–14 days in summer; very sparingly in winter | Pet-safe |
| Turkish Red Sage | Bright indirect light (just back from a sunny window) | Allow to dry between waterings | Pet-safe |
| Turkish Rosularia | Direct sun (at least 4-6 hours) | Every 2–3 weeks in the growing season; very sparingly in winter | Pet-safe |
| Turkish White Sage | Direct sun (at least 4-6 hours) | Every 10-14 days; minimal once dormant in summer heat | Pet-safe |
| Turquoise Puya | Direct sun (at least 4-6 hours) | weekly in summer, monthly in winter | Pet-safe |
| Tweedie's Lipstick Plant | Bright indirect light (just back from a sunny window) | When top 2–3 cm of compost dry out | Pet-safe |
| Tweedy's Lewisia | Bright indirect light (just back from a sunny window) | Regular in spring; near-dry from midsummer to early autumn | Pet-safe |
| Twin-Flowered Air Plant | Bright indirect light (just back from a sunny window) | Mist 2–3 times per week, or a 20-minute soak once a week | Pet-safe |
| Twin-flowered Ruschia | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 10-14 days in the growing season; very sparingly (once every 3-4 weeks) in winter | Pet-safe |
| Twinkle Oncidium | Bright indirect light (just back from a sunny window) | When the top of the mix begins to dry, about every 4-6 days | Pet-safe |
| Twinspur | Direct sun (at least 4-6 hours) | 2–3 times per week during active growth; reduce during cooler periods | Pet-safe |
| Twisted Air Plant | Bright indirect light (just back from a sunny window) | Soak 20-30 minutes weekly; mist 2-3 times per week | Pet-safe |
| Twisted Racinaea | Bright indirect light (just back from a sunny window) | Mist or drench 3-4 times per week; central cup kept lightly moist | Pet-safe |
| Twisted-Fruit Air Plant | Bright indirect light (just back from a sunny window) | Mist daily in spring through autumn; reduce in winter | Pet-safe |
| Two-Color Cattleya | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 10–14 days in the winter rest | Pet-safe |
| Two-Ranked Aechmea | Bright indirect light (just back from a sunny window) | Refresh central cup every 7–10 days; water soil every 2–3 weeks | Pet-safe |
| Two-Ranked Air Plant | Bright indirect light (just back from a sunny window) | Twice weekly in summer, once weekly in winter | Pet-safe |
| Two-ranked Bromeliad | Bright indirect light (just back from a sunny window) | Every 1–2 weeks | Pet-safe |
| Two-Row Stonecrop | Direct sun (at least 4-6 hours) | Every 10-14 days until established; essentially rain-fed once rooted | Pet-safe |
| Two-Spiked Billbergia | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (soil); cup refreshed every 2–4 weeks | Pet-safe |
| Ukhrul Fan Palm | Bright indirect light (just back from a sunny window) | Weekly during the growing season, reduced in winter | Pet-safe |
| Unarmed Hedgehog Cactus | Direct sun (at least 4-6 hours) | When soil is completely dry, every 10-14 days in summer; once a month or less in winter | Pet-safe |
| Unbranched Bur-reed | Direct sun (at least 4-6 hours) | Permanently aquatic or waterlogged; tolerates 0–60 cm (0–24 in) water depth | Pet-safe |
| Unequal-Leaf Gibbaeum | Bright indirect light (just back from a sunny window) | Sparingly in winter (active season); essentially zero in summer (June–September dormancy) | Pet-safe |
| Unequal-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10-14 days in the growing season; less in winter | Pet-safe |
| Unscented Dendrobium | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; nearly dry in the winter rest (October–February) | Pet-safe |
| Upright European Hornbeam | Direct sun (at least 4-6 hours) | Moderate; water regularly for first 2–3 seasons; rainfall-dependent once established | Pet-safe |
| Upright Nidularium | Bright indirect light (just back from a sunny window) | Weekly during growing season; reduce in winter | Pet-safe |
| Upright Prairie Coneflower | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; very drought-tolerant | Pet-safe |
| Uproar Rose zinnia | Direct sun (at least 4-6 hours) | Regular; deep watering 2–3 times per week at soil level | Pet-safe |
| Uvaia | Direct sun (at least 4-6 hours) | Weekly; keep consistently moist during establishment, more drought-tolerant once mature | Pet-safe |
| Valais fescue | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; more frequent only during establishment | Pet-safe |
| Valdez's Aztec Cactus | Bright indirect light (just back from a sunny window) | When the mix is nearly dry, roughly every 14-28 days in the growing season; once every 4-6 weeks in winter | Pet-safe |
| Vanda 'Fuchs Delight' | Direct sun (at least 4-6 hours) | Daily in warm growth; every 2-3 days when cool or low-light | Pet-safe |
| Vanda 'Miss Joaquim' | Direct sun (at least 4-6 hours) | Daily in warm, bright conditions; every 2-3 days if cooler | Pet-safe |
| Vanda 'Robert's Delight' | Direct sun (at least 4-6 hours) | Daily in warm growth; every 2-3 days in cool or dormant spells | Pet-safe |
| Vandeleur's Cape Primrose | Bright indirect light (just back from a sunny window) | Every 10–14 days; allow compost to dry slightly between waterings | Pet-safe |
| Vanilla Orchid | Bright indirect light (just back from a sunny window) | Water when the top 2-3 cm of medium is dry, roughly every 5-7 days in summer; every 10-14 days in winter | Pet-safe |
| Vanuatu Fan Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 6-9 days | Pet-safe |
| Variable Air Plant | Bright indirect light (just back from a sunny window) | Soak 30 minutes once or twice weekly; mist 2-3 times per week | Pet-safe |
| Variable Epidendrum | Bright indirect light (just back from a sunny window) | Every 4–7 days during growth; every 10–12 days in cooler months | Pet-safe |
| Variable-Hair Chirita | Bright indirect light (just back from a sunny window) | Every 7–10 days | Pet-safe |
| Variable-Leaf Pitcairnia | Bright indirect light (just back from a sunny window) | every 7–10 days in the growing season, every 14–21 days in the dry season | Pet-safe |
| Variegata Purple Moor Grass | Bright indirect light (just back from a sunny window) | Every 7-14 days; keep moderately moist to moist | Pet-safe |
| Variegated Basket Grass | Bright indirect light (just back from a sunny window) | Every 5–7 days in growing season; every 10–14 days in winter | Pet-safe |
| Variegated Carrion Flower | Bright indirect light (just back from a sunny window) | Every 14–21 days in summer; very sparingly (once monthly or less) in winter | Pet-safe |
| Variegated Elephant Bush | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 1-2 weeks in summer, monthly in winter | Pet-safe |
| Variegated Elephant Bush | Bright indirect light (just back from a sunny window) | When the top 3–4 cm of soil is dry, roughly every 10–14 days in summer and every 3–4 weeks in winter | Pet-safe |
| Variegated Greater Pond Sedge | Bright indirect light (just back from a sunny window) | Keep consistently wet — tolerates standing water | Pet-safe |
| Variegated Lady Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-10 days | Pet-safe |
| Variegated Liveforever | Bright indirect light (just back from a sunny window) | Every 10–14 days from late autumn through spring when leaves are present; withhold completely in summer dormancy | Pet-safe |
| Variegated Moon Cactus | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in growth; minimal in winter | Pet-safe |
| Variegated Purple Moor Grass | Bright indirect light (just back from a sunny window) | Regular; keep soil consistently moist | Pet-safe |
| Variegated Purple Moor Grass | Bright indirect light (just back from a sunny window) | Weekly during growing season; keep consistently moist | Pet-safe |
| variegated silver grass | Direct sun (at least 4-6 hours) | Weekly during the growing season; reduce in autumn and winter | Pet-safe |
| Variegated String of Hearts | Bright indirect light (just back from a sunny window) | When the soil is nearly dry, roughly every 10-14 days | Pet-safe |
| Variegated Sweetheart Hoya | Bright indirect light (just back from a sunny window) | When the mix is almost fully dry, every 2-3 weeks | Pet-safe |
| Variegated Velvet Grass | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Variegated Xylobium | Bright indirect light (just back from a sunny window) | Water when the top 2-3 cm of the potting medium is dry, roughly every 5-8 days in active growth; reduce to every 10-14 days in cooler months | Pet-safe |
| Varnished Air Plant | Bright indirect light (just back from a sunny window) | Weekly soak | Pet-safe |
| Vasse's Staghorn Fern | Bright indirect light (just back from a sunny window) | Weekly soaking in the growing season; fortnightly in cooler months | Pet-safe |
| Veilchenblau Rose | Bright indirect light (just back from a sunny window) | Deeply once or twice weekly while establishing; mature plants when the top few centimetres of soil dry, and they tolerate some drought | Pet-safe |
| Veitch Fir | Direct sun (at least 4-6 hours) | Weekly during establishment; moderate once mature | Pet-safe |
| Veitchia Arecina | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, roughly every 5-9 days in heat | Pet-safe |
| Velick's Air Plant | Bright indirect light (just back from a sunny window) | Weekly soak | Pet-safe |
| Velvet Ash | Direct sun (at least 4-6 hours) | Low once established; deep watering every 2–4 weeks in summer heat | Pet-safe |
| Velvet Calathea | Bright indirect light (just back from a sunny window) | When the top 2-3 cm (about 1 inch) of soil is dry, roughly every 5-7 days in the growing season | Pet-safe |
| Velvet Calathea (Furry Feather) | Bright indirect light (just back from a sunny window) | When the top 2-3cm (1 inch) of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Velvet Calathea Jungle | Bright indirect light (just back from a sunny window) | Roughly weekly; when the top 2-3 cm of soil is just dry | Pet-safe |
| Velvet Queen sunflower | Direct sun (at least 4-6 hours) | Weekly, more often in hot dry spells | Pet-safe |
| Velvet Sage | Bright indirect light (just back from a sunny window) | Weekly | Pet-safe |
| Venus Flytrap | Direct sun (at least 4-6 hours) | Keep the medium permanently wet — stand the pot in 1-2 cm of rain or distilled water and top up so it never dries | Pet-safe |
| Venus Flytrap 'Dente' | Direct sun (at least 4-6 hours) | Keep the soil constantly wet; top up the tray as it dries, near-daily in summer | Pet-safe |
| Venus Maidenhair Fern | Bright indirect light (just back from a sunny window) | Keep constantly moist, often every 2-3 days | Pet-safe |
| Verity's Liveforever | Direct sun (at least 4-6 hours) | Every 10–14 days in the cool growing season (October–April); completely dry June–September | Pet-safe |
| Verschaffelt's Peperomia | Bright indirect light (just back from a sunny window) | Every 7–10 days in growing season; every 14–21 days in winter | Pet-safe |
| Verticillata Wax Plant | Bright indirect light (just back from a sunny window) | Every 1-2 weeks; when the top 3cm of mix is dry | Pet-safe |
| Veterans' Honor Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly during growth | Pet-safe |
| Viguier's Angraecum | Bright indirect light (just back from a sunny window) | Freely throughout growing season; reduce in winter | Pet-safe |
| Villete's Living Stone | Direct sun (at least 4-6 hours) | Only when the plant's old leaf pair is fully shrivelled, roughly every 3–4 weeks during the autumn–winter growing period; none in summer dormancy | Pet-safe |
| Villete's Living Stones | Direct sun (at least 4-6 hours) | Every 3–5 weeks in autumn; none in summer or winter | Pet-safe |
| Viola 'Sorbet Raspberry' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, about every 3-5 days; containers more often | Pet-safe |
| Viola × wittrockiana 'Delta Pure Yellow' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, typically every 3-5 days; containers dry faster | Pet-safe |
| Viola cornuta 'Etain' | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, generally every 3-5 days; more in containers and heat | Pet-safe |
| Violet petunia | Direct sun (at least 4-6 hours) | Every 7–10 days in borders; containers may need more frequent watering | Pet-safe |
| Violet Sage | Direct sun (at least 4-6 hours) | Every 10–14 days once established | Pet-safe |
| Virgin Orchid | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; reduce to every 10–14 days in autumn–winter rest | Pet-safe |
| Virginia Pine Bonsai | Direct sun (at least 4-6 hours) | When the top 2-3 cm is dry, frequently daily in summer and every few days in cooler months | Pet-safe |
| Virginia Spring Beauty | Bright indirect light (just back from a sunny window) | Moderate in spring; negligible once dormant in summer | Pet-safe |
| Vivellii winter heath | Direct sun (at least 4-6 hours) | Weekly for new plantings; every 2–3 weeks for established plants during dry periods | Pet-safe |
| Volcanic Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Vriesea | Bright indirect light (just back from a sunny window) | Keep central cup filled; water soil weekly | Pet-safe |
| Vriesea 'Astrid' | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; water the mix when the top 2-3 cm is dry | Pet-safe |
| Vriesea 'Christine' | Bright indirect light (just back from a sunny window) | Keep the central cup topped up; flush and refill it weekly | Pet-safe |
| Vriesea 'Poelmanii' | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Vriesea carinata | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Vriesea fosteriana | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Vriesea hieroglyphica | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Vriesea platynema | Bright indirect light (just back from a sunny window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Wagner's Air Plant | Bright indirect light (just back from a sunny window) | 2–3 times per week (misting) or weekly soak | Pet-safe |
| Wagner's Sage | Bright indirect light (just back from a sunny window) | Water regularly to maintain consistent moisture | Pet-safe |
| Wagners Windmill Palm | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-14 days depending on season | Pet-safe |
| Waldbrunn Spruce | Direct sun (at least 4-6 hours) | Every 7-10 days while establishing; deep watering when the top 5 cm of soil dries | Pet-safe |
| Waldensian Saxifrage | Direct sun (at least 4-6 hours) | Very low — allow soil to dry between waterings; withhold almost entirely in winter | Pet-safe |
| Walker's Low Catmint | Direct sun (at least 4-6 hours) | Every 7–14 days once established | Pet-safe |
| Wall Rue | Bright indirect light (just back from a sunny window) | Rarely needs watering in the ground; water container plants only when the crevice substrate dries | Pet-safe |
| Wallich's Cranesbill | Bright indirect light (just back from a sunny window) | Once or twice weekly during dry spells once established | Pet-safe |
| Wallich's Staghorn Fern | Bright indirect light (just back from a sunny window) | Soak every 7–10 days in the growing season; every 14 days in winter | Pet-safe |
| Wallichii Staghorn Fern | Bright indirect light (just back from a sunny window) | When the shield fronds and mounting medium feel dry, roughly every 7-10 days in summer | Pet-safe |
| Wallis Fescue | Direct sun (at least 4-6 hours) | Every 14–21 days when established; minimal in winter | Pet-safe |
| Wandae Staghorn Fern | Bright indirect light (just back from a sunny window) | Soak when the mount approaches dryness, roughly weekly in summer and every 1-2 weeks in winter | Pet-safe |
| Wandering Orthophytum | Bright indirect light (just back from a sunny window) | Every 7–10 days in growth; every 14 days in winter | Pet-safe |
| Waras' Cryptanthus | Bright indirect light (just back from a sunny window) | Every 7–10 days | Pet-safe |
| Waras' Earth Star | Bright indirect light (just back from a sunny window) | When the top 2 cm of potting mix is dry, roughly every 7-10 days | Pet-safe |
| Warming's Sinningia | Bright indirect light (just back from a sunny window) | Moderate during active growth; dry during dormancy | Pet-safe |
| Warscewicz's Cattleya | Bright indirect light (just back from a sunny window) | Every 7-10 days during active growth; reduce to every 3-4 weeks during the post-flowering rest | Pet-safe |
| Warszewiczs Kohleria | Bright indirect light (just back from a sunny window) | Every 7–10 days during growth; minimal during dormancy | Pet-safe |
| Warty Brassavola | Bright indirect light (just back from a sunny window) | Every 4–6 days in active growth; every 7–10 days in cooler, slower months | Pet-safe |
| Warty Gasteria | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 2-3 weeks in summer, monthly or less in winter | Pet-safe |
| Warty Living Stone | Direct sun (at least 4-6 hours) | Every 14-21 days during active autumn-to-spring growth; completely none in summer | Pet-safe |
| Warty Living Stones | Direct sun (at least 4-6 hours) | Every 3–5 weeks in autumn; none in summer or deep winter | Pet-safe |
| Water Lily Cactus | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in spring and summer; every 3-4 weeks in autumn; almost none in winter | Pet-safe |
| Water Spangles | Bright indirect light (just back from a sunny window) | Permanent floating aquatic — sits on the water surface | Pet-safe |
| Water Speedwell | Direct sun (at least 4-6 hours) | Permanently wet to shallow submersion | Pet-safe |
| Water Violet | Bright indirect light (just back from a sunny window) | Fully submerged aquatic; grows in 20–80 cm of water | Pet-safe |
| Watermelon Peperomia | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of compost is dry, roughly every 7-14 days in summer and every 2-3 weeks in winter | Pet-safe |
| Watermelon Peperomia 'Variegata' | Bright indirect light (just back from a sunny window) | When the top half of the soil is dry, roughly every 7-10 days | Pet-safe |
| Waterwheel Plant | Direct sun (at least 4-6 hours) | Fully submerged aquatic — water IS the growing medium | Pet-safe |
| Wave Petunia | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, often daily in baskets and hot weather | Pet-safe |
| Wave purple petunia | Direct sun (at least 4-6 hours) | Every 3–5 days in containers; every 7–10 days in borders | Pet-safe |
| Wavyleaf Coneflower | Direct sun (at least 4-6 hours) | Weekly during establishment (first season); monthly or rainfall-dependent once mature | Pet-safe |
| Wax plant | Bright indirect light (just back from a sunny window) | When the soil is dry, every 10-14 days | Pet-safe |
| Weaver's Bamboo | Direct sun (at least 4-6 hours) | Deeply 2-3 times per week; daily in hot weather | Pet-safe |
| Wedge-Shaped Miltonia | Bright indirect light (just back from a sunny window) | Every 3–4 days in growth, weekly in winter | Pet-safe |
| Weeping Brown Sedge | Bright indirect light (just back from a sunny window) | Weekly or when the top 3 cm of soil is dry | Pet-safe |
| Weeping European Larch | Direct sun (at least 4-6 hours) | Weekly during establishment; less once established | Pet-safe |
| Weeping Giant Sequoia | Direct sun (at least 4-6 hours) | Every 1–2 weeks when young; monthly once established in moist climates | Pet-safe |
| Weeping Love Grass | Direct sun (at least 4-6 hours) | Every 3–4 weeks once established; weekly during establishment | Pet-safe |
| Weeping Nootka Cypress | Direct sun (at least 4-6 hours) | Regularly during establishment; moderate once mature | Pet-safe |
| Weigela 'My Monet' | Direct sun (at least 4-6 hours) | Water when the top 5 cm of soil dries, about weekly while establishing | Pet-safe |
| Weigela 'Nana Variegata' | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days once established | Pet-safe |
| Weigela 'Wine & Roses' | Direct sun (at least 4-6 hours) | Water when the top 5 cm of soil is dry, about weekly while establishing | Pet-safe |
| Weilbach's Aechmea | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (soil); refresh central tank every 3–4 weeks | Pet-safe |
| Weilbach's Aechmea | Bright indirect light (just back from a sunny window) | Refill the central cup every 5-7 days; water the medium when the top 2 cm is dry, roughly every 10-14 days | Pet-safe |
| Wendland's Bulbophyllum | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of the medium dries, roughly every 5-8 days | Pet-safe |
| Wendland's cape primrose | Bright indirect light (just back from a sunny window) | Every 7–10 days during the growing season; sparingly in winter | Pet-safe |
| Wenzel's Chain Orchid | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of the potting medium feels dry, roughly every 5-7 days | Pet-safe |
| Werner's Living Stone | Direct sun (at least 4-6 hours) | Once every 3–5 weeks during the autumn–winter growing period only; completely dry through spring and summer | Pet-safe |
| West Texas Sage | Direct sun (at least 4-6 hours) | Low; drought-tolerant once established | Pet-safe |
| Western Larch | Direct sun (at least 4-6 hours) | Weekly during establishment; thereafter relies on natural precipitation | Pet-safe |
| Western Red Cedar | Direct sun (at least 4-6 hours) | Regular — water deeply once or twice a week until established; drought-sensitive | Pet-safe |
| Western Spirea | Direct sun (at least 4-6 hours) | Every 5-7 days or as needed to keep soil consistently moist | Pet-safe |
| Western Sunflower | Direct sun (at least 4-6 hours) | Every 2–4 weeks once established; extremely drought-tolerant | Pet-safe |
| Wheat cockscomb | Direct sun (at least 4-6 hours) | Every 5–7 days in active growth; reduce in cooler periods | Pet-safe |
| Whip Brassavola | Bright indirect light (just back from a sunny window) | Every 3–5 days in summer; every 7–10 days in winter | Pet-safe |
| Whirling Butterflies Gaura | Direct sun (at least 4-6 hours) | When the top 5 cm of soil is dry, roughly every 7-14 days during the growing season | Pet-safe |
| Whirlwind Blue Fan Flower | Direct sun (at least 4-6 hours) | When the top 2-3 cm of potting mix is dry, roughly every 4-6 days in summer | Pet-safe |
| White Air Plant | Bright indirect light (just back from a sunny window) | Soak for 20–30 minutes once or twice a week | Pet-safe |
| White Beardtongue | Direct sun (at least 4-6 hours) | Every 2–3 weeks once established; minimal in winter | Pet-safe |
| White Dendrobium | Bright indirect light (just back from a sunny window) | Every 5–7 days in growth; every 2–3 weeks in winter rest | Pet-safe |
| White Egret Orchid | Bright indirect light (just back from a sunny window) | Keep consistently moist during active growth (spring–summer), roughly every 2-4 days | Pet-safe |
| White Fir | Direct sun (at least 4-6 hours) | Every 1–2 weeks during establishment; largely drought-tolerant once mature | Pet-safe |
| White Freesia | Direct sun (at least 4-6 hours) | Moderate during active growth (autumn to spring); completely dry during summer dormancy | Pet-safe |
| White Ginger Lily | Bright indirect light (just back from a sunny window) | Keep soil consistently moist, watering roughly every 3-5 days during active growth | Pet-safe |
| White laceflower | Direct sun (at least 4-6 hours) | Every 5–7 days; allow the top 2 cm of soil to dry between waterings | Pet-safe |
| White Laelia | Bright indirect light (just back from a sunny window) | Every 5–7 days in spring and autumn; once every 2–3 weeks in summer dry rest | Pet-safe |
| White Magic Flower | Bright indirect light (just back from a sunny window) | Keep evenly moist spring through autumn; withhold entirely in winter | Pet-safe |
| White mountain heather | Direct sun (at least 4-6 hours) | Consistently moist during the growing season; reduce in winter | Pet-safe |
| White Passionflower | Direct sun (at least 4-6 hours) | Once a week during dry spells; less in winter | Pet-safe |
| White Perfection Darley Dale heath | Direct sun (at least 4-6 hours) | Weekly during establishment; every 2–3 weeks once established | Pet-safe |
| White Spider Orchid | Bright indirect light (just back from a sunny window) | Moderate during autumn to spring; completely dry in summer | Pet-safe |
| White Stonecrop | Direct sun (at least 4-6 hours) | When soil is dry, roughly every 10-14 days in summer; little to none in winter | Pet-safe |
| White Temple Bells | Bright indirect light (just back from a sunny window) | When the top 2 cm of soil is dry, roughly every 7 days during active growth | Pet-safe |
| White Tiger Nerve Plant | Bright indirect light (just back from a sunny window) | Every 5–7 days; keep soil evenly and consistently moist | Pet-safe |
| White Trumpet Pitcher | Direct sun (at least 4-6 hours) | Keep constantly wet via the tray method, standing in 1-3 cm of water through the growing season | Pet-safe |
| white trumpet sinningia | Bright indirect light (just back from a sunny window) | Every 7–10 days in active growth; reduce to rare misting or none during dormancy | Pet-safe |
| White-Bark Magnolia | Bright indirect light (just back from a sunny window) | Weekly during dry spells for the first 3 years; every 2 weeks when established | Pet-safe |
| White-Branch Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| White-Flowered Crown Cactus | Direct sun (at least 4-6 hours) | Every 10-14 days in summer; once a month or less from October to February | Pet-safe |
| White-Flowered Lycaste | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 14–21 days during winter rest | Pet-safe |
| White-haired Crown Cactus | Direct sun (at least 4-6 hours) | Weekly in summer; every 10–14 days in spring and autumn; once a month or none in winter | Pet-safe |
| White-Leaf Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in the growing season; reduce to monthly or less in winter | Pet-safe |
| White-Lip Oncidium | Bright indirect light (just back from a sunny window) | Every 5–7 days in active growth; every 14–21 days in winter rest | Pet-safe |
| White-Powder Bamboo | Direct sun (at least 4-6 hours) | Weekly in the growing season; fortnightly when dormant | Pet-safe |
| White-red Trichocentrum | Bright indirect light (just back from a sunny window) | When bark is nearly dry, every 6-9 days in growth; every 10-14 days in cooler, lower-light months | Pet-safe |
| White-Spined Thelocactus | Direct sun (at least 4-6 hours) | When the soil is completely dry, roughly every 14-21 days in the growing season; suspend almost entirely in winter. | Pet-safe |
| Whitley's Speedwell | Direct sun (at least 4-6 hours) | Every 10–14 days during active growth; minimal in winter | Pet-safe |
| Whorled Rosinweed | Bright indirect light (just back from a sunny window) | Every 1-2 weeks once established | Pet-safe |
| Whorled Water Milfoil | Direct sun (at least 4-6 hours) | Permanently submerged | Pet-safe |
| Wickwar Flame heather | Direct sun (at least 4-6 hours) | Weekly during establishment, then as needed | Pet-safe |
| Wide Eye Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks in autumn to late winter; none in summer | Pet-safe |
| Wide-Leaved Sea Lavender | Direct sun (at least 4-6 hours) | Every 2–3 weeks when established | Pet-safe |
| Wild Edric Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly in the growing season, more in heat or sandy soil | Pet-safe |
| Wild jasmine | Bright indirect light (just back from a sunny window) | Once or twice a week during active growth; reduce in winter | Pet-safe |
| Wild nemesia | Direct sun (at least 4-6 hours) | Every 7–14 days once established; more frequently when young | Pet-safe |
| Wild pansy | Bright indirect light (just back from a sunny window) | Every 5–7 days; keep soil evenly moist but not wet | Pet-safe |
| Wild Rose | Direct sun (at least 4-6 hours) | Weekly while establishing, then rarely once mature | Pet-safe |
| Wild's Pincushion | Direct sun (at least 4-6 hours) | Every 10-14 days in summer; once every 3-4 weeks in winter | Pet-safe |
| Wildeve Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly while growing, increasing in heat and on free-draining soils | Pet-safe |
| William Buchanan heath | Bright indirect light (just back from a sunny window) | Moderate; water regularly, especially during flowering and in dry summers | Pet-safe |
| William Shakespeare 2000 Rose | Direct sun (at least 4-6 hours) | Deeply once or twice weekly through the growing season, more in heat | Pet-safe |
| Wilman's Ebracteola | Direct sun (at least 4-6 hours) | When soil is completely dry, roughly every 10-14 days during the spring-autumn growing season; very sparingly (once every 4-6 weeks) in winter | Pet-safe |
| Wilmot's Dinteranthus | Direct sun (at least 4-6 hours) | Autumn only (2 watering cycles); stop completely in spring while new leaves emerge; minimal in early winter | Pet-safe |
| Wilmot's Dinteranthus | Direct sun (at least 4-6 hours) | Every 3–5 weeks during autumn through early spring; completely dry June–August | Pet-safe |
| Wilson Spruce | Direct sun (at least 4-6 hours) | Weekly when young; established trees are drought-tolerant | Pet-safe |
| Window Plant | Direct sun (at least 4-6 hours) | Every 3–4 weeks in spring and summer; minimal in winter | Pet-safe |
| Wine-Colored Alcantarea | Direct sun (at least 4-6 hours) | Keep the central tank filled with fresh water; water the root zone when the top 3-4 cm is dry, roughly every 7-14 days | Pet-safe |
| Winged Encyclia | Bright indirect light (just back from a sunny window) | When the pot is dry, roughly every 7-10 days in summer | Pet-safe |
| Winged Peperomia | Bright indirect light (just back from a sunny window) | Every 2–3 weeks (allow compost to dry almost fully between waterings) | Pet-safe |
| Winter heath | Direct sun (at least 4-6 hours) | Established plants: every 2–3 weeks in dry spells; new plants: weekly for the first season | Pet-safe |
| Wisley 2008 Rose | Direct sun (at least 4-6 hours) | Deeply once or twice a week in the growing season; more in heat or sandy soil | Pet-safe |
| Witchgrass | Direct sun (at least 4-6 hours) | Rainfall sufficient in most climates; supplemental water only if very dry | Pet-safe |
| Witteberg Cone Plant | Bright indirect light (just back from a sunny window) | Every 2–3 weeks in autumn–winter; almost none in summer | Pet-safe |
| Wittig's Sophronitis | Bright indirect light (just back from a sunny window) | When the growing medium surface approaches dryness, roughly every 6-9 days | Pet-safe |
| Wonderful Wax Plant | Bright indirect light (just back from a sunny window) | Every 7–14 days in the growing season, monthly in winter | Pet-safe |
| wood small-reed | Direct sun (at least 4-6 hours) | Drought-tolerant once established; occasional deep watering in first season | Pet-safe |
| Woodland Sage | Direct sun (at least 4-6 hours) | Low to moderate; drought tolerant once established | Pet-safe |
| Woolly Lip Fern | Bright indirect light (just back from a sunny window) | When the soil is completely dry, approximately every 14-21 days in summer, monthly in winter | Pet-safe |
| Woolly Rock Jasmine | Direct sun (at least 4-6 hours) | Moderate in summer; very little in winter | Pet-safe |
| Woolly Rose | Bright indirect light (just back from a sunny window) | When the soil is fully dry, roughly every 10-14 days in summer | Pet-safe |
| Woolly Sinningia | Bright indirect light (just back from a sunny window) | When top 2–3 cm of compost feels dry during growth | Pet-safe |
| Woolly Weingartia | Direct sun (at least 4-6 hours) | When the soil is fully dry, roughly every 10-14 days in the growing season; once monthly or less in winter. | Pet-safe |
| Woven Matucana | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, every 10-14 days in summer | Pet-safe |
| Wulfen's Alyssum | Direct sun (at least 4-6 hours) | Every 14–21 days during growing season; very little in winter | Pet-safe |
| Xalapa Sage | Direct sun (at least 4-6 hours) | Allow the top 5 cm of soil to dry between waterings | Pet-safe |
| Yellow Baby Toes | Direct sun (at least 4-6 hours) | Every 2–3 weeks during active growth (autumn through spring); essentially none through summer dormancy | Pet-safe |
| Yellow Birch | Direct sun (at least 4-6 hours) | Consistently moist; water deeply 1-2 times per week during establishment and in dry spells | Pet-safe |
| Yellow Cabomba | Bright indirect light (just back from a sunny window) | Fully submerged aquatic; maintain in aquarium water continuously | Pet-safe |
| Yellow Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks in autumn; withhold entirely in summer | Pet-safe |
| Yellow Cone Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks from late summer through early spring; fully dry throughout June–August | Pet-safe |
| Yellow coneflower | Direct sun (at least 4-6 hours) | Every 1–2 weeks during establishment; every 2–4 weeks once established | Pet-safe |
| Yellow Dragon Fruit | Direct sun (at least 4-6 hours) | Every 10-14 days in growth; let the top half of the mix dry first | Pet-safe |
| Yellow Episcia | Bright indirect light (just back from a sunny window) | When the top 1–2 cm of soil is dry | Pet-safe |
| Yellow Giant Hyssop | Bright indirect light (just back from a sunny window) | Every 7–10 days during the growing season; minimal in winter | Pet-safe |
| Yellow Groove Bamboo | Direct sun (at least 4-6 hours) | Weekly in the growing season; every 2 weeks when dormant | Pet-safe |
| Yellow Ice Plant | Direct sun (at least 4-6 hours) | Every 2–3 weeks during the growing season; minimal to none in winter | Pet-safe |
| Yellow Latan Palm | Direct sun (at least 4-6 hours) | Every 7–10 days in summer; every 14–21 days in winter | Pet-safe |
| Yellow Latan Palm | Direct sun (at least 4-6 hours) | When the top 5-8 cm of soil is dry, roughly every 10-14 days in summer; every 3-4 weeks in winter | Pet-safe |
| Yellow Living Rock Cactus | Direct sun (at least 4-6 hours) | When soil is fully dry, roughly every 21 days in summer; near-dry in winter | Pet-safe |
| Yellow Marliac Water Lily | Direct sun (at least 4-6 hours) | Permanently aquatic — crown submerged 15–75 cm (6–30 in) below water surface | Pet-safe |
| Yellow Mombin | Direct sun (at least 4-6 hours) | Every 7–14 days; highly drought-tolerant when established | Pet-safe |
| Yellow Monkeyflower | Bright indirect light (just back from a sunny window) | Keep soil permanently wet; never allow to dry out | Pet-safe |
| Yellow Moth Orchid | Bright indirect light (just back from a sunny window) | When the bark is nearly dry, typically every 7-10 days | Pet-safe |
| Yellow Mountain Saxifrage | Direct sun (at least 4-6 hours) | Every 2–4 days during the growing season; keep consistently moist | Pet-safe |
| Yellow Pitaya | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, roughly every 7-10 days in summer; every 2-4 weeks in winter | Pet-safe |
| Yellow Pitcher Plant | Direct sun (at least 4-6 hours) | Keep permanently wet; stand the pot in 1-3 cm of water during the growing season (tray method) | Pet-safe |
| Yellow Tower Cactus | Direct sun (at least 4-6 hours) | When the top 3-5 cm of soil is dry, every 7-14 days in spring and summer; every 4-6 weeks in autumn; once monthly or less in winter | Pet-safe |
| Yellow Trumpet Pitcher | Direct sun (at least 4-6 hours) | Keep the growing medium permanently moist using the tray method — 3-5 cm of water in the saucer at all times | Pet-safe |
| Yellow Water Lily | Direct sun (at least 4-6 hours) | Permanently aquatic — crown submerged 15–45 cm (6–18 in) below water surface | Pet-safe |
| Yellow Whitlowgrass | Direct sun (at least 4-6 hours) | Every 10–14 days in the growing season; minimal in winter | Pet-safe |
| Yellow-flowered Sage | Direct sun (at least 4-6 hours) | Every 7-10 days during active growth; very sparingly in winter | Pet-safe |
| Yellow-Spike Peperomia | Bright indirect light (just back from a sunny window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Yellow-Twig Dogwood | Bright indirect light (just back from a sunny window) | Regularly; keep soil consistently moist | Pet-safe |
| Yellow-White Maxillaria | Bright indirect light (just back from a sunny window) | Every 2–3 days in growth, every 4–5 days in winter | Pet-safe |
| Yellowish Miltonia | Bright indirect light (just back from a sunny window) | Every 2–3 days in summer, every 4–5 days in winter | Pet-safe |
| Young's Weeping Birch | Bright indirect light (just back from a sunny window) | Weekly during establishment and dry spells; every 2 weeks once mature | Pet-safe |
| Yulan Magnolia | Direct sun (at least 4-6 hours) | Weekly when young; established trees need water during prolonged dry spells | Pet-safe |
| Yuletide Sasanqua Camellia | Bright indirect light (just back from a sunny window) | Every 5-7 days in summer; reduce in winter but do not let dry out | Pet-safe |
| Yunnan Cypress | Direct sun (at least 4-6 hours) | Regular during establishment; drought-tolerant once mature | Pet-safe |
| Yunnan Dwarf Palm | Bright indirect light (just back from a sunny window) | Every 7–10 days in summer, monthly in winter | Pet-safe |
| Za Baobab | Direct sun (at least 4-6 hours) | Twice weekly in summer; once a month or less in winter | Pet-safe |
| Zahn's Guzmania | Bright indirect light (just back from a sunny window) | Refill cup every 7–10 days; flush monthly | Pet-safe |
| Zahn's Guzmania | Bright indirect light (just back from a sunny window) | Keep the central tank topped up; flush every 7-10 days; water soil only when the top 3 cm is dry | Pet-safe |
| Zebra Basket Vine | Bright indirect light (just back from a sunny window) | When the top 3-4 cm of potting mix is dry, roughly every 7-10 days in the growing season | Pet-safe |
| Zebra Grass | Direct sun (at least 4-6 hours) | Weekly for the first season; every 2–3 weeks once established | Pet-safe |
| Zebra Plant | Bright indirect light (just back from a sunny window) | Keep evenly moist; water little and often, roughly when the top third of the mix dries | Pet-safe |
| Zebra Plant (Calathea Zebrina) | Bright indirect light (just back from a sunny window) | Roughly weekly; keep soil evenly moist, never soggy or bone-dry | Pet-safe |
| Zebra Plant Aphelandra | Bright indirect light (just back from a sunny window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days in the growing season | Pet-safe |
| Zebra Plant Calathea | Bright indirect light (just back from a sunny window) | Roughly weekly; when the top of the soil begins to dry | Pet-safe |
| Zehtner's Discocactus | Direct sun (at least 4-6 hours) | When the top 4-5 cm of soil is completely dry, roughly every 10-14 days in summer; reduce to once every 4-6 weeks in winter | Pet-safe |
| Zehtner's Turk's Cap | Direct sun (at least 4-6 hours) | When the top 2-3 cm of soil is dry, roughly every 7-10 days in summer; reduce to once every 3-4 weeks in winter | Pet-safe |
| Zephirine Drouhin Rose | Direct sun (at least 4-6 hours) | Deeply once a week in the growing season; more in heat or during establishment | Pet-safe |
| Zigzag Bamboo | Direct sun (at least 4-6 hours) | Weekly in the growing season; fortnightly in winter | Pet-safe |
| Zinnia | Direct sun (at least 4-6 hours) | Deep watering once a week | Pet-safe |
| Zinnia 'Benary's Giant' | Direct sun (at least 4-6 hours) | When top 3-4 cm of soil is dry, roughly every 4-6 days in summer | Pet-safe |
| Zinnia 'Profusion' | Direct sun (at least 4-6 hours) | When top 2-3 cm of soil is dry, every 4-7 days; containers more often | Pet-safe |
| Zinnia elegans 'Benary's Giant Coral' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, about every 4-7 days | Pet-safe |
| Zinnia elegans 'Profusion Cherry' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, about every 5-7 days | Pet-safe |
| Zinnia elegans 'Zahara Starlight Rose' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, about every 5-7 days | Pet-safe |
| Zinnia haageana 'Old Mexico' | Direct sun (at least 4-6 hours) | When the top 3-4 cm of soil is dry, about every 5-7 days | Pet-safe |
| Zombie Palm | Direct sun (at least 4-6 hours) | Every 10–14 days in summer; every 21–28 days in winter | Pet-safe |
| Zoys's Bellflower | Direct sun (at least 4-6 hours) | Allow soil to dry between waterings; very sparingly in winter | Pet-safe |
| Zuiko Nishiki Lady Palm | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of soil is dry, about every 7-10 days | Pet-safe |
| Zygopetalum 'Artur Elle' | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth, every 5-7 days, easing back as pseudobulbs mature | Pet-safe |
| Zygopetalum 'Blue Eyes' | Bright indirect light (just back from a sunny window) | Keep evenly moist, watering when the surface starts to dry, roughly every 4-6 days | Pet-safe |
| Zygopetalum 'Redvale' | Bright indirect light (just back from a sunny window) | When the top 2-3 cm of mix is approaching dry, roughly every 5-7 days | Pet-safe |
| Zygopetalum 'Titanic' | Bright indirect light (just back from a sunny window) | Keep evenly moist during growth, every 5-7 days, reducing as pseudobulbs mature | Pet-safe |
| Zygopetalum intermedium | Bright indirect light (just back from a sunny window) | Keep evenly moist during growth, every 5-7 days, reducing once pseudobulbs mature | Pet-safe |
| Zygopetalum mackaii | Bright indirect light (just back from a sunny window) | Keep evenly moist in growth, every 5-7 days, easing off after the pseudobulbs mature | Pet-safe |