| Abiqua Drinking Gourd Hosta | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Toxic to pets |
| Abyssinian Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Adiantum venustum | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to dry, roughly every 4-6 days | Pet-safe |
| Aerangis fastuosa | Medium indirect light (a couple of metres from a window) | Water every 1-3 days, keeping the roots consistently moist | Pet-safe |
| Aesculifolia Rodgersia | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply 1-2 times weekly, more in heat | Mildly toxic to pets |
| African violet | Medium indirect light (a couple of metres from a window) | When the top of the soil feels just dry, every 5-7 days | Pet-safe |
| Aglaonema 'Emerald Beauty' | Low light (north window or shaded room) | When the top 3-4 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Aglaonema 'First Diamond' | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema 'Siam Aurora' (Red Chinese Evergreen) | Medium indirect light (a couple of metres from a window) | Every 7-10 days; when the top 1-2 inches of soil are dry | Toxic to pets |
| Aglaonema 'Sparkling Sarah' | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema (Chinese Evergreen) | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm (1 inch) of compost is dry, roughly every 7-10 days in growth | Toxic to pets |
| Aglaonema Burmese Evergreen | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Chocolate | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Cutlass | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Aglaonema Dud Unyamanee | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Emerald Bay | Low light (north window or shaded room) | When top 3-5 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Aglaonema Gemini | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Golden Bay | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Jubilee Petite | Low light (north window or shaded room) | When top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Malay Beauty | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Maria | Low light (north window or shaded room) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Modestum | Low light (north window or shaded room) | When top 3-5 cm of soil is dry, roughly every 7-14 days | Toxic to pets |
| Aglaonema nitidum | Low light (north window or shaded room) | When the top 3-4 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Aglaonema Pictum Bicolor | Medium indirect light (a couple of metres from a window) | When top 2-3 cm of soil is dry, roughly every 5-9 days | Toxic to pets |
| Aglaonema Pink Beauty | Medium indirect light (a couple of metres from a window) | When top 3-5 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Aglaonema Prosperity | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Red | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Aglaonema Rotundum | Medium indirect light (a couple of metres from a window) | When top 2-3 cm of soil is dry, roughly every 5-9 days | Toxic to pets |
| Aglaonema Silver Bay | Low light (north window or shaded room) | When the top 3-5 cm of soil is dry, roughly every 7-14 days | Toxic to pets |
| Aglaonema Silver Queen | Low light (north window or shaded room) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Spring Snow | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Stripes | Low light (north window or shaded room) | When top 3-5 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Aglaonema Super White | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Aglaonema Tigress | Low light (north window or shaded room) | When top 3-5 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Alabama Lip Fern | Medium indirect light (a couple of metres from a window) | every 2-3 weeks | Mildly toxic to pets |
| all gold Japanese forest grass | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water 1-2 times weekly, more in dry or warm spells | Mildly toxic to pets |
| Allegheny Spurge | Low light (north window or shaded room) | Weekly during the first 1–2 growing seasons; every 2–3 weeks once established | Mildly toxic to pets |
| Alpine Lady Fern | Medium indirect light (a couple of metres from a window) | 2–3 times per week; more frequently in warm weather | Pet-safe |
| Alpine Squill | Medium indirect light (a couple of metres from a window) | Water during growth; dry during summer dormancy | Toxic to pets |
| Alpine Woodsia | Medium indirect light (a couple of metres from a window) | every 1-2 weeks during the growing season | Mildly toxic to pets |
| Amalia's Dragon Orchid | Medium indirect light (a couple of metres from a window) | Daily to every other day; medium must stay damp but not sodden | Pet-safe |
| American alumroot | Medium indirect light (a couple of metres from a window) | Once or twice per week; reduce in winter | Pet-safe |
| American Climbing Fern | Medium indirect light (a couple of metres from a window) | Keep the soil consistently and evenly moist — never allow it to dry out between waterings | Mildly toxic to pets |
| American Lady Fern | Low light (north window or shaded room) | Every 2–3 days during active growth; less frequently in winter | Pet-safe |
| American Royal Fern | Medium indirect light (a couple of metres from a window) | Twice weekly or more; keep consistently moist | Pet-safe |
| American Wall Fern | Medium indirect light (a couple of metres from a window) | Every 7–10 days when in growth; every 2–3 weeks in winter | Pet-safe |
| American Wood Anemone | Medium indirect light (a couple of metres from a window) | Weekly during active spring growth; none during summer dormancy | Toxic to pets |
| Amethyst Porroglossum | Medium indirect light (a couple of metres from a window) | Daily if mounted; every 1–2 days if potted; do not dry out | Pet-safe |
| Anadendrum Latifolium | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days | Mildly toxic to pets |
| Anadendrum Michaelii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Toxic to pets |
| Anadendrum Montanum | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of mix is dry, roughly every 5-7 days | Mildly toxic to pets |
| Anderson's Holly Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Anderson's Holly Fern | Medium indirect light (a couple of metres from a window) | Twice weekly in the growing season, weekly in winter | Pet-safe |
| Angel Frost Masdevallia | Medium indirect light (a couple of metres from a window) | Daily in hot weather; every 2–3 days in spring and autumn | Pet-safe |
| Anoectochilus roxburghii | Low light (north window or shaded room) | Keep evenly moist, watering roughly every 3-5 days as the surface begins to dry | Pet-safe |
| Anthurium debile | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of mix is just dry, about every 5-8 days | Toxic to pets |
| Anubias afzelii | Low light (north window or shaded room) | Submerged full-time; change 20-30% of tank water weekly | Mildly toxic to pets |
| Anubias barteri var. barteri | Low light (north window or shaded room) | Submerged full-time; change 20-30% of tank water weekly | Mildly toxic to pets |
| Anubias barteri var. nana | Low light (north window or shaded room) | Submerged full-time; change 20-30% of tank water weekly | Mildly toxic to pets |
| Anubias barteri var. nana 'Petite' | Low light (north window or shaded room) | Submerged full-time; change 20-30% of tank water weekly | Mildly toxic to pets |
| Anubias congensis | Low light (north window or shaded room) | Submerged full-time; change 20-30% of tank water weekly | Mildly toxic to pets |
| Anubias gigantea | Low light (north window or shaded room) | Submerged or emersed; change 20-30% of tank water weekly | Mildly toxic to pets |
| Anubias hastifolia | Low light (north window or shaded room) | Submerged full-time; change 20-30% of tank water weekly | Mildly toxic to pets |
| Aponogeton crispus | Medium indirect light (a couple of metres from a window) | Permanently submerged in a maintained aquarium; partial water changes | Mildly toxic to pets |
| Appalachian Barren Strawberry | Medium indirect light (a couple of metres from a window) | Low to moderate; drought-tolerant once established | Pet-safe |
| Aquilegia 'Black Barlow' | Medium indirect light (a couple of metres from a window) | Water when the top 3 cm of soil dries, roughly weekly | Mildly toxic to pets |
| Aquilegia 'Nora Barlow' | Medium indirect light (a couple of metres from a window) | Water when the top 3 cm of soil dries, about weekly | Mildly toxic to pets |
| Arabian Spiral Flag | Medium indirect light (a couple of metres from a window) | Water regularly to maintain evenly moist soil; do not allow more than the top 2 cm to dry between waterings. | Mildly toxic to pets |
| Arendsii astilbe | Medium indirect light (a couple of metres from a window) | 2–3 times per week in summer; weekly otherwise | Pet-safe |
| Arisaema consanguineum | Medium indirect light (a couple of metres from a window) | Keep evenly moist during growth, about every 4-7 days; ease off as it dies back | Toxic to pets |
| Arisaema elephas | Medium indirect light (a couple of metres from a window) | Keep evenly moist during growth, about every 4-7 days; reduce as it dies back | Toxic to pets |
| Arisaema flavum | Medium indirect light (a couple of metres from a window) | Keep evenly moist during active growth (spring to late summer); withhold once dormant | Toxic to pets |
| Arisaema griffithii | Medium indirect light (a couple of metres from a window) | Keep evenly moist through growth, roughly every 4-7 days; reduce sharply once foliage yellows | Toxic to pets |
| Arisaema ringens | Medium indirect light (a couple of metres from a window) | Keep evenly moist during growth, about every 4-7 days; reduce as it dies back | Toxic to pets |
| Arisaema speciosum | Medium indirect light (a couple of metres from a window) | Keep evenly moist through growth, about every 4-7 days; reduce as it dies back | Toxic to pets |
| Arisaema tortuosum | Medium indirect light (a couple of metres from a window) | Keep moist through the growing season, about every 4-7 days; reduce as it dies back | Toxic to pets |
| Aromatic Didymocarpus | Medium indirect light (a couple of metres from a window) | Once or twice a week in the growing season; reduce in winter | Pet-safe |
| Arum italicum | Medium indirect light (a couple of metres from a window) | Keep evenly moist in active growth (autumn to spring); reduce sharply during summer dormancy | Toxic to pets |
| Asian Wonder Bamboo | Medium indirect light (a couple of metres from a window) | 2-3 times per week during active growth; once per week in cool or dormant periods | Pet-safe |
| Asplenium platyneuron | Low light (north window or shaded room) | Water when the top 2-3 cm is dry; tolerates short dry spells better than most ferns | Pet-safe |
| Astilbe 'Bridal Veil' | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply 1-2 times weekly, more in heat | Mildly toxic to pets |
| Astilbe chinensis 'Pumila' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil begins to dry; keep evenly moist, often 2-3 times weekly in heat | Mildly toxic to pets |
| Astilbe simplicifolia 'Sprite' | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply 1-2 times weekly, more in heat | Mildly toxic to pets |
| Athyrium angustum f. rubellum 'Lady in Red' | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist, watering when the top 2-3 cm dries, roughly every 4-6 days | Mildly toxic to pets |
| Athyrium filix-femina 'Frizelliae' | Low light (north window or shaded room) | Keep evenly moist; water every 4-6 days, more in hot weather | Mildly toxic to pets |
| Athyrium filix-femina 'Minutissimum' | Low light (north window or shaded room) | Keep consistently moist; water every 4-6 days, more in heat | Mildly toxic to pets |
| Athyrium niponicum 'Red Beauty' | Low light (north window or shaded room) | Keep evenly moist; water every 4-6 days, more often in heat | Mildly toxic to pets |
| Athyrium niponicum 'Ursula's Red' | Low light (north window or shaded room) | Keep evenly moist; water every 4-6 days, increasing in hot weather | Mildly toxic to pets |
| Athyrium otophorum | Low light (north window or shaded room) | Keep evenly moist; water every 4-6 days, more in heat | Mildly toxic to pets |
| Aucuba japonica Crotonifolia | Low light (north window or shaded room) | Water to establish, then every 7-14 days in dry spells; less in cool months | Mildly toxic to pets |
| Aucuba japonica Picturata | Low light (north window or shaded room) | When the top 3-5 cm of soil is dry, about weekly while establishing then less often | Mildly toxic to pets |
| Aucuba japonica Rozannie | Low light (north window or shaded room) | When the top 3-5 cm of soil is dry, roughly weekly in the first year then far less once established | Mildly toxic to pets |
| Ayabaca Masdevallia | Medium indirect light (a couple of metres from a window) | Every 2–3 days; keep medium consistently moist | Pet-safe |
| Bahian Earth Star | Medium indirect light (a couple of metres from a window) | Every 7–10 days | Pet-safe |
| Balkan Sage | Medium indirect light (a couple of metres from a window) | Weekly during dry spells | Pet-safe |
| Ball Moss | Medium indirect light (a couple of metres from a window) | Mist or briefly submerge 2–3 times a week in summer; 1–2 times a week in winter | Pet-safe |
| Bamboo Palm | Medium indirect light (a couple of metres from a window) | Every 7–10 days (keep soil evenly moist but never waterlogged) | Pet-safe |
| bamburanta | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; every 10–14 days in winter | Pet-safe |
| Barla's Masdevallia | Medium indirect light (a couple of metres from a window) | Daily or every 2 days; roots should never dry out completely | Pet-safe |
| Barren Strawberry | Medium indirect light (a couple of metres from a window) | Low to moderate; drought-tolerant once established | Pet-safe |
| Basket Bromeliad | Medium indirect light (a couple of metres from a window) | Tank every 5–7 days; soil every 10–14 days | Pet-safe |
| Beacon Silver Dead Nettle | Medium indirect light (a couple of metres from a window) | Every 7–10 days; water more frequently in sunny or dry situations | Pet-safe |
| Beaked Homalomena | Low light (north window or shaded room) | Every 7–14 days; reduce in winter | Toxic to pets |
| Beautiful Besleria | Medium indirect light (a couple of metres from a window) | Every 5–7 days, year-round | Pet-safe |
| Beautiful-net Lepanthes | Medium indirect light (a couple of metres from a window) | Daily to every 2 days; never allow roots to dry out completely | Pet-safe |
| Beehive Ginger | Medium indirect light (a couple of metres from a window) | Water consistently to keep soil moist; do not allow dryout during the growing season. | Mildly toxic to pets |
| Begonia 'Nonstop Joy White' | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water when the surface begins to dry, often every 2-4 days in summer pots | Toxic to pets |
| Begonia 'Picotee Lace Pink' | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water when the surface begins to dry, often every 2-4 days in summer pots | Toxic to pets |
| Begonia 'Pin Up Flame' | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water when the surface begins to dry, often every 2-4 days in summer pots | Toxic to pets |
| Begonia ferox | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of substrate is dry, roughly every 4-7 days | Toxic to pets |
| Begonia grandis subsp. evansiana | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist in summer; water during dry spells, roughly weekly in heat | Toxic to pets |
| Begonia hatacoa | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is just dry, roughly every 4-6 days | Toxic to pets |
| Begonia imperialis | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-9 days in growth | Toxic to pets |
| Begonia pavonina | Low light (north window or shaded room) | Keep soil consistently lightly moist, never dry and never soggy | Toxic to pets |
| Begonia prismatocarpa | Medium indirect light (a couple of metres from a window) | Keep the medium consistently moist; check every 3-5 days | Toxic to pets |
| Begonia pustulata | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-9 days in growth | Toxic to pets |
| Begonia U-377 | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to dry, often every 4-6 days | Toxic to pets |
| Bella Palm | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about every 5-7 days in growth | Pet-safe |
| Bellflower Codonopsis | Medium indirect light (a couple of metres from a window) | Water when the top 2–3 cm of soil is dry during the growing season; reduce significantly in winter | Mildly toxic to pets |
| Benedict's Dragon Orchid | Medium indirect light (a couple of metres from a window) | Every 1–2 days during growth; morning fogging in winter rest | Pet-safe |
| Beni-kaze Hakone Grass | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water 1-2 times weekly, more in heat | Mildly toxic to pets |
| Bent Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist through spring; tolerates slightly drier conditions during summer dormancy | Mildly toxic to pets |
| Berry Smoothie Heuchera | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly | Pet-safe |
| Bertolonia Marmorata | Medium indirect light (a couple of metres from a window) | Keep evenly moist at all times; water as the surface starts to dry, often every 3-5 days | Pet-safe |
| Betel Leaf | Medium indirect light (a couple of metres from a window) | When the top 2–3 cm of soil are dry, typically every 4–6 days indoors | Mildly toxic to pets |
| Bicolor Barrenwort | Low light (north window or shaded room) | Regularly in the first season; once established, once every 2–3 weeks or rely on rainfall | Mildly toxic to pets |
| Bird-in-a-bush | Medium indirect light (a couple of metres from a window) | Moderate in spring during active growth; dry during summer dormancy | Toxic to pets |
| Bird's Nest Bromeliad | Low light (north window or shaded room) | Refill central cup weekly; substrate every 10–14 days | Pet-safe |
| Bird's Nest Fern 'Crissie' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, often every 7-10 days | Pet-safe |
| Bird's Nest Fern 'Osaka' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, often every 7-10 days | Pet-safe |
| Bird's Nest Fern 'Victoria' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, often every 7-10 days | Pet-safe |
| Bird's-nest Orchid | Low light (north window or shaded room) | Not applicable for cultivation; in nature, reliant on consistently moist woodland humus | Mildly toxic to pets |
| Birdcatcher Parlour Palm | Low light (north window or shaded room) | Every 10–14 days in summer, every 2–3 weeks in winter | Pet-safe |
| Biting Porroglossum | Medium indirect light (a couple of metres from a window) | Daily or every other day; medium must not dry out | Pet-safe |
| Bitter Vetch | Medium indirect light (a couple of metres from a window) | Moderate — allow soil to approach dryness between waterings | Mildly toxic to pets |
| Black Cohosh | Medium indirect light (a couple of metres from a window) | 2–3 times per week in summer; weekly in cooler seasons | Mildly toxic to pets |
| Black Fang Begonia | Medium indirect light (a couple of metres from a window) | Every 10–14 days; allow top 2–3 cm to dry | Toxic to pets |
| Black Mondo Grass | Medium indirect light (a couple of metres from a window) | Once a week during the growing season; reduce in winter | Mildly toxic to pets |
| Black Scallop Bugle | Medium indirect light (a couple of metres from a window) | Once or twice weekly; reduce to once weekly when established | Mildly toxic to pets |
| Black Spleenwort | Medium indirect light (a couple of metres from a window) | Weekly in the growing season; sparingly in winter | Mildly toxic to pets |
| Black-Seeded Melic | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water in dry spells, especially in lighter shade | Mildly toxic to pets |
| Black-stemmed Spleenwort | Medium indirect light (a couple of metres from a window) | When the top centimetre of substrate feels dry | Pet-safe |
| Blechnum chilense | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 4-6 days | Mildly toxic to pets |
| Bleeding Heart | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry; roughly weekly, keeping soil consistently moist in spring | Toxic to pets |
| Bleeding Heart | Medium indirect light (a couple of metres from a window) | Every 5–7 days in spring; taper off as foliage yellows; minimal when dormant | Toxic to pets |
| Blister plant | Low light (north window or shaded room) | Every 3–5 days; never allow to dry out | Pet-safe |
| Blood-red Bertolonia | Medium indirect light (a couple of metres from a window) | Every 4–6 days; keep medium consistently moist | Pet-safe |
| Blood-red Guzmania | Medium indirect light (a couple of metres from a window) | Refill tank every 5–7 days; flush monthly | Pet-safe |
| Blood-red Restrepia | Medium indirect light (a couple of metres from a window) | Every 2–4 days; keep medium consistently lightly moist | Pet-safe |
| Bloodroot | Medium indirect light (a couple of metres from a window) | Every 5–7 days during spring growth; minimal or none during summer dormancy | Toxic to pets |
| Blue Cohosh | Low light (north window or shaded room) | Every 5–7 days; maintain consistently moist soil | Toxic to pets |
| Blue Columbine | Medium indirect light (a couple of metres from a window) | Water when the top 3 cm of soil dries, about weekly | Mildly toxic to pets |
| Blue Hosta 'Halcyon' | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, about every 5-7 days | Toxic to pets |
| Blue Mouse Ears Hosta | Low light (north window or shaded room) | Keep soil consistently moist, watering when the top 2-3 cm begins to dry, often weekly or more in summer | Toxic to pets |
| Blue Ridge Creeping Phlox | Medium indirect light (a couple of metres from a window) | Weekly in the first season; every 1–2 weeks once established | Pet-safe |
| Blue Spurflower | Medium indirect light (a couple of metres from a window) | Moderate — water once or twice weekly in summer; reduce significantly in winter | Mildly toxic to pets |
| Blunt-Leaf Wax Plant | Medium indirect light (a couple of metres from a window) | Every 7–14 days in growing season; reduce significantly in winter | Pet-safe |
| Blushing Arisaema | Medium indirect light (a couple of metres from a window) | Regularly during growing season; minimal in dormancy | Toxic to pets |
| Boea Hygroscopica | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days | Mildly toxic to pets |
| Bog Arum | Medium indirect light (a couple of metres from a window) | Saturated soil or up to 15 cm of standing water | Toxic to pets |
| Boivin's Aponogeton | Medium indirect light (a couple of metres from a window) | Permanently submerged; weekly 25% water changes | Pet-safe |
| Bolbitis heudelotii | Medium indirect light (a couple of metres from a window) | Permanently submerged; 30-50% water change weekly | Mildly toxic to pets |
| Bolivian Sunset | Medium indirect light (a couple of metres from a window) | Every 4–5 days in growth; reduce in dormancy | Mildly toxic to pets |
| Boston fern | Medium indirect light (a couple of metres from a window) | When the top 1 cm of soil is just dry, every 3-5 days | Pet-safe |
| Boston Fern | Medium indirect light (a couple of metres from a window) | Every 3–4 days in spring and summer; every 5–7 days in winter | Pet-safe |
| Bottle Gentian | Medium indirect light (a couple of metres from a window) | Regular — keep soil consistently moist | Pet-safe |
| Brade's Begonia | Medium indirect light (a couple of metres from a window) | When the top 1–2 cm of soil feels dry | Toxic to pets |
| Bradley's Spleenwort | Medium indirect light (a couple of metres from a window) | When the top 1–2 cm of substrate dries out | Pet-safe |
| Braun's Holly Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days; keep evenly moist | Pet-safe |
| Braun's Holly Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days; maintain consistently moist but well-drained soil | Pet-safe |
| Brazilian Tree Fern | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season, once a week in winter | Pet-safe |
| Bressingham White Bergenia | Medium indirect light (a couple of metres from a window) | Every 7–10 days during the growing season; reduce in autumn and winter | Pet-safe |
| Brigham's Specklinia | Medium indirect light (a couple of metres from a window) | Every 1–2 days; allow medium to barely dry between waterings | Pet-safe |
| Brilliantelse Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days; never allow to fully dry out | Pet-safe |
| Bristle-Leaf Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days (allow top half of soil to dry) | Pet-safe |
| Bristly Lepanthes | Medium indirect light (a couple of metres from a window) | Daily or every 2 days; medium kept consistently moist | Pet-safe |
| Britt-Marie Crawford Ligularia | Medium indirect light (a couple of metres from a window) | Constantly moist to wet; never allow to dry out — water generously in any dry spell, sometimes daily in heat | Mildly toxic to pets |
| Brittle Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–3 days in warm months; every 4–5 days in winter | Pet-safe |
| Broad Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 3–4 days in the growing season; every 5–7 days in winter | Pet-safe |
| Broad-leaved Anubias | Low light (north window or shaded room) | Aquatic or emersed; submersed specimens require stable aquarium water; emersed plants need consistently moist conditions | Mildly toxic to pets |
| Broad-leaved Helleborine | Medium indirect light (a couple of metres from a window) | Regular during dry spells; keep consistently moist but not waterlogged | Mildly toxic to pets |
| Broad-Leaved Primrose | Medium indirect light (a couple of metres from a window) | Regularly throughout the growing season; reduced in winter | Toxic to pets |
| Broadleaf Bamboo | Medium indirect light (a couple of metres from a window) | 2–3 times per week in summer, once per week in winter | Pet-safe |
| Browning Coelogyne | Medium indirect light (a couple of metres from a window) | Evenly moist in the growing season (mid-spring to early autumn); water every 3–4 weeks in winter rest | Pet-safe |
| Brunnera macrophylla | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7 days | Mildly toxic to pets |
| Brunnera macrophylla 'Jack Frost' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Mildly toxic to pets |
| Brunnera macrophylla 'Looking Glass' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Mildly toxic to pets |
| Bucephalandra 'Brownie Ghost' | Low light (north window or shaded room) | Continuously submerged; 20-30% aquarium water change weekly | Toxic to pets |
| Bucephalandra Black Pearl | Low light (north window or shaded room) | Kept permanently wet or submerged; mist daily if emersed | Toxic to pets |
| Bucephalandra Brownie Miami | Medium indirect light (a couple of metres from a window) | Kept submerged in an aquarium, or rhizome misted daily in an emersed setup | Toxic to pets |
| Bucephalandra Catherineae | Low light (north window or shaded room) | Keep the rhizome and roots constantly moist; mist emersed plants daily or run a sealed terrarium | Mildly toxic to pets |
| Bucephalandra Kedagang | Medium indirect light (a couple of metres from a window) | Kept submerged in an aquarium, or rhizome misted daily in an emersed setup | Toxic to pets |
| Bucephalandra Motleyana | Low light (north window or shaded room) | Keep roots and rhizome continuously moist; mist daily when emersed or grow submerged | Mildly toxic to pets |
| Bucephalandra Sekadau | Low light (north window or shaded room) | Kept constantly wet or submerged; mist daily if emersed | Toxic to pets |
| Bucephalandra Theia Green | Medium indirect light (a couple of metres from a window) | Kept submerged in an aquarium, or rhizome misted daily in an emersed setup | Toxic to pets |
| Bucephalandra Wavy Green | Low light (north window or shaded room) | Kept constantly wet or submerged; mist daily if grown emersed | Toxic to pets |
| Buchholtz's Billbergia | Medium indirect light (a couple of metres from a window) | Every 2–3 weeks (soil); cup refreshed every 3–4 weeks | Pet-safe |
| Bugle | Medium indirect light (a couple of metres from a window) | Moderate; keep evenly moist but never waterlogged | Pet-safe |
| Bulbophyllum barbigerum | Medium indirect light (a couple of metres from a window) | Every 2-4 days; keep evenly moist | Pet-safe |
| Bulbophyllum Elizabeth Ann | Medium indirect light (a couple of metres from a window) | Every 2-4 days; keep consistently moist | Pet-safe |
| Bulbous Corydalis | Medium indirect light (a couple of metres from a window) | Rely on natural rainfall during spring growth; no irrigation needed once dormant in summer | Toxic to pets |
| Bullate Nautilocalyx | Medium indirect light (a couple of metres from a window) | Every 2–4 days in the growing season; reduce to once weekly in autumn–winter | Pet-safe |
| Bullate Sinningia | Medium indirect light (a couple of metres from a window) | When top 2 cm of compost feels dry | Pet-safe |
| Burgundy Glow Bugle | Medium indirect light (a couple of metres from a window) | Moderate; consistently moist but not waterlogged | Mildly toxic to pets |
| Burgundy Lace Japanese Painted Fern | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season, reduce significantly in winter dormancy | Pet-safe |
| Burgundy Periwinkle | Medium indirect light (a couple of metres from a window) | Weekly during establishment; every 2–3 weeks once established | Toxic to pets |
| Burrawang | Medium indirect light (a couple of metres from a window) | Water every 2–3 weeks in growing season, monthly or less in winter | Toxic to pets |
| Bushgrass | Medium indirect light (a couple of metres from a window) | Moderate — water regularly to establish, then largely drought-tolerant | Pet-safe |
| Butterfield Holly Fern | Low light (north window or shaded room) | Every 7–14 days; much less in winter | Pet-safe |
| Button fern | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, every 7-10 days | Pet-safe |
| Byfield Fern Cycad | Medium indirect light (a couple of metres from a window) | Every 1–2 weeks | Toxic to pets |
| Caladium Candidum | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil begins to dry, roughly every 4-6 days in active growth | Toxic to pets |
| Caladium Moonlight | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil begins to dry, roughly every 4-6 days in active growth | Toxic to pets |
| Caladium White Christmas | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil begins to dry, roughly every 4-6 days in active growth | Toxic to pets |
| Calanthe sylvatica | Medium indirect light (a couple of metres from a window) | Keep evenly moist in growth, watering when the top 2-3 cm of mix feels dry, roughly every 4-6 days | Mildly toxic to pets |
| Calanthe triplicata | Medium indirect light (a couple of metres from a window) | Keep evenly moist year-round; water when the surface begins to dry | Pet-safe |
| Calathea | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is just dry, every 4-7 days | Pet-safe |
| Calathea 'Flamestar' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil dries, roughly every 5-7 days in growth | Pet-safe |
| Calathea 'Vittata' Stripe Star | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil dries, roughly every 5-7 days in growth | Pet-safe |
| Calathea Bachemiana | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Bacillaris | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil starts to dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Binotii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Burle-Marxii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Concinna | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Cylindrica | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Dottie | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Calathea Ecuatoriana | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Exotica | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Fasciata (Round-leaf Calathea) | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Leopardina | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Leopardina Splash | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just drying, roughly every 5-7 days in growth | Pet-safe |
| Calathea Louisae | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Louisae 'Maui Queen' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Louisae 'Thai Beauty' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Majestica Royal Blue | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Misto | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Calathea Orbifolia Silver | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Ornata Dark Pink | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Picturata 'Argentea' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Picturata 'Vandenheckei' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Propinqua | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is drying, roughly every 5-7 days in growth | Pet-safe |
| Calathea Roseopicta 'Corona' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Calathea Roseopicta 'Cynthia' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Roseopicta 'Princess Jessie' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Roseopicta 'Rosy' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-7 days | Pet-safe |
| Calathea Rufibarba Blue Grass | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil starts to dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Tropic Snow | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea Undulata | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil starts to dry, roughly every 5-7 days in growth | Pet-safe |
| Calathea Undulata 'Wavestar' | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil dries, roughly every 5-7 days in growth | Pet-safe |
| Calathea Warscewiczii Velvet Touch | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Calathea White Star | Medium indirect light (a couple of metres from a window) | Water when the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Calathea Wiotii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil dries, about every 5-7 days while actively growing | Pet-safe |
| Calathea Zebrina Starter | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just drying, roughly every 5-7 days in growth | Pet-safe |
| Calico flower | Medium indirect light (a couple of metres from a window) | Once or twice a week during the growing season; once a week or less in winter. | Toxic to pets |
| California Fawn Lily | Medium indirect light (a couple of metres from a window) | Regular in spring growing season; minimal during summer dormancy | Mildly toxic to pets |
| California Giant Chain Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days; keep soil consistently moist but not waterlogged | Pet-safe |
| California Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days in the growing season; every 7–10 days in winter (dormant period) | Pet-safe |
| California Nutmeg | Medium indirect light (a couple of metres from a window) | Every 7–10 days; do not allow to dry out fully, especially when young | Mildly toxic to pets |
| California Polypody | Medium indirect light (a couple of metres from a window) | Weekly in autumn to spring; reduce to monthly or suspend in summer | Mildly toxic to pets |
| California Shield Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; reduce in winter | Pet-safe |
| Callus Slipper Orchid | Medium indirect light (a couple of metres from a window) | When the top of the mix begins to dry, roughly every 5-7 days | Pet-safe |
| Cambodian Sonerila | Medium indirect light (a couple of metres from a window) | Every 4–7 days; keep medium consistently moist | Pet-safe |
| Camille Dumb Cane | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14 days in winter | Toxic to pets |
| Canada Mayflower | Low light (north window or shaded room) | 2–3 times per week during the growing season; minimal in dormancy | Mildly toxic to pets |
| Canada Violet | Medium indirect light (a couple of metres from a window) | Weekly; more frequently in warm or dry periods | Mildly toxic to pets |
| Canadian Lousewort | Medium indirect light (a couple of metres from a window) | Regularly; keep soil evenly moist | Mildly toxic to pets |
| Canadian Waterweed | Medium indirect light (a couple of metres from a window) | Permanently submerged | Pet-safe |
| Canadian Wild Ginger | Low light (north window or shaded room) | Water weekly, or when the top 2–3 cm of soil feels dry | Mildly toxic to pets |
| Canadian Yew | Low light (north window or shaded room) | Weekly during establishment; every 1–2 weeks once established | Toxic to pets |
| Canna-leaved Peace Lily | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14 days in winter | Toxic to pets |
| Carex pendula | Medium indirect light (a couple of metres from a window) | Keep soil moist; water in dry spells | Mildly toxic to pets |
| Carolina Spring Beauty | Medium indirect light (a couple of metres from a window) | Moderate during active spring growth; essentially none during summer–winter dormancy. | Pet-safe |
| Cast iron plant | Low light (north window or shaded room) | When the top 3 cm of soil is dry, every 10-14 days | Pet-safe |
| Catesby's Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist in spring; reduce after summer dormancy | Mildly toxic to pets |
| Cathedral Begonia | Medium indirect light (a couple of metres from a window) | When the top 2 cm of compost feels dry, every 5-7 days in the growing season | Toxic to pets |
| Catlin's Giant Bugle | Medium indirect light (a couple of metres from a window) | Once or twice weekly during establishment; once weekly once established | Mildly toxic to pets |
| Caucasian Comfrey | Medium indirect light (a couple of metres from a window) | Every 5–7 days during dry spells; self-sufficient in rainy climates | Mildly toxic to pets |
| Cedar Sage | Medium indirect light (a couple of metres from a window) | Moderate; water when top 5 cm of soil is dry | Pet-safe |
| Celandine Poppy | Medium indirect light (a couple of metres from a window) | 2 times per week during spring and early summer; reduce as plant self-senesces | Mildly toxic to pets |
| Cephalotaxus 'Fastigiata' | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly weekly while establishing | Mildly toxic to pets |
| Ceratophyllum demersum | Medium indirect light (a couple of metres from a window) | Permanently submerged; 25-40% water change weekly | Mildly toxic to pets |
| Ceratopteris cornuta | Medium indirect light (a couple of metres from a window) | Permanently submerged/floating; 25-40% water change weekly | Mildly toxic to pets |
| Ceratopteris thalictroides | Medium indirect light (a couple of metres from a window) | Permanently submerged; 25-40% water change weekly | Mildly toxic to pets |
| Chain Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 4-6 days | Mildly toxic to pets |
| Chamaedorea Hooperiana | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Chamaedorea Microspadix | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Chamaeranthemum gaudichaudii | Medium indirect light (a couple of metres from a window) | Keep consistently moist, watering when the surface just begins to dry, about every 4-6 days | Mildly toxic to pets |
| Chamaeranthemum venosum | Medium indirect light (a couple of metres from a window) | Keep evenly moist, watering as the surface starts to dry, about every 4-6 days | Mildly toxic to pets |
| Chaparensis Masdevallia | Medium indirect light (a couple of metres from a window) | Daily in hot weather; every 2–3 days in cooler seasons | Pet-safe |
| Cheerful Dancing Ginger | Medium indirect light (a couple of metres from a window) | 2–3 times per week in the growing season; minimal during dormancy | Mildly toxic to pets |
| Chestnut-Flowered Sage | Medium indirect light (a couple of metres from a window) | Regular — keep soil evenly moist through the growing season | Mildly toxic to pets |
| Chiapas Arrowhead Plant | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14 days in winter | Toxic to pets |
| Chiapas Sage | Medium indirect light (a couple of metres from a window) | Moderate — water when the top 2 cm of soil is dry | Pet-safe |
| Chimera Dragon Orchid | Medium indirect light (a couple of metres from a window) | Continuously moist; water every 1–2 days; never allow to dry out | Pet-safe |
| Chinese astilbe | Medium indirect light (a couple of metres from a window) | Once or twice per week; more in hot weather | Pet-safe |
| Chinese Dwarf Bamboo | Medium indirect light (a couple of metres from a window) | Once or twice per week during the growing season; reduce in winter | Pet-safe |
| Chinese evergreen | Low light (north window or shaded room) | When the top 3 cm of soil is dry, every 7-10 days | Toxic to pets |
| Chinese Holly Fern | Low light (north window or shaded room) | Every 6–10 days in summer, every 12–16 days in winter | Pet-safe |
| Chinese Plum Yew | Medium indirect light (a couple of metres from a window) | Keep evenly moist; weekly in dry spells, more while establishing | Mildly toxic to pets |
| Chinese Wild Ginger | Low light (north window or shaded room) | Water every 5–7 days, or when the top 2 cm of soil begins to dry | Mildly toxic to pets |
| Chinese woodbine | Medium indirect light (a couple of metres from a window) | Weekly; do not allow the root zone to dry out | Mildly toxic to pets |
| Chinese Yew | Medium indirect light (a couple of metres from a window) | Weekly during establishment; every 1–2 weeks once established | Toxic to pets |
| Chocolate Chip Bugle | Medium indirect light (a couple of metres from a window) | Once or twice weekly until established; once weekly thereafter | Mildly toxic to pets |
| Christmas Fern | Low light (north window or shaded room) | When the top 3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Christmas Rose | Medium indirect light (a couple of metres from a window) | Keep evenly moist while establishing and during summer drought; established plants tolerate moderate dryness | Toxic to pets |
| Cilician Winter Aconite | Medium indirect light (a couple of metres from a window) | Moist during late winter and spring growth; dry to moderate when dormant | Toxic to pets |
| Cinnamon Fern | Medium indirect light (a couple of metres from a window) | 2-3 times per week; keep consistently moist | Pet-safe |
| Cinnamon Fern | Low light (north window or shaded room) | Keep consistently moist to wet; water whenever the surface begins to dry, often every 3-5 days | Mildly toxic to pets |
| Cissus rhombifolia 'Ellen Danica' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Clamshell Orchid | Medium indirect light (a couple of metres from a window) | Every 5–7 days; allow the mix to almost dry before rewetting | Pet-safe |
| Cleopatra flame violet | Medium indirect light (a couple of metres from a window) | When the surface of the soil begins to dry — roughly every 5–7 days in warm conditions. | Pet-safe |
| Cliff Holly Fern | Low light (north window or shaded room) | Every 7–14 days; allow top half of soil to dry between waterings | Pet-safe |
| Climbing Fetterbush | Medium indirect light (a couple of metres from a window) | Frequent; keep consistently moist to wet | Toxic to pets |
| Climbing Hydrangea | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply weekly in the first 2-3 years and during dry spells | Toxic to pets |
| Clinton's Wood Fern | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water weekly in dry periods | Mildly toxic to pets |
| Clivia 'Belgian Hybrid' | Medium indirect light (a couple of metres from a window) | Water when the top few cm are dry in growth; keep nearly dry through the winter rest | Toxic to pets |
| Cloth of Gold Saxifrage | Medium indirect light (a couple of metres from a window) | Every 5–7 days; reduce in winter | Pet-safe |
| Clouds of Perfume Woodland Phlox | Medium indirect light (a couple of metres from a window) | Weekly during the growing season; do not allow soil to dry out in summer | Pet-safe |
| Cluster-Headed Mezobromelia | Medium indirect light (a couple of metres from a window) | Keep central tank filled; water substrate when top inch is dry, approximately every 7-10 days | Pet-safe |
| Clustered Sanicle | Low light (north window or shaded room) | Every 1–2 weeks; maintain consistent moisture, never waterlogged | Mildly toxic to pets |
| Coastal Doghobble | Medium indirect light (a couple of metres from a window) | Every 5–7 days; regular deep watering essential in dry periods | Toxic to pets |
| Coastal Leucothoe | Medium indirect light (a couple of metres from a window) | Regular; keep evenly moist | Toxic to pets |
| Cobra Bird's Nest Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Cobra Lily | Low light (north window or shaded room) | Keep evenly moist through the spring-to-summer growing season, watering when the surface begins to dry; reduce as the plant dies back to dormancy. | Toxic to pets |
| Cochinchina Lady Palm | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; every 10–14 days in winter | Pet-safe |
| Coconut-Scented Bulbophyllum | Medium indirect light (a couple of metres from a window) | Every 3–4 days during growth; every 6–10 days in winter | Pet-safe |
| Cole's Prostrate Hemlock | Medium indirect light (a couple of metres from a window) | Every 1–2 weeks; do not allow soil to dry out | Pet-safe |
| Columbine | Medium indirect light (a couple of metres from a window) | Moderate; water during dry spells | Toxic to pets |
| Common Bistort | Medium indirect light (a couple of metres from a window) | Frequently — keep soil consistently moist | Mildly toxic to pets |
| Common blue violet | Medium indirect light (a couple of metres from a window) | Every 5–10 days; tolerates wet soil | Pet-safe |
| Common box | Medium indirect light (a couple of metres from a window) | Weekly during establishment; monthly once established in the ground | Toxic to pets |
| Common Bugle | Medium indirect light (a couple of metres from a window) | Moderate; consistent moisture preferred | Mildly toxic to pets |
| Common Cow-wheat | Medium indirect light (a couple of metres from a window) | Moderate; keep soil evenly moist but never waterlogged | Mildly toxic to pets |
| Common Dog Violet | Medium indirect light (a couple of metres from a window) | Water occasionally; keep soil consistently moist but not waterlogged. | Pet-safe |
| Common Foxglove | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water weekly in dry spells | Toxic to pets |
| Common Hepatica | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; reduce in summer dormancy | Mildly toxic to pets |
| Common Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–4 days; keep soil evenly moist | Pet-safe |
| Common Polypody | Medium indirect light (a couple of metres from a window) | Every 10–14 days; tolerates extended dry periods once established | Pet-safe |
| Common Snowdrop | Medium indirect light (a couple of metres from a window) | Naturally moisture-retentive soil; supplemental watering in dry spells during growth | Toxic to pets |
| Common Water Starwort | Medium indirect light (a couple of metres from a window) | Permanently submerged or marginal | Pet-safe |
| Common Water Starwort | Medium indirect light (a couple of metres from a window) | Fully submerged or surface-floating — permanent aquatic | Mildly toxic to pets |
| Commutatum Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; every 10–14 days in winter | Pet-safe |
| Compact Dumb Cane | Medium indirect light (a couple of metres from a window) | Every 7–10 days in summer; every 14 days in winter | Toxic to pets |
| Compressed Peperomia | Medium indirect light (a couple of metres from a window) | Every 2–3 weeks (allow compost to dry substantially between waterings) | Pet-safe |
| Constricted Masdevallia | Medium indirect light (a couple of metres from a window) | Daily in summer heat; every 2–3 days in cooler months | Pet-safe |
| Copper Angel Masdevallia | Medium indirect light (a couple of metres from a window) | 2–3 times per week; keep substrate slightly moist | Pet-safe |
| Coral bells | Medium indirect light (a couple of metres from a window) | Weekly during active growth; reduce in autumn and winter | Pet-safe |
| Coral Bells 'Caramel' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, around weekly in growth; more in heat and for containers | Pet-safe |
| Coral Bells 'Obsidian' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly in growth; more in heat and for container plants | Pet-safe |
| Coral Bells 'Palace Purple' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly in growth; more in heat and for container plants | Pet-safe |
| Corn plant | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, every 10-14 days | Toxic to pets |
| Corn-Leaf Pitcairnia | Medium indirect light (a couple of metres from a window) | every 5–7 days in summer, every 10–14 days in winter | Pet-safe |
| Cow Parsley | Medium indirect light (a couple of metres from a window) | Moderate; water during dry spells in the first season | Mildly toxic to pets |
| Cowslip | Medium indirect light (a couple of metres from a window) | Twice weekly in active growth, reduce to once weekly when dormant in summer | Toxic to pets |
| Creeping Begonia | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of compost feels dry, every 5-8 days in active growth | Toxic to pets |
| Creeping broad-leaf sedge | Medium indirect light (a couple of metres from a window) | Keep evenly and consistently moist; never allow to dry out | Pet-safe |
| Creeping Coin Peperomia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14–21 days in winter | Pet-safe |
| Creeping Comfrey | Low light (north window or shaded room) | Every 7–14 days; largely self-sufficient once established | Mildly toxic to pets |
| Creeping Elatostema | Low light (north window or shaded room) | Water freely in active growth (spring–autumn); moderately in winter | Pet-safe |
| Creeping Gaultheria | Medium indirect light (a couple of metres from a window) | Regularly; soil must not dry out | Toxic to pets |
| Creeping snowberry | Medium indirect light (a couple of metres from a window) | Regular; keep moist | Mildly toxic to pets |
| Creeping Woodland Phlox | Medium indirect light (a couple of metres from a window) | Weekly; maintain consistent moisture | Mildly toxic to pets |
| Crescent-Leaved Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 3–4 days during active growth; reduce to every 5–6 days in winter | Pet-safe |
| Crested Bracken | Medium indirect light (a couple of metres from a window) | every 1-2 weeks once established | Toxic to pets |
| Crested Buckler Fern | Medium indirect light (a couple of metres from a window) | Keep consistently moist; suitable for permanently damp or boggy sites | Mildly toxic to pets |
| Crested Christmas Fern | Low light (north window or shaded room) | Every 7–10 days; allow top 2–3 cm to dry between waterings | Pet-safe |
| Crested Hart's Tongue Fern | Medium indirect light (a couple of metres from a window) | Weekly in the growing season, every 2–3 weeks in winter | Pet-safe |
| Crested Iris | Medium indirect light (a couple of metres from a window) | Moderate — keep evenly moist | Toxic to pets |
| Crested Wood Fern | Medium indirect light (a couple of metres from a window) | Keep soil constantly moist; check every 3-5 days | Mildly toxic to pets |
| Cretan Brake Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days in summer; every 7 days in winter | Pet-safe |
| Crispum Hart's Tongue Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days; keep evenly moist | Pet-safe |
| Crispy Wave 'Hurricane' | Medium indirect light (a couple of metres from a window) | Water when the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Crispy Wave Fern | Medium indirect light (a couple of metres from a window) | Every 7–10 days; allow top 2–3 cm of soil to dry first | Pet-safe |
| Crispy Wave Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Crocodile fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, every 4-7 days | Pet-safe |
| Crosswort | Medium indirect light (a couple of metres from a window) | Low to moderate — rainfall sufficient in UK | Mildly toxic to pets |
| Crown Fern | Medium indirect light (a couple of metres from a window) | 2-3 times per week in growing season; reduce in winter | Pet-safe |
| Cryptocoryne albida | Low light (north window or shaded room) | Fully submerged; 30-50% aquarium water change weekly | Mildly toxic to pets |
| Cryptocoryne balansae | Medium indirect light (a couple of metres from a window) | Continuously submerged; 25-50% water change weekly | Mildly toxic to pets |
| Cryptocoryne beckettii | Low light (north window or shaded room) | Continuously submerged; 25-50% water change weekly | Mildly toxic to pets |
| Cryptocoryne crispatula var. balansae | Medium indirect light (a couple of metres from a window) | Permanently submerged; 25-30% weekly water change | Mildly toxic to pets |
| Cryptocoryne lucens | Medium indirect light (a couple of metres from a window) | Continuously submerged; 25-50% water change weekly | Mildly toxic to pets |
| Cryptocoryne nurii | Low light (north window or shaded room) | Submerged: keep continuously immersed; 25-30% weekly water changes. Emersed: keep substrate constantly moist, never drying out | Toxic to pets |
| Cryptocoryne parva | Medium indirect light (a couple of metres from a window) | Continuously submerged; 25-50% water change weekly | Mildly toxic to pets |
| Cryptocoryne pontederiifolia | Low light (north window or shaded room) | Permanently submerged; 25-30% weekly water change | Mildly toxic to pets |
| Cryptocoryne spiralis | Medium indirect light (a couple of metres from a window) | Continuously submerged; 25-50% water change weekly | Mildly toxic to pets |
| Cryptocoryne undulata | Low light (north window or shaded room) | Continuously submerged; 25-50% water change weekly | Mildly toxic to pets |
| Cryptocoryne wendtii 'Brown' | Low light (north window or shaded room) | Continuously submerged; 25-50% water change weekly | Mildly toxic to pets |
| Cryptocoryne wendtii 'Green' | Low light (north window or shaded room) | Submerged full-time; change 20-30% of tank water weekly | Mildly toxic to pets |
| Cryptocoryne wendtii 'Red' | Medium indirect light (a couple of metres from a window) | Continuously submerged; 25-50% water change weekly | Mildly toxic to pets |
| Cuckooflower | Medium indirect light (a couple of metres from a window) | Moderate to high — keep moist at all times | Mildly toxic to pets |
| Curly Begonia | Medium indirect light (a couple of metres from a window) | When the top of the sphagnum moss begins to lose moisture | Toxic to pets |
| Curly Kentia Palm | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Cutleaf Toothwort | Medium indirect light (a couple of metres from a window) | Moderate during the active growth period (March–May); none needed once dormant in summer. | Pet-safe |
| Cyperus-Like Sedge | Medium indirect light (a couple of metres from a window) | Permanent moisture; plant in standing water up to 15 cm deep | Pet-safe |
| Cyrtomium macrophyllum | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Cystopteris bulbifera | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water when the surface begins to dry, roughly every 3-6 days in growth | Mildly toxic to pets |
| Cystopteris fragilis | Medium indirect light (a couple of metres from a window) | Keep evenly moist while in growth, watering when the top 1-2 cm of soil dries, roughly every 4-7 days | Mildly toxic to pets |
| Dalstroem's Dragon Orchid | Medium indirect light (a couple of metres from a window) | Daily misting or watering; roots must remain continuously moist but never waterlogged | Pet-safe |
| Daphne laureola | Low light (north window or shaded room) | Weekly while establishing; rarely once established | Toxic to pets |
| dark form scindapsus | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growing season; every 10–14 days in winter | Toxic to pets |
| Dark Green Ceratozamia | Medium indirect light (a couple of metres from a window) | Weekly in summer; every 2–3 weeks in winter | Toxic to pets |
| Dark-purple Primulina | Medium indirect light (a couple of metres from a window) | When the top third of compost feels dry | Mildly toxic to pets |
| Densiformis Yew | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, roughly weekly while establishing | Toxic to pets |
| Deparia acrostichoides | Low light (north window or shaded room) | Keep evenly moist; water when the top 2 cm starts to dry, roughly every 4-7 days in growth | Pet-safe |
| Desdemona Ligularia | Medium indirect light (a couple of metres from a window) | Constantly moist to wet; never let it dry out — water generously in dry spells, sometimes daily in heat | Mildly toxic to pets |
| Desert Privet Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Deyke's Wax Plant | Medium indirect light (a couple of metres from a window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Diana Clare Pulmonaria | Low light (north window or shaded room) | Keep soil evenly moist; water every 4-6 days in dry spells, more in pots | Mildly toxic to pets |
| Diane's Gold Brunnera | Low light (north window or shaded room) | Keep soil evenly moist; water when the top 2-3 cm dries, roughly every 4-6 days in heat | Mildly toxic to pets |
| Dicentra formosa 'Luxuriant' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil begins to dry, roughly every 5-7 days | Toxic to pets |
| Dickie's Bladder Fern | Low light (north window or shaded room) | 2-3 times per week in the growing season; reduce in winter dormancy | Pet-safe |
| Didissandra uniflora | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of mix begins to dry, roughly every 4-7 days | Mildly toxic to pets |
| Dieffenbachia | Medium indirect light (a couple of metres from a window) | When the top 3 cm of soil is dry, every 7-10 days | Toxic to pets |
| Dieffenbachia Maculata Exotica | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, every 7-10 days | Toxic to pets |
| Dilys Cranesbill | Medium indirect light (a couple of metres from a window) | Water once a week during dry spells; largely self-sufficient once established in UK conditions | Pet-safe |
| Dimpled Trout Lily | Medium indirect light (a couple of metres from a window) | Consistently moist from emergence to dormancy (late winter to late spring) | Mildly toxic to pets |
| Divisilobum Soft Shield Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days; reduce in winter | Pet-safe |
| Dodson's Lepanthes | Medium indirect light (a couple of metres from a window) | Daily misting or every 1-2 days; never allow to dry out | Pet-safe |
| Dog's Tooth Violet | Medium indirect light (a couple of metres from a window) | Moderate during active growth; minimal when dormant | Mildly toxic to pets |
| Dogwood | Medium indirect light (a couple of metres from a window) | Low to moderate — water during establishment; drought-tolerant thereafter | Mildly toxic to pets |
| Dolce Blackcurrant Heuchera | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly | Pet-safe |
| Dotted Neoregelia | Medium indirect light (a couple of metres from a window) | Maintain water in the central cup; water the potting medium lightly and allow it to dry slightly | Pet-safe |
| Dotted Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Double Bloodroot | Medium indirect light (a couple of metres from a window) | Every 5–7 days during spring growth; withhold or greatly reduce during summer dormancy | Toxic to pets |
| Double-Flowered Bloodroot | Medium indirect light (a couple of metres from a window) | Moderate in spring; reduce as plant approaches dormancy in summer | Toxic to pets |
| Dove Masdevallia | Medium indirect light (a couple of metres from a window) | Daily or every 2 days; the root zone must remain continuously moist | Pet-safe |
| Downy Yellow Violet | Medium indirect light (a couple of metres from a window) | Regular; keep evenly moist | Pet-safe |
| Dracaena | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, every 10-14 days | Toxic to pets |
| Dracaena Braunii | Medium indirect light (a couple of metres from a window) | Soil: when top 2-3 cm is dry, every 7-10 days. Water culture: top up weekly, full change every 2-3 weeks | Toxic to pets |
| Dracaena Camerooniana | Low light (north window or shaded room) | When the top 2-3 cm of soil is dry, every 5-7 days | Toxic to pets |
| Dracaena Compacta | Medium indirect light (a couple of metres from a window) | When top 3-5 cm of soil is dry, roughly every 10-14 days | Toxic to pets |
| Dracaena Deremensis Green Stripe | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, every 7-10 days | Toxic to pets |
| Dracaena Deremensis Janet Craig | Low light (north window or shaded room) | When the top 3-5 cm of soil is dry, roughly every 10-14 days | Toxic to pets |
| Dracaena Deremensis Warneckii | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Dracaena Fragrans Massangeana | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Dracaena Hookeriana | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, every 10-14 days | Toxic to pets |
| Dracaena Thalioides | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Dracula bella | Low light (north window or shaded room) | Keep continuously moist, watering every 2-3 days so the medium never dries fully | Mildly toxic to pets |
| Dracula simia | Low light (north window or shaded room) | Keep continuously moist, watering every 2-3 days so the medium never dries out | Mildly toxic to pets |
| Dracula sodiroi | Low light (north window or shaded room) | Keep evenly moist at all times, watering about every 2-4 days; the medium should never fully dry | Mildly toxic to pets |
| Dracula vampira | Low light (north window or shaded room) | Keep the medium evenly moist at all times; water roughly every 2-4 days, never allowing it to dry out | Mildly toxic to pets |
| Dragon tree | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, every 10-14 days | Toxic to pets |
| Dragon-Head Bamboo | Medium indirect light (a couple of metres from a window) | Twice weekly during the growing season; weekly in cool, wet periods | Pet-safe |
| Dreaming Air Plant | Medium indirect light (a couple of metres from a window) | Mist 2–3 times per week; soak weekly | Pet-safe |
| Drooping Leucothoe | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; weekly in dry spells | Toxic to pets |
| Drooping Spleenwort | Medium indirect light (a couple of metres from a window) | Every 5–10 days; allow surface to approach dryness between waterings | Pet-safe |
| Drooping Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist throughout spring; can tolerate slightly drier conditions in summer dormancy. | Mildly toxic to pets |
| Drosera schizandra | Low light (north window or shaded room) | Keep media permanently moist but not waterlogged; mist or top-water with pure water frequently | Pet-safe |
| Drummond's Aster | Medium indirect light (a couple of metres from a window) | Low to moderate | Pet-safe |
| dryas primulina | Medium indirect light (a couple of metres from a window) | Every 7–10 days in spring–summer; every 14–21 days in winter | Pet-safe |
| Dryopteris affinis 'Cristata' | Low light (north window or shaded room) | Keep soil consistently moist; water deeply during dry spells, roughly weekly in summer | Pet-safe |
| Dryopteris carthusiana | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist, watering when the top 1-2 cm dries, roughly every 4-6 days | Mildly toxic to pets |
| Dryopteris championii | Low light (north window or shaded room) | Keep evenly moist; water deeply in dry spells, roughly weekly in summer heat | Pet-safe |
| Dryopteris dilatata | Medium indirect light (a couple of metres from a window) | Keep soil moist, watering when the top 2-3 cm dries, roughly every 5-7 days; established plants tolerate short dry spells | Mildly toxic to pets |
| Dryopteris dilatata 'Crispa Whiteside' | Medium indirect light (a couple of metres from a window) | Keep soil moist, watering when the top 2-3 cm dries, roughly every 5-7 days; established clumps tolerate brief dryness | Mildly toxic to pets |
| Dryopteris filix-mas 'Linearis Polydactyla' | Low light (north window or shaded room) | Keep soil consistently moist; water during dry spells so it never dries out | Mildly toxic to pets |
| Dryopteris goldiana | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Dryopteris intermedia | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist, watering when the top 2-3 cm dries, roughly every 5-7 days; established plants take brief dry spells | Mildly toxic to pets |
| Dryopteris ludoviciana | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 4-6 days | Pet-safe |
| Dryopteris tokyoensis | Low light (north window or shaded room) | Keep constantly moist to wet; never allow to dry out, watering as often as needed in summer | Pet-safe |
| Dryopteris uniformis | Low light (north window or shaded room) | Keep evenly moist; water deeply during dry spells, roughly weekly in summer | Pet-safe |
| Duclouxs Petrocosmea | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth; sparingly in winter | Pet-safe |
| Dutchman's Breeches | Medium indirect light (a couple of metres from a window) | Every 3-5 days in spring; none needed once dormant | Toxic to pets |
| Dwarf Anubias | Low light (north window or shaded room) | Permanently aquatic or emersed in high-humidity environments; stable water conditions maintained with regular partial water changes | Mildly toxic to pets |
| Dwarf Fernleaf Bamboo | Medium indirect light (a couple of metres from a window) | Once or twice per week during the growing season; reduce significantly in winter | Pet-safe |
| Dwarf Henckelia | Medium indirect light (a couple of metres from a window) | Once or twice a week in the growing season; reduce in winter | Pet-safe |
| Dwarf Horsetail | Medium indirect light (a couple of metres from a window) | Consistently wet; stand pot in water tray | Mildly toxic to pets |
| Dwarf Japanese Yew | Medium indirect light (a couple of metres from a window) | Moderate — drought-tolerant once established | Toxic to pets |
| Dwarf Kacip Fatimah | Low light (north window or shaded room) | Water when the top 1 cm of medium is drying; every 4–6 days in warm conditions, less frequently in cooler or lower-light conditions | Mildly toxic to pets |
| Dwarf Remusatia | Medium indirect light (a couple of metres from a window) | Every 5–7 days during active growth; reduce significantly during dormancy | Toxic to pets |
| Dwarf Shell Ginger | Medium indirect light (a couple of metres from a window) | Regularly during the growing season; reduce in winter | Mildly toxic to pets |
| Dwarf Solomon's Seal | Medium indirect light (a couple of metres from a window) | Every 5–7 days during active growth; less when dormant | Mildly toxic to pets |
| Dwarf Sweet Flag | Medium indirect light (a couple of metres from a window) | Permanently moist to wet; tolerate shallow submersion | Pet-safe |
| Dwarf Trillium | Low light (north window or shaded room) | Keep soil consistently moist from spring emergence until dormancy; minimal watering once dormant | Mildly toxic to pets |
| Dwarf Water Clover | Medium indirect light (a couple of metres from a window) | Permanently submerged or in saturated substrate | Mildly toxic to pets |
| Dyer's Air Plant | Medium indirect light (a couple of metres from a window) | Daily misting plus weekly soak | Pet-safe |
| Early Purple Orchid | Medium indirect light (a couple of metres from a window) | Moist in spring; reduce significantly once summer dormancy begins | Mildly toxic to pets |
| Eastern Cyclamen | Medium indirect light (a couple of metres from a window) | Minimal in summer dormancy; rely on rainfall during autumn–spring growth | Toxic to pets |
| Eastern Hemlock | Medium indirect light (a couple of metres from a window) | Weekly during establishment; regular moisture required long-term | Pet-safe |
| Eastern Red Columbine | Medium indirect light (a couple of metres from a window) | Water when the top 3-5 cm of soil dries, roughly weekly | Mildly toxic to pets |
| Eastern Skunk Cabbage | Low light (north window or shaded room) | Continuously waterlogged; tolerates standing water | Toxic to pets |
| Echidna Orchid | Medium indirect light (a couple of metres from a window) | Daily misting if mounted; every 1–2 days if potted | Pet-safe |
| Echinodorus 'Ozelot' | Medium indirect light (a couple of metres from a window) | Permanently submerged; 25-30% weekly water change | Mildly toxic to pets |
| Echinodorus 'Vesuvius' | Medium indirect light (a couple of metres from a window) | Submerged aquatic; keep continuously underwater with a 25-30% water change weekly | Mildly toxic to pets |
| Echinodorus bleheri | Medium indirect light (a couple of metres from a window) | Permanently submerged; 25-30% weekly water change | Mildly toxic to pets |
| Echinodorus cordifolius | Medium indirect light (a couple of metres from a window) | Submerged to emersed; 25-30% weekly water change | Mildly toxic to pets |
| Echinodorus grisebachii 'Bleherae' | Medium indirect light (a couple of metres from a window) | Permanently submerged; 25-30% weekly water change | Mildly toxic to pets |
| Echinodorus uruguayensis | Medium indirect light (a couple of metres from a window) | Submerged aquatic; keep continuously underwater with a 25-30% water change weekly | Mildly toxic to pets |
| Elegant Peacock Ginger | Medium indirect light (a couple of metres from a window) | Weekly during growing season; cease in winter dormancy | Pet-safe |
| Elephant Ears Bergenia | Medium indirect light (a couple of metres from a window) | Every 7–14 days in summer; reduce to once a month or less in winter | Pet-safe |
| Emei Mountain Begonia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth; reduce significantly in winter dormancy | Toxic to pets |
| Emerald Spike Moss | Medium indirect light (a couple of metres from a window) | Keep the soil consistently, evenly moist — never let it dry out | Pet-safe |
| Empire Scarlet Star | Medium indirect light (a couple of metres from a window) | Keep the central urn filled; water the medium every 1–2 weeks | Pet-safe |
| Empress Wu Hosta | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 4-6 days in growth | Toxic to pets |
| English Bluebell | Medium indirect light (a couple of metres from a window) | Moderate; naturally moist in spring, drier in summer | Toxic to pets |
| Equal-Wing Begonia | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil becomes dry | Toxic to pets |
| Escobar's Lepanthes | Medium indirect light (a couple of metres from a window) | Daily or every 2 days; keep medium consistently moist | Pet-safe |
| European Chain Fern | Medium indirect light (a couple of metres from a window) | 3-4 times per week in growing season; reduce slightly in winter | Mildly toxic to pets |
| European Columbine | Medium indirect light (a couple of metres from a window) | Water when the top 3 cm of soil dries, roughly weekly | Mildly toxic to pets |
| European Wild Ginger | Low light (north window or shaded room) | Moderate; water when the top 3–4 cm of soil dries out | Toxic to pets |
| Eveline's Wax Plant | Medium indirect light (a couple of metres from a window) | Every 7–10 days in summer, every 2–3 weeks in winter | Pet-safe |
| Evergold Japanese Sedge | Medium indirect light (a couple of metres from a window) | Every 5-7 days or when the top 2 cm of soil is dry | Pet-safe |
| Exquisite Masdevallia | Medium indirect light (a couple of metres from a window) | Every 1–3 days depending on season and medium; do not allow to dry | Pet-safe |
| Eyelash Begonia | Medium indirect light (a couple of metres from a window) | When the top 1–2 cm of soil is dry | Toxic to pets |
| False Solomon's Seal | Medium indirect light (a couple of metres from a window) | 2–3 times per week in the growing season; reduce in dormancy | Mildly toxic to pets |
| Fanal astilbe | Medium indirect light (a couple of metres from a window) | 2–3 times per week in summer; weekly in cool or wet seasons | Pet-safe |
| Fastigiata Yew | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, about weekly while establishing | Toxic to pets |
| Few-flowered Lysionotus | Medium indirect light (a couple of metres from a window) | Once or twice a week in the growing season; once a week or less in winter | Pet-safe |
| Filmy Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–3 days in summer, every 4–5 days in winter | Pet-safe |
| Fingered Sedge | Low light (north window or shaded room) | Moderate; keep moist but not waterlogged | Pet-safe |
| Fire Alarm Heuchera | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about weekly | Pet-safe |
| Fire and Ice Hosta | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Toxic to pets |
| Fireflush Rex Begonia | Medium indirect light (a couple of metres from a window) | Every 7–12 days; bottom-water preferred | Toxic to pets |
| Fishbone Fern | Medium indirect light (a couple of metres from a window) | Water when the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Fishtail Holly Fern | Low light (north window or shaded room) | Every 7–10 days; less in winter | Pet-safe |
| Fishtail Parlour Palm | Low light (north window or shaded room) | Every 7–10 days in spring and summer; every 14–21 days in autumn and winter | Pet-safe |
| Fishtail Sword Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days in warm weather; every 6–8 days in cooler months | Pet-safe |
| Fittonia | Medium indirect light (a couple of metres from a window) | When the top 1 cm of soil is dry, every 3-5 days | Pet-safe |
| Fittonia 'Frankie' | Medium indirect light (a couple of metres from a window) | When the top 1 cm of soil begins to dry, roughly every 3-5 days | Pet-safe |
| Fittonia 'White Anne' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to dry, typically every 4-7 days | Pet-safe |
| Fittonia albivenis 'Pink Angel' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to dry, often every 4-7 days | Pet-safe |
| Fittonia albivenis 'Purple Vein' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil just starts to dry, often every 3-5 days | Pet-safe |
| Fittonia albivenis 'Skeleton' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil just begins to dry, often every 3-5 days | Pet-safe |
| Five Fingers Arrowhead Vine | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth; every 10–14 days in winter | Toxic to pets |
| Five-leaf akebia | Medium indirect light (a couple of metres from a window) | Once a week when establishing; drought-tolerant once mature | Mildly toxic to pets |
| Floating Aponogeton | Medium indirect light (a couple of metres from a window) | Permanently submerged bulb with floating leaves; fortnightly 20–25% water changes | Pet-safe |
| Fly-catching Restrepia | Medium indirect light (a couple of metres from a window) | Every 2–4 days; allow the surface to barely begin to dry | Pet-safe |
| Forest Pepper | Medium indirect light (a couple of metres from a window) | Every 6–9 days; allow top 3–4 cm of soil to dry | Mildly toxic to pets |
| Forest Spurflower | Medium indirect light (a couple of metres from a window) | Every 7-10 days in the growing season; every 14-21 days in winter | Mildly toxic to pets |
| Forget-me-not | Medium indirect light (a couple of metres from a window) | Weekly watering | Pet-safe |
| Forked Spleenwort | Medium indirect light (a couple of metres from a window) | Sparingly — water only when the growing medium is dry | Mildly toxic to pets |
| Formosan Polypody | Medium indirect light (a couple of metres from a window) | Every 5–7 days in active growth; every 10–14 days in cooler months | Pet-safe |
| Formosanum Toad Lily | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water when the top of the soil begins to dry, often twice weekly in summer heat | Mildly toxic to pets |
| Forrests Petrocosmea | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth; very sparingly in winter | Pet-safe |
| Fortune's Holly Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Fortune's Holly Fern | Medium indirect light (a couple of metres from a window) | Every 7–10 days; allow top few centimetres to dry between waterings | Mildly toxic to pets |
| Fortune's Plum Yew | Medium indirect light (a couple of metres from a window) | Every 7–14 days; allow the top inch of soil to partially dry between waterings | Toxic to pets |
| Foster's Basket Bromeliad | Medium indirect light (a couple of metres from a window) | Tank every 5–7 days; soil every 10–14 days | Pet-safe |
| Fountain Bamboo | Medium indirect light (a couple of metres from a window) | Twice weekly during the growing season; once weekly in cool periods | Pet-safe |
| Foxglove 'Camelot' | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water weekly in dry weather | Toxic to pets |
| Fragrant Bouquet Hosta | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water deeply 1-2 times weekly, more in heat | Toxic to pets |
| Fragrant Hosta 'Guacamole' | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, about every 5-7 days; more in sun and heat | Toxic to pets |
| Fragrant Peace Lily | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-10 days | Toxic to pets |
| Fragrant Solomon's Seal | Low light (north window or shaded room) | Every 5-7 days in active growth; drought-tolerant once established | Toxic to pets |
| Francee Hosta | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Toxic to pets |
| Freely Flowering Angraecum | Medium indirect light (a couple of metres from a window) | Every 3–5 days; avoid complete drying out | Pet-safe |
| Fringed Bleeding Heart | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly | Toxic to pets |
| Fringed Cobra Lily | Medium indirect light (a couple of metres from a window) | Regularly during growing season; reduce in dormancy | Toxic to pets |
| Fringed Loosestrife | Medium indirect light (a couple of metres from a window) | Regularly; keep soil consistently moist to wet | Mildly toxic to pets |
| Fringed Miniature Stelis | Medium indirect light (a couple of metres from a window) | Daily or near-daily; roots must not dry completely between watering | Pet-safe |
| Fringed Spurflower | Medium indirect light (a couple of metres from a window) | Regularly — keep soil evenly moist throughout the growing season | Mildly toxic to pets |
| Fringed Stelis | Medium indirect light (a couple of metres from a window) | Every 1–3 days depending on mount or medium and ambient temperature | Pet-safe |
| Fringed-sepal Primulina | Medium indirect light (a couple of metres from a window) | Reduced in winter; moderate in spring and summer | Mildly toxic to pets |
| Fritz Luth Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–3 days in spring and summer; every 3–5 days in winter | Pet-safe |
| Fritz Luth Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–3 days in growing season; every 4–5 days in winter | Pet-safe |
| Frohnleiten Epimedium | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 1-2 weeks | Mildly toxic to pets |
| frost grass | Medium indirect light (a couple of metres from a window) | Weekly or whenever the top 2–3 cm of soil dries out; reduce in autumn and winter | Pet-safe |
| Gargoyle Lepanthes | Medium indirect light (a couple of metres from a window) | Every 1–2 days; medium should be moist but not sodden | Pet-safe |
| Geogenanthus Undatus | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Mildly toxic to pets |
| Geranium × oxonianum 'Wargrave Pink' | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry; roughly weekly, more in heat | Mildly toxic to pets |
| Geranium macrorrhizum | Medium indirect light (a couple of metres from a window) | Water to establish; afterwards only in extended drought, roughly every 1-2 weeks if very dry | Pet-safe |
| Geranium macrorrhizum 'Bevan's Variety' | Medium indirect light (a couple of metres from a window) | When the top 4-5 cm of soil is dry; weekly to establish, seldom afterwards | Mildly toxic to pets |
| Geranium maculatum | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water deeply when the top 3-4 cm dries, roughly weekly in the growing season | Mildly toxic to pets |
| Geranium nodosum | Low light (north window or shaded room) | Water when the top 3-5 cm dries; established plants tolerate occasional dryness, roughly every 7-12 days in growing season | Mildly toxic to pets |
| Geranium phaeum | Medium indirect light (a couple of metres from a window) | Water when top 3-5 cm of soil is dry; keep evenly moist in its first season | Mildly toxic to pets |
| Geranium phaeum 'Album' | Medium indirect light (a couple of metres from a window) | Water when top 3-5 cm of soil is dry; keep evenly moist while establishing | Mildly toxic to pets |
| Geranium phaeum 'Lily Lovell' | Medium indirect light (a couple of metres from a window) | Water when top 3-5 cm of soil is dry; keep evenly moist while establishing | Mildly toxic to pets |
| Geranium phaeum 'Samobor' | Medium indirect light (a couple of metres from a window) | Water when top 3-5 cm of soil is dry; keep evenly moist while establishing | Mildly toxic to pets |
| Geranium sylvaticum | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water deeply when the top 3-4 cm dries, roughly weekly in growing season | Mildly toxic to pets |
| Geranium sylvaticum 'Mayflower' | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water deeply when the top 3-4 cm dries, about weekly through the growing season | Mildly toxic to pets |
| Germander Speedwell | Medium indirect light (a couple of metres from a window) | Moderate — keep soil consistently moist, especially in summer | Pet-safe |
| Ghost Fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil starts to dry, often every 4-7 days | Mildly toxic to pets |
| Ghost Fern | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season, reduce in winter | Pet-safe |
| Giant Bellflower | Medium indirect light (a couple of metres from a window) | Regularly — keep soil consistently moist throughout the growing season | Pet-safe |
| Giant Dragon Orchid | Low light (north window or shaded room) | Daily or every other day | Pet-safe |
| Giant Hard Fern | Medium indirect light (a couple of metres from a window) | 2-3 times per week in growing season; reduce in winter | Pet-safe |
| Giant Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 3–4 days in active growth; every 5–7 days in winter | Pet-safe |
| Giant Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist spring through early summer; tolerates drier conditions once fully summer-dormant. | Mildly toxic to pets |
| Giant Typhonium | Medium indirect light (a couple of metres from a window) | Regularly during the growing season; reduce through autumn and winter | Toxic to pets |
| Giant Wart Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days in active growth; reduce in cooler months | Pet-safe |
| Glaucous Sedge | Medium indirect light (a couple of metres from a window) | Low to moderate — drought-tolerant when established | Pet-safe |
| Goeppertia majestica | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, typically every 5-7 days | Pet-safe |
| Goeppertia majestica 'Whitestar' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, typically every 5-7 days | Pet-safe |
| Goeppertia Medallion | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Goeppertia Pluriplicata | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Goeppertia Roseopicta Illustris | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Gold Dust Dracaena | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Gold Heart Bleeding Heart | Medium indirect light (a couple of metres from a window) | Weekly during the growing season, reducing as foliage dies back in summer | Toxic to pets |
| Golden Hakone Grass | Medium indirect light (a couple of metres from a window) | Weekly, or whenever the top 2–3 cm of soil dry out | Mildly toxic to pets |
| Golden Japanese Sweet Flag | Medium indirect light (a couple of metres from a window) | Keep constantly moist; tolerate standing water | Pet-safe |
| Golden Male Fern | Medium indirect light (a couple of metres from a window) | Weekly during the growing season; reduce in winter but do not allow to dry out completely | Mildly toxic to pets |
| golden mosaic plant | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; every 10–14 days in winter | Pet-safe |
| Golden pothos | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, every 7-10 days | Toxic to pets |
| Golden-Net Plant | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; every 7–10 days in winter | Pet-safe |
| Gooseneck Loosestrife | Medium indirect light (a couple of metres from a window) | Regularly; moist soil preferred | Mildly toxic to pets |
| Gourd-leaf Begonia | Medium indirect light (a couple of metres from a window) | Every 6–9 days in spring and summer; every 12–16 days in winter | Toxic to pets |
| Graceful Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–3 days in summer; every 4–5 days in winter | Pet-safe |
| Gray's sedge | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water every 2–4 days in dry weather | Pet-safe |
| Great Expectations Hosta | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Toxic to pets |
| Great Masterwort | Medium indirect light (a couple of metres from a window) | Regularly — keep soil evenly moist throughout the growing season | Mildly toxic to pets |
| Great Solomon's Seal | Low light (north window or shaded room) | Every 4-6 days in active growth; drought-tolerant once established | Toxic to pets |
| Great White Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist in spring; reduce after summer dormancy | Mildly toxic to pets |
| Greater Periwinkle | Medium indirect light (a couple of metres from a window) | Every 5–7 days during active growth; every 10–14 days once established | Toxic to pets |
| Greater Stitchwort | Medium indirect light (a couple of metres from a window) | Moderate; keep soil evenly moist during spring and summer | Mildly toxic to pets |
| Greater Woodrush | Low light (north window or shaded room) | Weekly in first season, then largely self-sufficient | Pet-safe |
| Greek Jancaea | Medium indirect light (a couple of metres from a window) | Little and often to keep root zone moist; almost dry during winter dormancy | Pet-safe |
| Green Dragon | Medium indirect light (a couple of metres from a window) | Regularly during spring and summer growing season | Toxic to pets |
| Green Gem Boxwood | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, about weekly while establishing | Toxic to pets |
| Green Moor Grass | Medium indirect light (a couple of metres from a window) | Every 1–2 weeks during establishment; largely self-sufficient once established | Pet-safe |
| Green Prayer Plant | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Green Sheen Japanese Spurge | Low light (north window or shaded room) | Weekly during the first two growing seasons; once established, water during prolonged dry spells only | Mildly toxic to pets |
| Green Spleenwort | Medium indirect light (a couple of metres from a window) | When the top centimetre of soil dries out | Pet-safe |
| Green Velvet Boxwood | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, about weekly while establishing | Toxic to pets |
| Grey sedge | Medium indirect light (a couple of metres from a window) | Occasional once established; more frequent in full sun or sandy soil | Pet-safe |
| Griffith's Begonia | Medium indirect light (a couple of metres from a window) | When the top 2–3 cm of compost feel dry | Toxic to pets |
| Groby's Specklinia | Medium indirect light (a couple of metres from a window) | Every 2–3 days; mounted plants every 1–2 days in warm conditions | Pet-safe |
| Guatemalan Blue Sage | Medium indirect light (a couple of metres from a window) | Every 5-7 days during the growing season | Pet-safe |
| Guppy's Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in active growth; every 3–4 weeks in winter | Pet-safe |
| Guzmania 'Exodus' | Medium indirect light (a couple of metres from a window) | Keep the central cup filled; flush and refill every 1-2 weeks | Pet-safe |
| Gymnocarpium dryopteris 'Plumosum' | Low light (north window or shaded room) | Keep the soil consistently moist, watering when the top 1-2 cm dries, roughly every 4-6 days | Mildly toxic to pets |
| Gyoku-ryu Mondo Grass | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-7 days in growth | Pet-safe |
| Hairy alumroot | Medium indirect light (a couple of metres from a window) | Once or twice per week during active growth; less in winter | Pet-safe |
| Hairy Bertolonia | Medium indirect light (a couple of metres from a window) | Every 4–6 days; keep evenly moist | Pet-safe |
| Hairy Parakohleria | Medium indirect light (a couple of metres from a window) | Every 5–7 days during active growth; reduce to every 10–14 days in cooler months | Pet-safe |
| Hairy Slipper Orchid | Medium indirect light (a couple of metres from a window) | Every 5–7 days year-round | Pet-safe |
| Hairy Solomon's Seal | Medium indirect light (a couple of metres from a window) | Regular; keep evenly moist | Mildly toxic to pets |
| Hairy Spiral Ginger | Medium indirect light (a couple of metres from a window) | Frequent — keep soil consistently moist throughout the growing season, reducing slightly in winter. | Mildly toxic to pets |
| Hairy St John's-wort | Medium indirect light (a couple of metres from a window) | Moderate — water when the top 2–3 cm of soil is dry | Toxic to pets |
| Hairy Violet | Medium indirect light (a couple of metres from a window) | Water moderately; allow the top centimetre of soil to dry between waterings. | Pet-safe |
| Hairy Water Clover | Medium indirect light (a couple of metres from a window) | Permanently in waterlogged substrate or submerged | Mildly toxic to pets |
| Hairy Woodrush | Low light (north window or shaded room) | Every 7–10 days during the growing season | Pet-safe |
| Hairy-Leaf Begonia | Medium indirect light (a couple of metres from a window) | When the top 2 cm of compost feel dry | Toxic to pets |
| Hairy-tongued Restrepia | Medium indirect light (a couple of metres from a window) | Every 2–4 days; medium stays lightly moist | Pet-safe |
| Hakonechloa All Gold | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water 1-2 times weekly, more in heat | Mildly toxic to pets |
| Hamilton's Strobilanthes | Medium indirect light (a couple of metres from a window) | 2–3 times weekly in summer; once weekly in winter | Mildly toxic to pets |
| Hammock Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season, every 10–14 days in winter | Pet-safe |
| Hard Fern | Medium indirect light (a couple of metres from a window) | 2-3 times per week in growing season; reduce slightly in winter | Pet-safe |
| Hart's Tongue Fern | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Hatfieldii Yew | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, about weekly while establishing | Toxic to pets |
| Hay-scented Buckler Fern | Medium indirect light (a couple of metres from a window) | Keep evenly moist year-round | Pet-safe |
| Hay-Scented Fern | Medium indirect light (a couple of metres from a window) | Keep evenly moist while establishing; water when the top 2-3 cm of soil is dry, roughly weekly | Mildly toxic to pets |
| Heart-leaf Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 1–2 days; mounted plants may need daily misting | Pet-safe |
| Heart-leaved Blechnum | Medium indirect light (a couple of metres from a window) | Twice a week in summer, once a week in cooler months | Pet-safe |
| Heart-leaved Homalomena | Low light (north window or shaded room) | Every 10–14 days in growing season; every 14–21 days in winter | Toxic to pets |
| Heartleaf Bergenia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; reduce significantly in winter | Pet-safe |
| Heartleaf Foamflower | Medium indirect light (a couple of metres from a window) | Regular; keep consistently moist | Pet-safe |
| Heartleaf Hornbeam | Medium indirect light (a couple of metres from a window) | Moderate; water regularly when young; maintain consistent moisture | Pet-safe |
| Heartleaf philodendron | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, every 7-10 days | Toxic to pets |
| Hedera colchica | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 6-8 days in growth | Toxic to pets |
| Hedge Woundwort | Medium indirect light (a couple of metres from a window) | Regularly during active growth; reduce in winter | Mildly toxic to pets |
| Hedgehog-Lip Bulbophyllum | Medium indirect light (a couple of metres from a window) | Every 3–5 days; mounted plants may need daily misting | Pet-safe |
| Hellebore | Medium indirect light (a couple of metres from a window) | Weekly watering until established | Toxic to pets |
| Hellebore 'Penny's Pink' | Medium indirect light (a couple of metres from a window) | Keep evenly moist during establishment and dry spells; established clumps are moderately drought-tolerant | Toxic to pets |
| Helleborus × hybridus | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry; roughly weekly in the first year, then only in dry spells once established | Toxic to pets |
| Helleborus foetidus | Medium indirect light (a couple of metres from a window) | When the top few centimetres of soil dry out; weekly while establishing, then rarely once settled | Toxic to pets |
| Helleborus orientalis 'Ivory Prince' | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry; weekly while establishing, then during dry spells | Toxic to pets |
| Hemiboea subcapitata | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Mildly toxic to pets |
| Hen-and-Chickens Sundew | Medium indirect light (a couple of metres from a window) | Continuously in a tray of 1–2 cm pure water; never allow to dry out. | Pet-safe |
| Henry's honeysuckle | Medium indirect light (a couple of metres from a window) | Weekly during dry periods; established plants are relatively drought-tolerant | Mildly toxic to pets |
| Henry's Lily | Medium indirect light (a couple of metres from a window) | When top 3–4 cm of soil feels dry | Toxic to pets |
| Herb Robert | Medium indirect light (a couple of metres from a window) | Low to moderate; water only during prolonged dry spells | Pet-safe |
| Hermann's Pride Yellow Archangel | Medium indirect light (a couple of metres from a window) | Every 7–14 days during the growing season; reduce in winter | Mildly toxic to pets |
| Hermit Primulina | Medium indirect light (a couple of metres from a window) | Allow the top half of the compost to dry between waterings | Mildly toxic to pets |
| Hernando Begonia | Medium indirect light (a couple of metres from a window) | When the top 2 cm of compost feel dry | Toxic to pets |
| Herradura Masdevallia | Medium indirect light (a couple of metres from a window) | 3–5 times per week | Pet-safe |
| Herrenhausen Shield Fern | Low light (north window or shaded room) | Every 3–5 days; keep moist but well-drained | Pet-safe |
| Heuchera villosa 'Autumn Bride' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in summer | Pet-safe |
| Heucherella 'Tapestry' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about every 5-7 days in summer | Pet-safe |
| Heucherella Stoplight | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water deeply once or twice a week in dry spells | Pet-safe |
| Heucherella Sunrise Falls | Medium indirect light (a couple of metres from a window) | Keep evenly moist; in containers and baskets water more often, even daily in summer heat | Pet-safe |
| Heucherella Sweet Tea | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water deeply once or twice a week in dry weather | Pet-safe |
| Hicksii Yew | Medium indirect light (a couple of metres from a window) | Every 7-10 days while establishing, then as needed | Toxic to pets |
| Himalayan Cassiope | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water before the top 2 cm of growing medium dries out. | Mildly toxic to pets |
| Himalayan Yew | Medium indirect light (a couple of metres from a window) | Weekly during establishment; every 1–2 weeks once established | Toxic to pets |
| Hirsute Slipper Orchid | Medium indirect light (a couple of metres from a window) | Every 4–5 days in growth; occasional misting only during 30–40 day winter rest | Pet-safe |
| Hirta Toad Lily | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water when the surface begins to dry, typically once or twice a week in summer | Mildly toxic to pets |
| Hirtz's Dragon Orchid | Medium indirect light (a couple of metres from a window) | Daily to every other day; the medium must remain damp throughout | Pet-safe |
| Hirtz's Lepanthes | Medium indirect light (a couple of metres from a window) | Daily misting; never allow roots to fully dry | Pet-safe |
| Hollow-Rooted Fumewort | Medium indirect light (a couple of metres from a window) | Rainfall-dependent during spring growth; completely dry in summer dormancy | Toxic to pets |
| Homalomena 'Emerald Gem' | Medium indirect light (a couple of metres from a window) | When the top 3 cm of soil is dry, roughly every 6-9 days | Toxic to pets |
| Homalomena Lindenii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Toxic to pets |
| Homalomena Maggy | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Homalomena Selby | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Homalomena Sp. Selby | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Toxic to pets |
| Homalomena wallisii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Toxic to pets |
| Honesty | Medium indirect light (a couple of metres from a window) | Twice weekly in dry spells; keep soil consistently moist | Mildly toxic to pets |
| Hooded Maxillaria | Medium indirect light (a couple of metres from a window) | Every 5–7 days year-round; slight reduction in winter | Pet-safe |
| Hooded Pleurothallis | Medium indirect light (a couple of metres from a window) | Daily misting or watering; roots must remain evenly moist at all times | Pet-safe |
| Hooker's Anchomanes | Medium indirect light (a couple of metres from a window) | Every 7–10 days during growth; completely dry during dormancy | Toxic to pets |
| Hooker's Holly Fern | Medium indirect light (a couple of metres from a window) | Every 7–10 days, less in winter | Pet-safe |
| Hosta | Medium indirect light (a couple of metres from a window) | Keep evenly moist; roughly weekly in the ground, more often in pots or heat | Toxic to pets |
| Hosta 'First Frost' | Medium indirect light (a couple of metres from a window) | When top 2-3 cm of soil begins to dry, about every 5-7 days, more in heat | Toxic to pets |
| Hosta 'June' | Medium indirect light (a couple of metres from a window) | When top 2-3 cm of soil begins to dry, about every 5-7 days, more in heat | Toxic to pets |
| Hosta 'Patriot' | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly every 5-7 days | Toxic to pets |
| Hosta 'Sum and Substance' | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, about every 5-7 days; more in heat | Toxic to pets |
| Hosta sieboldiana 'Elegans' | Low light (north window or shaded room) | When top 2-3 cm of soil begins to dry, about every 5-7 days, more in heat | Toxic to pets |
| Hound's Tongue Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of mix begins to dry, roughly every 7-10 days | Mildly toxic to pets |
| Hungarian Barren Strawberry | Medium indirect light (a couple of metres from a window) | Low; drought-tolerant once established | Pet-safe |
| Hydrocotyle leucocephala | Medium indirect light (a couple of metres from a window) | Fully submerged or floating; 30-50% aquarium water change weekly | Mildly toxic to pets |
| Hygrophila corymbosa | Medium indirect light (a couple of metres from a window) | Continuously submerged; 30-50% aquarium water change weekly | Mildly toxic to pets |
| Hygrophila difformis | Medium indirect light (a couple of metres from a window) | Continuously submerged; 30-50% aquarium water change weekly | Mildly toxic to pets |
| Hygrophila pinnatifida | Medium indirect light (a couple of metres from a window) | Continuously submerged; 30-50% aquarium water change weekly | Mildly toxic to pets |
| Hygrophila polysperma | Medium indirect light (a couple of metres from a window) | Continuously submerged; 30-50% aquarium water change weekly | Mildly toxic to pets |
| Ice Dance Japanese Sedge | Low light (north window or shaded room) | Every 7-10 days or when the top 3-4 cm of soil is dry | Pet-safe |
| Ice Dance Sedge | Medium indirect light (a couple of metres from a window) | Keep moist while establishing; water deeply weekly in dry spells | Mildly toxic to pets |
| Imbricate Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days; do not allow compost to dry out | Pet-safe |
| Imbricate Sword Fern | Low light (north window or shaded room) | Every 5–7 days in summer, every 10–14 days in winter | Pet-safe |
| Immersed Stelis | Medium indirect light (a couple of metres from a window) | Daily misting for mounted specimens; every 2 days for potted plants | Pet-safe |
| Impatiens | Medium indirect light (a couple of metres from a window) | Twice-weekly watering | Pet-safe |
| Impatiens balsamina | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 2-4 days in summer | Pet-safe |
| Impatiens walleriana 'Xtreme Salmon' | Low light (north window or shaded room) | When the top 1-2 cm of soil begins to dry, often every 1-3 days in summer | Pet-safe |
| Imperial Green | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Indian Cucumber Root | Low light (north window or shaded room) | Consistently moist; water whenever the top 2–3 cm of soil begins to dry during the growing season | Mildly toxic to pets |
| Inner-grooved Specklinia | Medium indirect light (a couple of metres from a window) | Daily or every other day; keep consistently moist | Pet-safe |
| Intermediate Galangal | Medium indirect light (a couple of metres from a window) | Twice a week in warm months; once a week or less in cooler conditions | Mildly toxic to pets |
| Intermediate Polypody | Medium indirect light (a couple of metres from a window) | Every 7–10 days in active growth (autumn–spring); reduce to every 2–3 weeks in summer | Pet-safe |
| Interrupted Fern | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water every 3-5 days | Mildly toxic to pets |
| Iron Butterfly Foamflower | Medium indirect light (a couple of metres from a window) | Once or twice per week during the growing season; water sparingly in winter. | Mildly toxic to pets |
| Iron Butterfly Tiarella | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water deeply once or twice a week when rainfall is short | Mildly toxic to pets |
| Itsy Bitsy Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 2–3 weeks in winter | Pet-safe |
| Ivan Cranesbill | Medium indirect light (a couple of metres from a window) | Once or twice a week in dry spells; less in cooler or wetter periods | Pet-safe |
| Ivory Primulina | Medium indirect light (a couple of metres from a window) | Allow the top half of compost to dry before rewatering | Mildly toxic to pets |
| Ivy-Leaf Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in spring/summer; every 3–4 weeks in autumn/winter | Pet-safe |
| Ivy-Leaved Cyclamen | Medium indirect light (a couple of metres from a window) | Drought-tolerant once established; rely entirely on natural rainfall | Toxic to pets |
| Ivy-leaved Duckweed | Medium indirect light (a couple of metres from a window) | Permanently submerged | Pet-safe |
| ivy-leaved scindapsus | Medium indirect light (a couple of metres from a window) | Every 7–14 days depending on season and light | Toxic to pets |
| Jack-in-the-Pulpit | Low light (north window or shaded room) | Keep the soil consistently moist throughout the growing season, watering whenever the surface begins to dry; it tolerates short dry spells but resents drought. | Toxic to pets |
| Janke's Gesneriad | Medium indirect light (a couple of metres from a window) | Water at the root zone only when the soil approaches dryness, roughly every 10–14 days in the growing season | Mildly toxic to pets |
| Japanese astilbe | Medium indirect light (a couple of metres from a window) | Twice per week in active growth; weekly in cooler seasons | Pet-safe |
| Japanese Bird's Nest Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Japanese Brake Fern | Medium indirect light (a couple of metres from a window) | Every 4–6 days in the growing season; every 7–10 days in winter | Pet-safe |
| Japanese Catmint | Medium indirect light (a couple of metres from a window) | Every 5–7 days; do not allow to dry out completely | Pet-safe |
| Japanese Chain Fern | Medium indirect light (a couple of metres from a window) | Every 4–6 days in summer, every 8–12 days in winter | Pet-safe |
| Japanese Fairy Bells | Medium indirect light (a couple of metres from a window) | Regular; keep soil evenly moist throughout the growing season. | Mildly toxic to pets |
| Japanese False Spleenwort | Medium indirect light (a couple of metres from a window) | Every 3–5 days in growing season; reduce slightly in winter | Mildly toxic to pets |
| Japanese forest grass | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water 1-2 times weekly, more in heat | Mildly toxic to pets |
| Japanese Holly Fern | Low light (north window or shaded room) | Every 7–10 days; allow top 2–3 cm of soil to dry between waterings | Pet-safe |
| Japanese kerria | Medium indirect light (a couple of metres from a window) | Weekly during establishment; drought-tolerant once established | Mildly toxic to pets |
| Japanese Laurel | Low light (north window or shaded room) | Once per week indoors; allow top 2–5 cm (1–2 in) of soil to dry between waterings | Mildly toxic to pets |
| Japanese Nutmeg Yew | Medium indirect light (a couple of metres from a window) | Every 7–10 days when establishing; established trees rely on rainfall with supplemental watering in dry spells | Mildly toxic to pets |
| Japanese Painted Fern | Medium indirect light (a couple of metres from a window) | Every 4–7 days; keep soil evenly moist | Pet-safe |
| Japanese Painted Fern 'Pictum' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is just drying, often every 4-7 days | Mildly toxic to pets |
| Japanese Peperomia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; reduce in winter | Pet-safe |
| Japanese Pepper Vine | Medium indirect light (a couple of metres from a window) | When the top 2–3 cm of soil dry out, approximately every 5–7 days | Mildly toxic to pets |
| Japanese Plum Yew | Medium indirect light (a couple of metres from a window) | Keep evenly moist; weekly in dry spells, more while establishing | Mildly toxic to pets |
| Japanese Royal Fern | Medium indirect light (a couple of metres from a window) | Frequently — keep soil constantly moist | Pet-safe |
| Japanese Sage | Medium indirect light (a couple of metres from a window) | Regular during growing season; reduce in winter | Pet-safe |
| Japanese Shield Fern | Medium indirect light (a couple of metres from a window) | Regular; keep soil evenly moist | Pet-safe |
| Japanese Solomon's Seal | Medium indirect light (a couple of metres from a window) | Every 5–7 days during growth; minimal when dormant | Mildly toxic to pets |
| Japanese Spurge | Low light (north window or shaded room) | Weekly during establishment (first two growing seasons); monthly or during dry spells once established | Mildly toxic to pets |
| Japanese Stiff Shield Fern | Medium indirect light (a couple of metres from a window) | Weekly in the first year, then only during prolonged dry spells | Pet-safe |
| Japanese Tassel Fern | Medium indirect light (a couple of metres from a window) | Regular; maintain consistent moisture | Pet-safe |
| Japanese Wood Poppy | Medium indirect light (a couple of metres from a window) | Regular; keep soil evenly moist during the growing season | Mildly toxic to pets |
| Johannes Cape Primrose | Medium indirect light (a couple of metres from a window) | Every 5-8 days in active growth; every 2-3 weeks in winter | Pet-safe |
| Johnson's Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 1–2 days in summer; every 3–4 days in cooler months | Pet-safe |
| Joseph's Lepanthes | Medium indirect light (a couple of metres from a window) | Every 7–10 days (potted); near-daily misting if mounted | Pet-safe |
| Jupiter's Distaff | Medium indirect light (a couple of metres from a window) | Regularly in dry spells, especially in sun | Pet-safe |
| Kacip Fatimah | Low light (north window or shaded room) | Water when the top 1–2 cm of soil begins to dry; typically every 4–6 days in warm conditions | Mildly toxic to pets |
| Kamchatka Bugbane | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season; weekly when dormant | Mildly toxic to pets |
| Kangaroo Vine | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about every 7-10 days | Pet-safe |
| Kaurima Pyrenacantha | Medium indirect light (a couple of metres from a window) | Every 7–14 days in the growing season; monthly or less in winter | Mildly toxic to pets |
| Keisk's Leucothoe | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; sensitive to both drought and waterlogging | Toxic to pets |
| Keiske's Leucothoe | Medium indirect light (a couple of metres from a window) | Once or twice a week in the growing season, less in winter | Toxic to pets |
| Kentia palm | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, every 10-14 days | Pet-safe |
| Kidney Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days during active growth; every 6–8 days in winter | Pet-safe |
| Killarney Fern | Low light (north window or shaded room) | Continuously moist — maintain permanent moisture in the sphagnum substrate and high atmospheric humidity at all times | Mildly toxic to pets |
| Kimberly queen fern | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, every 5-7 days | Pet-safe |
| King of Hearts Bleeding Heart | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly | Toxic to pets |
| King of Hearts Brunnera | Low light (north window or shaded room) | Keep soil consistently moist; water when the top 2-3 cm dries, about every 5-7 days in warm weather | Mildly toxic to pets |
| Kirchhoff's Air Plant | Medium indirect light (a couple of metres from a window) | Mist 3–4 times per week or soak for 20–30 minutes twice a week. | Mildly toxic to pets |
| Kitten Tails | Medium indirect light (a couple of metres from a window) | Infrequently; dry to medium-dry | Mildly toxic to pets |
| Klotzsch's Parlour Palm | Medium indirect light (a couple of metres from a window) | Every 7–10 days in summer, every 14–21 days in winter | Pet-safe |
| Korean Angelica | Medium indirect light (a couple of metres from a window) | 2-3 times per week in active growth; reduce in winter | Mildly toxic to pets |
| Korean Rock Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; reduce in winter | Pet-safe |
| Krossa Regal Hosta | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Toxic to pets |
| Kuma Bamboo Grass | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season, reduce in winter | Pet-safe |
| Kunstler's Scaphochlamys | Low light (north window or shaded room) | Regularly; keep substrate consistently moist year-round | Mildly toxic to pets |
| Kuril Bamboo | Medium indirect light (a couple of metres from a window) | 2-3 times per week in growing season; weekly in winter | Pet-safe |
| Labrador violet | Medium indirect light (a couple of metres from a window) | Every 5–7 days; keep consistently moist | Pet-safe |
| Lacandon Zamia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growing season; every 2–3 weeks in winter | Toxic to pets |
| Lady in Red Fern | Medium indirect light (a couple of metres from a window) | Keep consistently moist, roughly every 3-5 days for potted plants | Mildly toxic to pets |
| Lady palm | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, every 7-10 days | Pet-safe |
| Lakeside Black Satin Hosta | Low light (north window or shaded room) | When the top 2-3cm of soil is dry, roughly every 5-7 days during active growth | Toxic to pets |
| Lamprocapnos spectabilis 'Alba' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil begins to dry, roughly every 5-7 days in spring | Toxic to pets |
| Lamprocapnos spectabilis 'Gold Heart' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil begins to dry, roughly every 5-7 days in spring | Toxic to pets |
| Lance-leaf Stelis | Medium indirect light (a couple of metres from a window) | Every 2–3 days; never allow the medium to dry completely | Pet-safe |
| Lance-leaved Sundew | Medium indirect light (a couple of metres from a window) | Keep tray topped up year-round | Pet-safe |
| Lance-Leaved Trillium | Medium indirect light (a couple of metres from a window) | Moist in spring; more drought-tolerant than most Trilliums once dormant | Mildly toxic to pets |
| Laos Lady Palm | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14–21 days in winter | Pet-safe |
| Large-cloaked Stelis | Medium indirect light (a couple of metres from a window) | Every 1–2 days, never allowing the medium to dry completely | Pet-safe |
| Large-flowered Bellwort | Medium indirect light (a couple of metres from a window) | Moderate; water regularly during spring and early summer growth. Established plants tolerate summer drought. | Pet-safe |
| Large-Flowered Petrocosmea | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth; sparingly in winter | Pet-safe |
| Large-Leaved Drymonia | Medium indirect light (a couple of metres from a window) | Every 5–8 days; allow top 2 cm to dry slightly between waterings | Pet-safe |
| Large-leaved Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–3 days; adjust based on temperature and pot size | Pet-safe |
| Large-Spike Peperomia | Medium indirect light (a couple of metres from a window) | Every 2–3 weeks (allow top half to two-thirds of soil to dry) | Pet-safe |
| Large-Vein Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days during the growing season; every 3–4 weeks in winter | Pet-safe |
| Leather Polypody | Medium indirect light (a couple of metres from a window) | Every 5–8 days; keep soil consistently moist but not waterlogged | Mildly toxic to pets |
| Leatherleaf Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of mix is dry, roughly every 5-8 days | Mildly toxic to pets |
| Leathery Polypody | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growing season; monthly in winter dormancy | Pet-safe |
| Lemon button fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, every 4-7 days | Pet-safe |
| Lepanthes telipogoniflora | Medium indirect light (a couple of metres from a window) | Keep roots constantly moist but never sodden, misting or watering daily | Mildly toxic to pets |
| Leslie Bird's Nest Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Lesser Periwinkle | Medium indirect light (a couple of metres from a window) | Weekly during establishment; largely self-sufficient in average rainfall climates | Toxic to pets |
| Lesser Petrocosmea | Medium indirect light (a couple of metres from a window) | Every 7–10 days in active growth; reduce significantly in winter | Pet-safe |
| Licuala Orbicularis | Low light (north window or shaded room) | Keep consistently moist; water when the surface just begins to dry | Mildly toxic to pets |
| Lilafee Epimedium | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly | Mildly toxic to pets |
| Lily of the valley | Low light (north window or shaded room) | Weekly watering | Toxic to pets |
| Lilyturf-like Primulina | Medium indirect light (a couple of metres from a window) | Every 10–14 days in active growth; every 3–4 weeks in winter | Mildly toxic to pets |
| Lime Rickey Heuchera | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about weekly | Pet-safe |
| Linden-Leaf Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days (allow soil to partially dry) | Pet-safe |
| Little Hard Fern | Medium indirect light (a couple of metres from a window) | 2-3 times per week in the growing season; less often in winter | Pet-safe |
| Little Leather Lepanthes | Medium indirect light (a couple of metres from a window) | Daily or every 2 days; keep roots evenly moist | Pet-safe |
| Little Sweet Betsy | Medium indirect light (a couple of metres from a window) | Consistently moist from emergence through early summer; reduced in summer dormancy | Mildly toxic to pets |
| Lobb's Bulbophyllum | Medium indirect light (a couple of metres from a window) | Keep evenly moist in growth; water every 3-5 days | Pet-safe |
| Log Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days; soil should remain consistently moist to occasionally wet | Mildly toxic to pets |
| London Pride | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; less in winter | Pet-safe |
| London Pride | Medium indirect light (a couple of metres from a window) | Weekly during dry spells; little additional watering needed in temperate climates | Pet-safe |
| Lonesome Dove Hosta | Low light (north window or shaded room) | When the top 2-3cm of soil is dry, about every 5-7 days during active growth | Toxic to pets |
| Long-feathered Aponogeton | Medium indirect light (a couple of metres from a window) | Permanently submerged; weekly 25–30% water changes | Pet-safe |
| Long-leaf Parlor Palm | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; reduce to every 10–14 days in winter | Pet-safe |
| Long-leaf Parlour Palm | Medium indirect light (a couple of metres from a window) | Every 10–14 days in summer, every 2–3 weeks in winter | Pet-safe |
| Long-Spurred Violet | Medium indirect light (a couple of metres from a window) | Regular; keep soil evenly moist | Pet-safe |
| Long-stalked Spiderwort | Medium indirect light (a couple of metres from a window) | Weekly during active growth; reduce after summer die-back | Mildly toxic to pets |
| Long-tailed Masdevallia | Medium indirect light (a couple of metres from a window) | Daily in warm months; every 1-2 days in cool months — medium must not dry out between waterings | Pet-safe |
| Loranthus-leaf Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 2-3 days; keep evenly moist | Pet-safe |
| Lords-and-Ladies | Low light (north window or shaded room) | Weekly during active growth (autumn–spring); reduce in summer dormancy | Toxic to pets |
| Lotax Dragon Orchid | Medium indirect light (a couple of metres from a window) | Every 2–3 days; never fully dry | Pet-safe |
| Low Shield Plant | Low light (north window or shaded room) | Every 10–14 days; less in winter | Toxic to pets |
| Lowland Brittle Fern | Medium indirect light (a couple of metres from a window) | Moderate — keep evenly moist, allowing the surface to just dry between waterings | Mildly toxic to pets |
| Loxostigma griffithii | Medium indirect light (a couple of metres from a window) | When the surface begins to dry, roughly every 4-6 days in growth | Mildly toxic to pets |
| Lucky bamboo | Medium indirect light (a couple of metres from a window) | Change water every 1-2 weeks if grown hydroponically | Toxic to pets |
| Ludisia discolor 'Alba' | Low light (north window or shaded room) | When the top 1-2 cm of mix is just drying, roughly every 5-7 days | Pet-safe |
| Lund's Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Lungwort | Medium indirect light (a couple of metres from a window) | Twice weekly in dry spells; keep soil consistently moist | Mildly toxic to pets |
| Lungwort Pulmonaria | Low light (north window or shaded room) | Keep soil evenly moist; water every 4-6 days in dry spells, more in containers | Mildly toxic to pets |
| Luxuriant Bleeding Heart | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly | Toxic to pets |
| Luzon Begonia | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry | Toxic to pets |
| Ly's Wax Plant | Medium indirect light (a couple of metres from a window) | Every 7–10 days in summer, every 14–21 days in winter | Pet-safe |
| Lysimachia nummularia | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water whenever the surface begins to dry | Mildly toxic to pets |
| Lysimachia nummularia 'Aurea' | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water whenever the surface starts to dry | Mildly toxic to pets |
| Macarthur Palm | Medium indirect light (a couple of metres from a window) | Every 5–7 days during growing season; reduce in cooler months | Pet-safe |
| Macho Fern | Medium indirect light (a couple of metres from a window) | Every 2–4 days in summer; every 5–7 days in winter | Pet-safe |
| Madagascar Feather Palm | Medium indirect light (a couple of metres from a window) | Every 5–7 days in warm conditions; every 10–14 days in cooler periods | Pet-safe |
| Madagascar Lace Plant | Low light (north window or shaded room) | Submerged aquatic; 25–30% water changes weekly | Pet-safe |
| magic star stromanthe | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; every 10–14 days in winter | Pet-safe |
| Magnificent Homalomena | Medium indirect light (a couple of metres from a window) | Every 10–14 days in growing season; every 14–21 days in winter | Toxic to pets |
| Mahonia aquifolium Apollo | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, weekly through the first year then occasionally | Pet-safe |
| Mahonia Charity | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, weekly to establish then chiefly during droughts | Pet-safe |
| Mahonia Pinnacle | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, weekly through the first year then occasionally | Pet-safe |
| Mahonia repens | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, weekly to establish then rarely | Pet-safe |
| Mahonia Soft Caress | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, about weekly and more attentively than spinier mahonias | Pet-safe |
| Mahonia Winter Sun | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, weekly while establishing then only in dry spells | Pet-safe |
| Maidenhair fern | Medium indirect light (a couple of metres from a window) | Keep evenly moist — often every 2-3 days | Pet-safe |
| Maingay's Ginger | Medium indirect light (a couple of metres from a window) | 2–3 times per week | Mildly toxic to pets |
| Majeste Pulmonaria | Low light (north window or shaded room) | Keep soil evenly moist; water every 4-6 days in dry weather, more for containers | Mildly toxic to pets |
| many-flowered cape primrose | Medium indirect light (a couple of metres from a window) | Every 10–14 days; allow soil to dry between waterings | Pet-safe |
| Many-flowered Schismatoglottis | Low light (north window or shaded room) | Every 7–10 days during active growth; less in cooler months | Toxic to pets |
| Many-Flowered Temple Bells | Medium indirect light (a couple of metres from a window) | Every 3–4 days in growth (March–October); twice a month during winter dormancy to keep rhizomes from desiccating | Mildly toxic to pets |
| Mapu Fan Palm | Medium indirect light (a couple of metres from a window) | Every 5–7 days in summer; every 10–14 days in winter | Pet-safe |
| Maranta Bicolor | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Maranta leuconeura 'Mint' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Maranta Leuconeura Green Beauty | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Marble Earth Star | Medium indirect light (a couple of metres from a window) | Every 7–10 days | Pet-safe |
| Marbled Earth Star | Medium indirect light (a couple of metres from a window) | Water when top 2-3 cm of soil dries, roughly every 7-10 days | Pet-safe |
| Marcgrave's Nidularium | Medium indirect light (a couple of metres from a window) | Weekly cup refill; medium kept lightly moist | Pet-safe |
| Marginal Wood Fern | Low light (north window or shaded room) | Keep evenly moist while establishing; water deeply during droughts, about every 7-10 days in dry summers | Pet-safe |
| Marmalade Heuchera | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly | Pet-safe |
| Martagon Lily | Medium indirect light (a couple of metres from a window) | When top 3–4 cm of soil feels dry | Toxic to pets |
| Masaguno Sasa | Medium indirect light (a couple of metres from a window) | 2-3 times per week in growing season; reduce to weekly in winter | Pet-safe |
| Masdevallia Angel Frost | Medium indirect light (a couple of metres from a window) | Keep evenly moist year-round, watering about every 2-4 days so the medium never dries out | Pet-safe |
| Masdevallia coccinea | Medium indirect light (a couple of metres from a window) | Keep evenly moist all year, watering about every 2-4 days so the medium never dries fully | Pet-safe |
| Masdevallia tovarensis | Medium indirect light (a couple of metres from a window) | Keep evenly moist throughout the year, watering roughly every 2-4 days so the medium stays damp | Pet-safe |
| Masdevallia veitchiana | Medium indirect light (a couple of metres from a window) | Keep roots evenly moist year-round; water roughly every 2-4 days so the mix never fully dries | Pet-safe |
| Masdevallia wageneriana | Medium indirect light (a couple of metres from a window) | Keep continuously moist; water or mist every 1-3 days as the tiny mass dries quickly | Pet-safe |
| Maudiae Slipper Orchid | Low light (north window or shaded room) | Every 5–7 days | Pet-safe |
| Maudiae Slipper Orchid | Medium indirect light (a couple of metres from a window) | When the top of the mix begins to dry, roughly every 5-7 days | Pet-safe |
| Maudiae-Type Slipper 'Black Jack' | Medium indirect light (a couple of metres from a window) | When the top of the mix is just starting to dry, roughly every 5-7 days | Mildly toxic to pets |
| Mauna Loa Peace Lily | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14 days in winter | Toxic to pets |
| Maxillaria picta | Medium indirect light (a couple of metres from a window) | Water when the surface dries, about every 4-7 days; reduce somewhat after flowering | Mildly toxic to pets |
| Maxillaria schunkeana | Medium indirect light (a couple of metres from a window) | Water when the surface of the medium approaches dryness, about every 4-6 days, keeping it lightly moist | Mildly toxic to pets |
| Mayapple | Low light (north window or shaded room) | 1–2 times per week during spring; reduce as plant enters summer dormancy | Toxic to pets |
| Maze-Leaf Begonia | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil feels dry | Toxic to pets |
| Medusa Orchid | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water every 2-4 days, more in heat | Pet-safe |
| Meebold's Lagenandra | Low light (north window or shaded room) | Keep permanently moist to fully submerged; never dry out | Toxic to pets |
| Membrane-flowered Stelis | Medium indirect light (a couple of metres from a window) | Every 1–2 days; never allow roots to fully dry | Pet-safe |
| Metallic Blue Fern | Low light (north window or shaded room) | Keep the rhizome and medium lightly moist; water every 4-6 days, allowing the surface to barely dry | Pet-safe |
| Metallic Heliconia | Medium indirect light (a couple of metres from a window) | 2–3 times per week in warm conditions; once weekly in cooler periods | Mildly toxic to pets |
| Metallic Palm | Low light (north window or shaded room) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Metallica Palm | Medium indirect light (a couple of metres from a window) | Every 7–10 days in summer, every 14 days in winter | Pet-safe |
| Mexican Hat Palm | Low light (north window or shaded room) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Micro Earth Star | Medium indirect light (a couple of metres from a window) | Water when top 1-2 cm of soil dries, roughly every 5-8 days | Pet-safe |
| Microsorum pteropus | Low light (north window or shaded room) | Submerged aquatic; keep continuously underwater with a 25-30% water change weekly | Mildly toxic to pets |
| Microsorum pteropus 'Narrow' | Low light (north window or shaded room) | Continuously submerged; 20-30% aquarium water change weekly | Mildly toxic to pets |
| Microsorum pteropus 'Needle Leaf' | Low light (north window or shaded room) | Continuously submerged; 20-30% aquarium water change weekly | Mildly toxic to pets |
| Microsorum pteropus 'Trident' | Low light (north window or shaded room) | Continuously submerged; 20-30% aquarium water change weekly | Mildly toxic to pets |
| Microsorum pteropus 'Windelov' | Low light (north window or shaded room) | Submerged aquatic; keep continuously underwater with a 25-30% water change weekly | Mildly toxic to pets |
| Miltoniopsis 'Augres' | Medium indirect light (a couple of metres from a window) | Keep evenly moist; usually every 4-6 days | Pet-safe |
| Miltoniopsis 'Herralexandre' | Medium indirect light (a couple of metres from a window) | When the mix surface starts to dry, roughly every 4-6 days | Pet-safe |
| Miltoniopsis 'Red Tide' | Medium indirect light (a couple of metres from a window) | Keep the mix evenly moist; typically every 4-6 days | Pet-safe |
| Miltoniopsis phalaenopsis | Medium indirect light (a couple of metres from a window) | Every 3-5 days, keeping the mix lightly moist at all times | Pet-safe |
| Miltoniopsis roezlii | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water every 3-5 days, never letting the mix fully dry | Pet-safe |
| Miniature Creeping Jenny | Medium indirect light (a couple of metres from a window) | Frequently; keep soil consistently moist | Mildly toxic to pets |
| Minnesota Trout Lily | Medium indirect light (a couple of metres from a window) | Moist throughout active growth (April–May); bone-dry conditions are fatal | Mildly toxic to pets |
| Minute Masdevallia | Medium indirect light (a couple of metres from a window) | Every 2–3 days; keep medium consistently moist | Pet-safe |
| Minuteman Hosta | Low light (north window or shaded room) | When the top 2-3cm of soil is dry, about every 5-7 days in the growing season | Toxic to pets |
| Miss Sharples Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 4–6 days; maintain consistent soil moisture | Pet-safe |
| Modest Cape Primrose | Medium indirect light (a couple of metres from a window) | Every 7-10 days in growth; every 3-4 weeks in winter | Pet-safe |
| Mondo Grass | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Monkey flower | Medium indirect light (a couple of metres from a window) | Every 2–3 days; more frequently in warm or windy weather | Pet-safe |
| Monosolenium tenerum | Medium indirect light (a couple of metres from a window) | Permanently submerged; 25-40% water change weekly | Mildly toxic to pets |
| Monstera Obliqua Peru | Medium indirect light (a couple of metres from a window) | Keep evenly, lightly moist; check every 4-7 days | Toxic to pets |
| Moore's Blechnum | Medium indirect light (a couple of metres from a window) | Every 5–7 days in summer, every 10–14 days in winter | Pet-safe |
| Mosaic Bromeliad | Medium indirect light (a couple of metres from a window) | Top up the central urn weekly; water the potting mix every 2–3 weeks | Pet-safe |
| Mosaic Vase Plant | Medium indirect light (a couple of metres from a window) | Keep urn filled; water medium every 10–14 days | Pet-safe |
| Moss-dwelling Specklinia | Medium indirect light (a couple of metres from a window) | Daily misting if mounted; every 1–2 days if potted | Pet-safe |
| Mossy Porroglossum | Medium indirect light (a couple of metres from a window) | Daily to every other day; never allow the medium to dry out | Pet-safe |
| Mother Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days; keep evenly moist | Pet-safe |
| Mother Fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-6 days | Pet-safe |
| Mottled Wild Ginger | Low light (north window or shaded room) | Every 7–10 days during the growing season; every 14 days once well established | Mildly toxic to pets |
| Mountain Bellwort | Medium indirect light (a couple of metres from a window) | Once per week during the growing season; less frequent than other bellworts owing to this species' preference for drier conditions. | Mildly toxic to pets |
| Mountain Bladder Fern | Low light (north window or shaded room) | 2-3 times per week in active growth; reduce when dormant | Pet-safe |
| Mountain Male Fern | Medium indirect light (a couple of metres from a window) | Every 7–14 days during the growing season; once monthly or less in winter | Mildly toxic to pets |
| Mountain Phlox | Medium indirect light (a couple of metres from a window) | Weekly; allow the top 2–3 cm of soil to dry between waterings | Pet-safe |
| Mourning Holly Fern | Low light (north window or shaded room) | Every 5–7 days in the growing season, every 10–14 days in winter | Pet-safe |
| Naked Bamboo | Medium indirect light (a couple of metres from a window) | 2-3 times per week in growing season; reduce in winter | Pet-safe |
| Nandina Liriope | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Naomi Hakone Grass | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water 1-2 times weekly, more in heat | Mildly toxic to pets |
| Narrow Holly Fern | Medium indirect light (a couple of metres from a window) | Every 7–14 days; drought-tolerant once established | Pet-safe |
| Narrow-Leaf Fountain Bamboo | Medium indirect light (a couple of metres from a window) | 2-3 times per week in warm months; weekly in cool weather | Pet-safe |
| Narrow-leaved Glade Fern | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water when the top 2 cm begin to dry, roughly every 5-7 days in dry weather | Mildly toxic to pets |
| Narrow-Leaved Spleenwort | Low light (north window or shaded room) | Every 2–3 days in warm months; reduce in winter | Pet-safe |
| Natai Palm | Medium indirect light (a couple of metres from a window) | Every 5–7 days in warm conditions; every 14 days in cooler periods | Pet-safe |
| Natal Grass Cycad | Medium indirect light (a couple of metres from a window) | Water when the top 2–3 cm of soil is dry, typically every 1–2 weeks in summer | Toxic to pets |
| Nathalie's Ramonda | Medium indirect light (a couple of metres from a window) | Once or twice a week in the growing season; minimal in winter | Pet-safe |
| Navelwort | Medium indirect light (a couple of metres from a window) | Regularly in autumn–spring growing period; very little in summer dormancy | Mildly toxic to pets |
| Neanthe Bella Palm | Low light (north window or shaded room) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Neat Bulbophyllum | Medium indirect light (a couple of metres from a window) | Every 4–6 days; mounted plants may need more frequent misting | Pet-safe |
| Neon pothos | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, every 7-10 days | Toxic to pets |
| Nesting Masdevallia | Medium indirect light (a couple of metres from a window) | Daily in hot weather; every 2–3 days in cool seasons | Pet-safe |
| Netted Chain Fern | Medium indirect light (a couple of metres from a window) | Keep continuously moist to wet; check every 3-5 days and never allow drying | Mildly toxic to pets |
| Netted Chain Fern | Low light (north window or shaded room) | Freely — keep soil moist to seasonally wet | Pet-safe |
| Nettle-leaved Bellflower | Medium indirect light (a couple of metres from a window) | Moderate — keep consistently moist, especially in summer | Pet-safe |
| Network Calathea | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| New Zealand Snowberry | Medium indirect light (a couple of metres from a window) | Every 7 days during the growing season; reduce in winter | Mildly toxic to pets |
| Nicholas Hakone Grass | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water 1-2 times weekly, more in heat | Mildly toxic to pets |
| Nimmo's Ginger | Medium indirect light (a couple of metres from a window) | Consistently moist during the growing season; reduced but not dry during dormancy. | Mildly toxic to pets |
| Ninja Foamflower | Medium indirect light (a couple of metres from a window) | Every 5–7 days; increase in warm or dry periods | Pet-safe |
| Ninja Tiarella | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water deeply once or twice a week during dry periods | Mildly toxic to pets |
| Nodding Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist to seasonally wet; tolerates more moisture than most Trilliums. | Mildly toxic to pets |
| Norfolk Island Spleenwort | Medium indirect light (a couple of metres from a window) | Every 5–7 days; adjust seasonally | Pet-safe |
| Northern Buckler Fern | Medium indirect light (a couple of metres from a window) | Weekly during the growing season; reduce significantly in winter | Mildly toxic to pets |
| Northern Holly Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days; less in winter | Pet-safe |
| Northern Lady Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days in warm weather; keep soil consistently moist but not waterlogged | Mildly toxic to pets |
| Northern Maidenhair Fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-6 days | Pet-safe |
| Notch-Tipped Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Notched Butterwort | Medium indirect light (a couple of metres from a window) | Keep consistently moist; reduce slightly in cooler months | Mildly toxic to pets |
| Nuttall's Waterweed | Medium indirect light (a couple of metres from a window) | Permanently submerged | Pet-safe |
| Oak-leaf Primulina | Medium indirect light (a couple of metres from a window) | Allow soil to become fairly dry between waterings | Mildly toxic to pets |
| Obscure Begonia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth, every 14 days in cooler months | Toxic to pets |
| Olive Porroglossum | Medium indirect light (a couple of metres from a window) | Water or mist daily in warm months; every 1-2 days in cooler months — roots must never fully dry out | Pet-safe |
| Oliver's impatiens | Medium indirect light (a couple of metres from a window) | Every 4–7 days; moderate and consistent | Pet-safe |
| One-flowered Clintonia | Low light (north window or shaded room) | Maintain consistently moist soil; water deeply when the top 2 cm begins to dry | Mildly toxic to pets |
| Open Dancing Ginger | Medium indirect light (a couple of metres from a window) | 1–2 times per week during growing season; stop in winter | Mildly toxic to pets |
| Orange Queen Epimedium | Medium indirect light (a couple of metres from a window) | Weekly during establishment and dry spells; established clumps are notably drought-tolerant | Mildly toxic to pets |
| Oregon Woodsia | Medium indirect light (a couple of metres from a window) | Water every 7–14 days, less in winter | Pet-safe |
| Oreocharis auricula | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-6 days in growth | Mildly toxic to pets |
| Oriental Chain Fern | Medium indirect light (a couple of metres from a window) | Regularly — keep soil consistently moist | Pet-safe |
| Oriental Ostrich Fern | Low light (north window or shaded room) | Regularly — keep soil consistently moist to moderately dry | Pet-safe |
| Ornate Begonia | Medium indirect light (a couple of metres from a window) | When the top 2 cm of growing medium feels dry | Toxic to pets |
| Ornate Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Orpheus Flower | Medium indirect light (a couple of metres from a window) | Lightly and consistently, keeping the root zone barely moist but never wet | Mildly toxic to pets |
| Osmunda regalis 'Purpurascens' | Medium indirect light (a couple of metres from a window) | Keep soil constantly moist to wet; check every 2-3 days in growth | Mildly toxic to pets |
| Osmunda spectabilis | Medium indirect light (a couple of metres from a window) | Keep wet to consistently moist at all times; water whenever the surface is not damp | Pet-safe |
| Ostbo Red Mountain Laurel | Medium indirect light (a couple of metres from a window) | Regular; maintain even moisture | Toxic to pets |
| Othello Ligularia | Medium indirect light (a couple of metres from a window) | Keep permanently moist; water deeply 2-3 times weekly, daily during heat | Mildly toxic to pets |
| Oxlip | Medium indirect light (a couple of metres from a window) | Regularly; keep soil consistently moist, especially in summer | Mildly toxic to pets |
| Oxycardium | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Pacific Maid Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–3 days; keep evenly moist | Pet-safe |
| Pacific Yew | Low light (north window or shaded room) | Weekly during establishment; every 2 weeks once established | Toxic to pets |
| Pagoda Dogwood | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water deeply weekly in the first two seasons and during droughts | Pet-safe |
| Pagoda Fawn Lily | Medium indirect light (a couple of metres from a window) | Regular during spring growing season; reduce significantly after dormancy | Mildly toxic to pets |
| Painted Begonia | Medium indirect light (a couple of metres from a window) | Every 6–9 days in spring and summer; every 12–16 days in autumn and winter | Toxic to pets |
| Painted Fern 'Burgundy Lace' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to dry, often every 4-7 days | Mildly toxic to pets |
| Painted Fern 'Pewter Lace' | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil starts to dry, often every 4-7 days | Mildly toxic to pets |
| Painted Sonerila | Medium indirect light (a couple of metres from a window) | Every 4–6 days; keep lightly moist but never waterlogged | Pet-safe |
| Painted Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist throughout the growing season; never allow soil to dry out. | Mildly toxic to pets |
| Palace Purple coral bells | Medium indirect light (a couple of metres from a window) | Once or twice per week in growing season; reduce in winter | Pet-safe |
| Pale Yellow Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist through spring; reduce during summer dormancy | Mildly toxic to pets |
| palm sedge | Medium indirect light (a couple of metres from a window) | Consistently moist; water whenever the top 2 cm of soil dries | Pet-safe |
| Palm sedge | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water when the top 1–2 cm of soil dries out | Pet-safe |
| Palmate Begonia | Medium indirect light (a couple of metres from a window) | Every 6–8 days in growing season; reduce to every 10–14 days in winter | Toxic to pets |
| Panda Face Ginger | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; reduce in winter | Mildly toxic to pets |
| Pansy Orchid | Medium indirect light (a couple of metres from a window) | When the surface of the mix begins to dry, roughly every 4-6 days | Pet-safe |
| Paphiopedilum 'Pinocchio' | Medium indirect light (a couple of metres from a window) | Every 4-7 days; keep evenly moist | Pet-safe |
| Paphiopedilum bellatulum | Medium indirect light (a couple of metres from a window) | Every 5-8 days; keep lightly moist, never waterlogged | Pet-safe |
| Paphiopedilum malipoense | Medium indirect light (a couple of metres from a window) | Every 4-7 days; keep evenly moist, never bone-dry | Pet-safe |
| Paphiopedilum venustum | Medium indirect light (a couple of metres from a window) | Every 4-7 days; keep evenly moist | Pet-safe |
| Paraboea rufescens | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 6-9 days | Mildly toxic to pets |
| Parlor palm | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, every 7-10 days | Pet-safe |
| Parlour Palm | Medium indirect light (a couple of metres from a window) | Every 7–10 days in spring and summer; every 14–21 days in winter | Pet-safe |
| Partridgeberry | Low light (north window or shaded room) | Keep soil evenly moist; water when the top 1–2 cm begins to dry | Pet-safe |
| Paul's Glory Hosta | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Toxic to pets |
| Peace lily | Medium indirect light (a couple of metres from a window) | As soon as the leaves start to droop slightly, usually every 5-7 days | Toxic to pets |
| Peacock fern | Low light (north window or shaded room) | Keep the substrate evenly moist at all times — never let it dry out | Pet-safe |
| Peacock Ginger | Medium indirect light (a couple of metres from a window) | Regular during active growth; none during winter dormancy | Pet-safe |
| Peacock Plant | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of compost dries; roughly weekly | Pet-safe |
| Peacock Plant | Medium indirect light (a couple of metres from a window) | Roughly weekly; when the top 2-3 cm of compost dries | Pet-safe |
| Pellionia daveauana | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to dry, often every 4-7 days | Pet-safe |
| Peltate-Leaf Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days during the growing season; every 3–4 weeks in winter | Pet-safe |
| Pencilled Cranesbill | Medium indirect light (a couple of metres from a window) | Occasional watering during establishment; largely self-sufficient once established | Pet-safe |
| Pendulous Homalomena | Low light (north window or shaded room) | Every 7–12 days in summer; every 14–18 days in winter | Toxic to pets |
| Pennsylvania Sedge | Medium indirect light (a couple of metres from a window) | Water to establish, then largely self-sufficient; occasional deep watering in extended drought | Mildly toxic to pets |
| Peperomia | Medium indirect light (a couple of metres from a window) | When the soil is almost fully dry, every 10-14 days | Pet-safe |
| Peperomia 'Frost' | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, typically every 7-10 days | Pet-safe |
| Peperomia caperata 'Rosso' | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, typically every 7-10 days | Pet-safe |
| Pereskia-Leaf Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Perfoliate Bellwort | Medium indirect light (a couple of metres from a window) | Moderate in spring; established plants are drought-tolerant once dormant. | Pet-safe |
| Persian Barrenwort | Medium indirect light (a couple of metres from a window) | Weekly for the first 1–2 seasons; established plants need watering only during extreme drought | Mildly toxic to pets |
| Phegopteris connectilis | Low light (north window or shaded room) | Keep soil evenly moist; water when the top 1-2 cm begins to dry, roughly every 4-6 days in growth | Pet-safe |
| Phegopteris hexagonoptera | Low light (north window or shaded room) | Keep consistently moist; water when the surface starts to dry, about every 4-6 days during growth | Pet-safe |
| Philodendron | Medium indirect light (a couple of metres from a window) | When the top 3 cm of soil is dry, every 7-10 days | Toxic to pets |
| Philodendron Brasil | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, every 7-10 days | Toxic to pets |
| Philodendron Deja Vu | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, about weekly | Toxic to pets |
| Philodendron hederaceum 'Micans' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Philodendron scandens | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Philodendron Wendlandii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm (1 in) of soil is dry, roughly every 7-10 days | Toxic to pets |
| Pilea aquarum | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water when the surface just begins to dry, roughly every 3-5 days | Pet-safe |
| Pilea pumila | Medium indirect light (a couple of metres from a window) | Keep consistently moist; check every 2-4 days | Pet-safe |
| Pineapple Upsidedown Cake Hosta | Low light (north window or shaded room) | When the top 2-3cm of soil is dry, about every 5-7 days during active growth | Toxic to pets |
| Pineapple-Head Ginger | Medium indirect light (a couple of metres from a window) | Regular during the growing season; reduce in winter but do not allow complete drydown. | Mildly toxic to pets |
| Pink Allusion Arrowhead Plant | Medium indirect light (a couple of metres from a window) | Every 7–10 days; allow the top 2–3 cm of soil to dry between waterings | Toxic to pets |
| Pink Arisaema | Low light (north window or shaded room) | Keep moist through the growing season once growth appears, watering when the surface dries; reduce sharply as the leaf dies back to dormancy. | Toxic to pets |
| Pink Fawn Lily | Medium indirect light (a couple of metres from a window) | Regular watering in spring; minimal to none during summer dormancy | Mildly toxic to pets |
| Pink Fittonia | Medium indirect light (a couple of metres from a window) | When the top 1 cm of soil is just barely dry, often every 3-5 days | Pet-safe |
| Pink Panther Restrepia | Medium indirect light (a couple of metres from a window) | Every 1–2 days; allow the medium to approach dryness but not fully dry | Pet-safe |
| Pink Pewter Dead Nettle | Medium indirect light (a couple of metres from a window) | Every 7–10 days; increase in dry or sunny spells | Pet-safe |
| Pink Skyrocket Foamflower | Medium indirect light (a couple of metres from a window) | Once or twice per week during the growing season; reduce in autumn and winter. | Mildly toxic to pets |
| Pink Spur Flower | Medium indirect light (a couple of metres from a window) | Moderate — water when top 3 cm of soil dries out | Mildly toxic to pets |
| Pinnate Primulina | Medium indirect light (a couple of metres from a window) | Every 7–10 days, allowing the top 2 cm of soil to dry between waterings | Mildly toxic to pets |
| Pipsissewa | Low light (north window or shaded room) | Sparingly — allow soil to dry almost completely between waterings; low water requirement | Mildly toxic to pets |
| Pitcher Sage | Medium indirect light (a couple of metres from a window) | Every 2–4 weeks once established; deep water at planting | Mildly toxic to pets |
| Plane-leaf Begonia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in spring and summer; every 14–18 days in winter | Toxic to pets |
| Plantain-Leaved Sedge | Low light (north window or shaded room) | Keep soil consistently moist; do not allow to dry out | Pet-safe |
| Pleasant Lembocarpus | Low light (north window or shaded room) | Keep substrate consistently moist during the growing season; withhold water during dormancy | Pet-safe |
| Pleated Snowdrop | Medium indirect light (a couple of metres from a window) | Weekly during active growth (late winter–spring); minimal in summer dormancy | Toxic to pets |
| Pleurothallis grobyi | Low light (north window or shaded room) | Keep roots evenly moist; water every 2-3 days potted, or mist/water mounted plants daily | Mildly toxic to pets |
| Pleurothallis restrepioides | Low light (north window or shaded room) | Keep evenly moist, watering roughly every 2-3 days; do not allow a hard dry-out | Mildly toxic to pets |
| Pleurothallis truncata | Low light (north window or shaded room) | Keep evenly moist; water every 2-3 days potted or mist mounted plants daily | Mildly toxic to pets |
| Plum Pudding Heuchera | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about weekly | Pet-safe |
| Plumose Shield Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days in active growth; every 10–14 days in winter | Pet-safe |
| Plumose Soft Shield Fern | Medium indirect light (a couple of metres from a window) | Regular; keep moist but well-drained | Pet-safe |
| Pochutla Chamaedorea | Medium indirect light (a couple of metres from a window) | Every 7–14 days (allow top 2 in to dry between waterings) | Pet-safe |
| Podophylla Rodgersia | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply 1-2 times weekly, more in heat | Mildly toxic to pets |
| Pointed-Cap Ginger | Medium indirect light (a couple of metres from a window) | Regularly; maintain consistently moist soil year-round | Mildly toxic to pets |
| Poiret's Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 3–4 days in summer, every 5–7 days in winter | Pet-safe |
| Poison Lagenandra | Medium indirect light (a couple of metres from a window) | Keep roots permanently moist or submerged; do not allow to dry out | Toxic to pets |
| Poke Milkweed | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water during dry spells, especially in sunnier sites | Toxic to pets |
| Polypody Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of medium is dry, roughly every 7-10 days | Pet-safe |
| Polystichum aculeatum | Low light (north window or shaded room) | Keep soil consistently moist; water every 5-7 days in dry spells once established | Pet-safe |
| Polystichum makinoi | Low light (north window or shaded room) | Keep evenly moist; water every 5-7 days during dry weather | Pet-safe |
| Polystichum neolobatum | Low light (north window or shaded room) | Keep consistently moist; water every 5-7 days in dry conditions | Pet-safe |
| Polystichum setiferum 'Divisilobum' | Low light (north window or shaded room) | Keep evenly moist; water deeply during dry spells, roughly weekly in summer | Pet-safe |
| Polystichum setiferum 'Plumosum Densum' | Low light (north window or shaded room) | Keep evenly moist; water deeply during dry spells, roughly weekly in summer | Pet-safe |
| Portella Ruellia | Medium indirect light (a couple of metres from a window) | Every 5–7 days during the growing season; reduce in winter | Mildly toxic to pets |
| Pothos | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, every 7-10 days | Toxic to pets |
| Pothos 'Shangri La' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| Pothos Happy Leaf | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, about every 7-14 days | Toxic to pets |
| Pothos-leaf Labisia | Low light (north window or shaded room) | Water when the top 1–2 cm of medium begins to dry; every 4–7 days depending on temperature and pot size | Mildly toxic to pets |
| Pouch Flower | Medium indirect light (a couple of metres from a window) | When the top of the compost begins to feel barely dry | Mildly toxic to pets |
| Prairie Trillium | Medium indirect light (a couple of metres from a window) | Water regularly to keep soil evenly moist during spring growing season; reduce significantly once dormant in midsummer | Mildly toxic to pets |
| Prayer plant | Medium indirect light (a couple of metres from a window) | When the top 1 cm of soil is just dry, every 4-6 days | Pet-safe |
| Pretty Peacock Ginger | Medium indirect light (a couple of metres from a window) | Regular during the growing season (spring to autumn); minimal to none in winter | Pet-safe |
| Prickly Shield Fern | Medium indirect light (a couple of metres from a window) | Weekly; drought-tolerant once established | Pet-safe |
| Primrose | Medium indirect light (a couple of metres from a window) | Weekly watering | Pet-safe |
| Primrose-Flower Begonia | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of compost begins to dry, roughly every 5-8 days in growth | Toxic to pets |
| primrose-leaf cape primrose | Medium indirect light (a couple of metres from a window) | Every 7–10 days; keep evenly moist but never waterlogged | Pet-safe |
| Primrose-leaf Streptocarpus | Medium indirect light (a couple of metres from a window) | every 5–8 days in the growing season, every 10–14 days in winter | Pet-safe |
| Prince Masdevallia | Medium indirect light (a couple of metres from a window) | Daily to every 2 days; medium should remain evenly moist at all times | Pet-safe |
| Przewalskii Ligularia | Medium indirect light (a couple of metres from a window) | Keep constantly moist; water deeply 2-3 times weekly, more in heat | Mildly toxic to pets |
| pubescent bladderwort | Medium indirect light (a couple of metres from a window) | Keep media permanently moist; do not allow to dry out | Pet-safe |
| Purple Bugle | Medium indirect light (a couple of metres from a window) | Moderate; consistent moisture preferred | Mildly toxic to pets |
| Purple Cyclamen | Medium indirect light (a couple of metres from a window) | Low in summer, moderate during active growth (late summer to spring) | Toxic to pets |
| Purple Dragon Dead Nettle | Medium indirect light (a couple of metres from a window) | Every 7–10 days; water more frequently in hot, dry periods | Pet-safe |
| Purple Heartleaf Bergenia | Medium indirect light (a couple of metres from a window) | Every 7–10 days during active growth; minimal in winter | Pet-safe |
| Purple Royal Fern | Medium indirect light (a couple of metres from a window) | Freely and consistently — never allow to dry out | Pet-safe |
| Purple Stelis | Medium indirect light (a couple of metres from a window) | Every 2–3 days in active growth; reduce slightly in cooler months | Pet-safe |
| Pyrenean Ramonda | Medium indirect light (a couple of metres from a window) | Once or twice a week in the growing season; minimal in winter | Pet-safe |
| Queen of Hearts Plant | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14 days in winter | Toxic to pets |
| Quila Bamboo | Medium indirect light (a couple of metres from a window) | Weekly to twice weekly during growing season; reduce in winter | Pet-safe |
| Raceme Dancing Ginger | Medium indirect light (a couple of metres from a window) | 1–2 times per week in active growth; stop in winter | Mildly toxic to pets |
| Raceme Masdevallia | Medium indirect light (a couple of metres from a window) | Daily or every 1-2 days; medium should not dry out between waterings | Pet-safe |
| Radicalis Palm | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growing season; every 14–21 days in winter | Pet-safe |
| Rainbow Leucothoe | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; do not allow to dry out | Toxic to pets |
| Raja Begonia | Medium indirect light (a couple of metres from a window) | Keep the compost consistently lightly moist; check every 3-5 days | Toxic to pets |
| Raspberry Splash Pulmonaria | Low light (north window or shaded room) | Keep soil evenly moist; water every 4-6 days in dry conditions, more in pots | Mildly toxic to pets |
| Rattlesnake Fern | Medium indirect light (a couple of metres from a window) | Moderate — consistently moist but never waterlogged | Mildly toxic to pets |
| Rattlesnake Plant | Medium indirect light (a couple of metres from a window) | Every 7–10 days in spring/summer; every 10–14 days in autumn/winter | Pet-safe |
| Rattlesnake Plant | Medium indirect light (a couple of metres from a window) | Water when the top 2-3 cm of soil is just dry, roughly every 5-7 days | Pet-safe |
| Raven ZZ Plant | Low light (north window or shaded room) | Every 2–4 weeks in growing season; every 4–6 weeks in winter | Toxic to pets |
| Recurved Leucothoe | Medium indirect light (a couple of metres from a window) | Regularly; maintain consistently moist soil throughout the growing season | Toxic to pets |
| Red Arrow Arrowhead Vine | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth; every 10–14 days in winter | Toxic to pets |
| Red Baneberry | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season; weekly when dormant | Toxic to pets |
| Red Barrenwort | Medium indirect light (a couple of metres from a window) | Weekly during establishment; established plants need watering only during extended summer drought | Mildly toxic to pets |
| Red Beauty Japanese Painted Fern | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season, reduce in winter | Pet-safe |
| Red Campion | Medium indirect light (a couple of metres from a window) | Moderate; keep moist | Mildly toxic to pets |
| Red Fittonia | Medium indirect light (a couple of metres from a window) | When the top 1 cm of soil is just barely dry, often every 3-5 days | Pet-safe |
| Red Groove Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 2–3 weeks in winter | Pet-safe |
| red nerve plant | Medium indirect light (a couple of metres from a window) | Every 5–10 days; water when top 1–2 cm of soil is dry | Pet-safe |
| Red Sentinel Astilbe | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water every 3-5 days in summer, more in heat or containers | Pet-safe |
| Red Spiral Ginger | Medium indirect light (a couple of metres from a window) | Freely in growing season; sparingly in winter | Mildly toxic to pets |
| Red Trillium | Medium indirect light (a couple of metres from a window) | Weekly during spring; reduce as plant goes dormant in midsummer | Mildly toxic to pets |
| Red-bristled Dragon Orchid | Medium indirect light (a couple of metres from a window) | Every 2–3 days; roots must not dry out | Pet-safe |
| Red-Leaved Spiral Ginger | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water when the top 1–2 cm of soil begins to feel dry. | Mildly toxic to pets |
| Red-petal Lepanthes | Medium indirect light (a couple of metres from a window) | Daily misting or watering every 1-2 days; never allow to dry | Pet-safe |
| Red-stemmed Sensitive Fern | Medium indirect light (a couple of metres from a window) | Keep soil continuously moist to wet; water every 2–3 days or more in dry spells | Mildly toxic to pets |
| Regel's Nidularium | Medium indirect light (a couple of metres from a window) | Weekly cup refill; medium barely moist | Pet-safe |
| Reichenbach's Masdevallia | Medium indirect light (a couple of metres from a window) | Daily in warm weather; every 2–3 days in cooler months | Pet-safe |
| Related Columnea | Medium indirect light (a couple of metres from a window) | When top 2–3 cm of mix dries | Pet-safe |
| Repandens Yew | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, roughly weekly while establishing | Toxic to pets |
| Restrepia antennifera | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water every 2-3 days so the medium never dries out fully | Pet-safe |
| Restrepia elegans | Medium indirect light (a couple of metres from a window) | Keep the medium consistently moist; water every 2-3 days, never allowing it to dry out | Pet-safe |
| Restrepia guttulata | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water every 2-3 days, never letting the medium dry out | Pet-safe |
| Restrepia-mimic Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 5–7 days (potted); near-daily misting if mounted | Pet-safe |
| Restrepo's Chigua | Medium indirect light (a couple of metres from a window) | Every 7–10 days; ensure consistent moisture without waterlogging | Toxic to pets |
| Resurrection fern | Medium indirect light (a couple of metres from a window) | Mist or moisten every 2-4 days; let it dry between | Mildly toxic to pets |
| Resurrection Gesneriad | Medium indirect light (a couple of metres from a window) | Once a week in the growing season; sparingly in winter | Pet-safe |
| Resurrection Lily | Medium indirect light (a couple of metres from a window) | Every 5–7 days during the growing season; withhold almost completely in winter dormancy | Pet-safe |
| Reunion Island Begonia | Medium indirect light (a couple of metres from a window) | When the top 2 cm of compost feels dry, approximately every 7 days | Toxic to pets |
| Revolution Hosta | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; deep watering 1-2 times weekly | Toxic to pets |
| Rhapis Multifida | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Rhapis Subtilis | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Ribes Lepanthes | Medium indirect light (a couple of metres from a window) | Daily misting; substrate must remain moist at all times | Pet-safe |
| Richard's Shield Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days; adjust seasonally | Pet-safe |
| Ridleyandra sp. | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of mix is just drying, roughly every 4-7 days | Mildly toxic to pets |
| River Water Fern | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; check every 3-5 days | Mildly toxic to pets |
| Rochford's Holly Fern | Low light (north window or shaded room) | Every 7–10 days; less in winter | Pet-safe |
| Rock Polypody | Medium indirect light (a couple of metres from a window) | Low to moderate — allow to dry slightly between waterings | Pet-safe |
| Rocky Mountain Woodsia | Medium indirect light (a couple of metres from a window) | Water when the top 2–3 cm of medium feel dry | Pet-safe |
| Rodent Tuber | Medium indirect light (a couple of metres from a window) | Consistently moist during growing season; reduce in dormancy | Toxic to pets |
| Rodgersia Pinnata | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply 1-2 times weekly, more in heat | Mildly toxic to pets |
| Roezl's Dragon Orchid | Medium indirect light (a couple of metres from a window) | Daily or every other day; medium must never fully dry | Pet-safe |
| Rolfe's Masdevallia | Medium indirect light (a couple of metres from a window) | Every 1–2 days in summer; every 2–3 days in winter | Pet-safe |
| Roosevelt Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days in the growing season, less in winter | Pet-safe |
| Rose Queen Barrenwort | Medium indirect light (a couple of metres from a window) | Water weekly until established; thereafter drought-tolerant, needing only occasional watering during prolonged dry spells | Mildly toxic to pets |
| Rose Queen Epimedium | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly weekly | Mildly toxic to pets |
| Rosette Petrocosmea | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth; minimal in winter | Pet-safe |
| Rothschild's Bulbophyllum | Medium indirect light (a couple of metres from a window) | Keep evenly moist in growth; water every 3-5 days | Pet-safe |
| Rough Chervil | Medium indirect light (a couple of metres from a window) | Moderate — rainfall-dependent | Toxic to pets |
| Rough Columnea | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; every 10–14 days in winter | Pet-safe |
| Rough Pellionia | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; reduce to every 10–14 days in winter | Pet-safe |
| Round-Leaf Calathea | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growing season; every 10–14 days in winter | Pet-safe |
| Round-Leaf Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days (allow top 2–3 cm to dry) | Pet-safe |
| Round-Leaved Rhoogeton | Low light (north window or shaded room) | Every 4–6 days; keep substrate consistently moist | Pet-safe |
| Round-leaved Wintergreen | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water whenever the top 1–2 cm of soil begins to dry | Mildly toxic to pets |
| Round-lobed Hepatica | Medium indirect light (a couple of metres from a window) | Every 5–7 days during active growth; minimal in summer dormancy | Mildly toxic to pets |
| Rowlee's Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 1–2 days in summer; every 2–4 days in cooler months | Pet-safe |
| Roxburgh's Typhonium | Medium indirect light (a couple of metres from a window) | Moderate during growing season; withhold in dormancy | Toxic to pets |
| Royal Fern | Medium indirect light (a couple of metres from a window) | Keep soil constantly moist; water whenever the surface starts to dry, often 2-3 times a week in growth | Mildly toxic to pets |
| Royal Purple Lilyturf | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Rubrum Epimedium | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 1-2 weeks | Mildly toxic to pets |
| Running Tapestry Foamflower | Medium indirect light (a couple of metres from a window) | Every 5–7 days; more during summer drought | Pet-safe |
| Running Tapestry Tiarella | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply once or twice weekly in dry spells | Mildly toxic to pets |
| Rusty Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in spring and summer; every 2–3 weeks in autumn and winter | Pet-safe |
| Sabin's Strobilanthes | Medium indirect light (a couple of metres from a window) | 2–3 times weekly in summer; reduce to once weekly in winter | Mildly toxic to pets |
| Sagae Hosta | Low light (north window or shaded room) | When the top 2-3cm of soil is dry, roughly every 5-7 days in the growing season | Toxic to pets |
| Sagittaria platyphylla | Medium indirect light (a couple of metres from a window) | Fully submerged; 30-50% aquarium water change weekly | Mildly toxic to pets |
| Salal | Low light (north window or shaded room) | Moderate; established plants are drought-tolerant but prefer moist conditions | Pet-safe |
| Sansevieria Black Coral | Low light (north window or shaded room) | When the soil is fully dry, roughly every 2-3 weeks | Toxic to pets |
| Sansevieria Hahnii | Low light (north window or shaded room) | When the soil is fully dry, roughly every 2-3 weeks | Toxic to pets |
| Sansevieria Hyacinthoides | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks in summer and monthly in winter | Toxic to pets |
| Sansevieria Intermedia | Medium indirect light (a couple of metres from a window) | When the soil is completely dry, about every 2-3 weeks in summer and monthly in winter | Toxic to pets |
| Sansevieria Laurentii | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks; less in winter | Toxic to pets |
| Sansevieria Moonshine | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks; less in winter | Toxic to pets |
| Sansevieria Nilotica | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, about every 2-3 weeks in summer and monthly in winter | Toxic to pets |
| Sansevieria Parva | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is fully dry, roughly every 10-14 days in summer | Toxic to pets |
| Sansevieria Powellii | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, about every 2-3 weeks in summer and every 4-6 weeks in winter | Toxic to pets |
| Sansevieria Robusta | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, about every 2-3 weeks in summer and monthly in winter | Toxic to pets |
| Sansevieria Trifasciata Black Gold | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks (less in winter) | Toxic to pets |
| Sansevieria Trifasciata Futura Robusta | Low light (north window or shaded room) | When the soil is fully dry, roughly every 2-4 weeks | Toxic to pets |
| Sansevieria Trifasciata Jade Marginata | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks | Toxic to pets |
| Sansevieria Trifasciata Laurentii Superba | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks | Toxic to pets |
| Sansevieria Trifasciata Night Owl | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks | Toxic to pets |
| Sansevieria Trifasciata Robusta | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, every 2-4 weeks (less in winter) | Toxic to pets |
| Sansevieria Trifasciata Sensation | Medium indirect light (a couple of metres from a window) | When soil is fully dry, roughly every 2-3 weeks (less in winter) | Toxic to pets |
| Sansevieria Trifasciata Superba | Medium indirect light (a couple of metres from a window) | When soil is fully dry, roughly every 2-3 weeks (less in winter) | Toxic to pets |
| Sansevieria Trifasciata Twist | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks | Toxic to pets |
| Sansevieria Trifasciata Whitney | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks | Toxic to pets |
| Sarcococca confusa | Low light (north window or shaded room) | Water regularly to establish; afterwards every 7-14 days during dry spells | Mildly toxic to pets |
| Sarcococca Humilis | Low light (north window or shaded room) | Water regularly to establish; thereafter every 7-14 days in prolonged dry spells | Mildly toxic to pets |
| Sarpagandha | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; reduce in cooler months | Toxic to pets |
| Scaly Male Fern | Low light (north window or shaded room) | Keep soil moist; water in dry spells, especially while establishing | Mildly toxic to pets |
| Scaly-Stemmed Holly Fern | Low light (north window or shaded room) | Every 5–8 days in growing season, every 10–14 days in winter | Pet-safe |
| Scarlet Leucothoe | Medium indirect light (a couple of metres from a window) | Regular; maintain consistent moisture | Toxic to pets |
| Scarlet Star Bromeliad | Medium indirect light (a couple of metres from a window) | Fill the central urn weekly; water the potting mix every 2–3 weeks, allowing it to approach dryness between applications | Pet-safe |
| Scarletta Leucothoe | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; do not allow soil to dry | Toxic to pets |
| Schiede's goldfish plant | Medium indirect light (a couple of metres from a window) | Water when the top 2 cm of soil dries out — approximately every 7–10 days in summer, every 10–14 days in winter. | Pet-safe |
| Schismatoglottis Calyptrata | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days, keeping it evenly moist | Toxic to pets |
| Schismatoglottis Motleyana | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days, keeping it evenly moist | Toxic to pets |
| Schismatoglottis Prietoi | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil begins to dry, roughly every 5-7 days | Toxic to pets |
| Schismatoglottis Wallichii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days, keeping it evenly moist | Toxic to pets |
| Schomburgk's Dancing Ginger | Medium indirect light (a couple of metres from a window) | Abundantly during active growth (spring to autumn); reduce to once weekly when dormant | Mildly toxic to pets |
| Scindapsus aureus | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Scindapsus Pictus Jade Satin | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| Scot's Maidenhair Spleenwort | Medium indirect light (a couple of metres from a window) | Keep the gritty mix lightly and evenly moist; water when the surface starts to dry | Pet-safe |
| Sea Spleenwort | Medium indirect light (a couple of metres from a window) | When the top 1–2 cm of growing medium feels dry | Pet-safe |
| Seersucker Plant | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-9 days | Mildly toxic to pets |
| Sensation Peace Lily | Medium indirect light (a couple of metres from a window) | Every 7–10 days in spring and summer; every 14 days in autumn and winter | Toxic to pets |
| Sensitive Fern | Medium indirect light (a couple of metres from a window) | Keep continuously moist to wet; check every 2-3 days | Mildly toxic to pets |
| Sessile Bellwort | Medium indirect light (a couple of metres from a window) | Moderate; keep soil moist in spring and early summer. Tolerates periodic dryness once established. | Pet-safe |
| Sessile Elatostema | Low light (north window or shaded room) | Every 3–5 days; substrate should remain consistently moist | Pet-safe |
| Sessile-leaved Bellwort | Medium indirect light (a couple of metres from a window) | Once or twice per week during the growing season; minimal watering needed once the plant enters summer dormancy. | Mildly toxic to pets |
| Shadow Adromischus | Medium indirect light (a couple of metres from a window) | Every 2–3 weeks in the active season; monthly in winter | Pet-safe |
| Shaggy Shield Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 4-7 days | Mildly toxic to pets |
| Shaggy Wood Fern | Medium indirect light (a couple of metres from a window) | Regular; keep moist but not waterlogged | Pet-safe |
| Shallon | Medium indirect light (a couple of metres from a window) | Moderate; drought-tolerant once established | Mildly toxic to pets |
| Sharp-lobed Begonia | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; less in winter | Toxic to pets |
| Sharp-lobed Hepatica | Medium indirect light (a couple of metres from a window) | Every 5–7 days in spring; reduced to every 10–14 days in summer | Mildly toxic to pets |
| Sharp-Lobed Shield Fern | Medium indirect light (a couple of metres from a window) | Every 7–10 days; reduce in winter | Pet-safe |
| Sharp-tipped Lepanthes | Medium indirect light (a couple of metres from a window) | Daily or every 2 days; keep roots consistently moist | Pet-safe |
| Shining Nidularium | Medium indirect light (a couple of metres from a window) | Refill central cup weekly; substrate every 10–14 days | Pet-safe |
| Shining Temple Bells | Medium indirect light (a couple of metres from a window) | Every 3–4 days during active growth; none during winter dormancy | Mildly toxic to pets |
| Shiny Catopsis | Medium indirect light (a couple of metres from a window) | Maintain 1-2 cm of water in the central cup; refresh every 5-7 days | Pet-safe |
| Shoestring Fern | Low light (north window or shaded room) | Keep the mount or medium consistently moist; mist or water every 2-4 days | Pet-safe |
| Short-Frond Lady Fern | Low light (north window or shaded room) | Every 2–3 days; keep consistently moist | Pet-safe |
| Short-fronded Ceratozamia | Medium indirect light (a couple of metres from a window) | Every 2–4 weeks | Toxic to pets |
| Short-stemmed Restrepia | Medium indirect light (a couple of metres from a window) | Every 2–4 days; medium kept evenly moist | Pet-safe |
| Siberian Carpet Cypress | Medium indirect light (a couple of metres from a window) | Moderate — once established, largely drought-tolerant | Mildly toxic to pets |
| Siberian Lady Fern | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water when the top 2 cm begin to dry, roughly weekly in dry weather | Mildly toxic to pets |
| Siebold's Wood Fern | Medium indirect light (a couple of metres from a window) | Moderate; allow slight drying between waterings once established | Pet-safe |
| Sierra laurel | Medium indirect light (a couple of metres from a window) | Frequently; keep consistently moist | Toxic to pets |
| Sierra Leucothoe | Medium indirect light (a couple of metres from a window) | Regularly; do not allow to dry out between waterings | Toxic to pets |
| Silky Petrocosmea | Medium indirect light (a couple of metres from a window) | Every 10–14 days in growth; very sparingly in winter | Pet-safe |
| Silver Brake Fern | Medium indirect light (a couple of metres from a window) | Twice weekly in summer; weekly in winter | Pet-safe |
| Silver Goosefoot Plant | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growth; every 10–14 days in winter | Toxic to pets |
| Silver Light Bergenia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; reduce in autumn and winter | Pet-safe |
| Silvery Glade Fern | Low light (north window or shaded room) | Every 4–6 days in summer, every 8–12 days in winter | Pet-safe |
| Silvery Stelis | Medium indirect light (a couple of metres from a window) | Every 1–2 days; keep medium consistently moist | Pet-safe |
| Simple-leaf astilbe | Medium indirect light (a couple of metres from a window) | Consistently moist — water 2–3 times per week in dry spells | Pet-safe |
| Single-Leaf Begonia | Medium indirect light (a couple of metres from a window) | Every 7–10 days (keep compost evenly moist but never waterlogged) | Toxic to pets |
| Sinomiyama Toad Lily | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water when the surface begins to dry, often twice weekly in summer | Mildly toxic to pets |
| Sissinghurst White Pulmonaria | Low light (north window or shaded room) | Keep soil evenly moist; water every 4-6 days in dry weather, more in containers | Mildly toxic to pets |
| Skimmia japonica Kew White | Medium indirect light (a couple of metres from a window) | Maintain consistently moist soil; water deeply every 5-7 days in dry weather | Mildly toxic to pets |
| Skimmia japonica Rubella | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water deeply every 5-7 days in dry spells, less in cool months | Mildly toxic to pets |
| Skimmia Pabella | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply every 5-7 days in dry spells | Mildly toxic to pets |
| Skimmia Temptation | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water deeply every 5-7 days during dry periods | Mildly toxic to pets |
| Skinner's Zamia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14–21 days in cooler periods | Toxic to pets |
| Slanted Air Plant | Medium indirect light (a couple of metres from a window) | Mist 3–4 times per week; soak in cool water for 15–20 minutes every 5–7 days. | Pet-safe |
| Slender Lady Palm | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about every 7-10 days | Pet-safe |
| Slender Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–4 days in active growth; every 4–6 days in winter | Pet-safe |
| Slender Sonerila | Medium indirect light (a couple of metres from a window) | Every 5–7 days; maintain consistent moisture without saturation | Pet-safe |
| Small Cape Primrose | Medium indirect light (a couple of metres from a window) | every 7–10 days in the growing season, every 14–21 days in winter | Pet-safe |
| Small Solomon's Seal | Low light (north window or shaded room) | Every 5-7 days in active growth; drought-tolerant once established | Toxic to pets |
| Small Teasel | Medium indirect light (a couple of metres from a window) | Regular; keep soil reliably moist | Mildly toxic to pets |
| Small-flowered alumroot | Medium indirect light (a couple of metres from a window) | Weekly during the growing season; do not allow to dry out completely | Pet-safe |
| Small-flowered Cape Primrose | Medium indirect light (a couple of metres from a window) | Every 7-10 days in active growth; every 3 weeks in winter | Pet-safe |
| Smith's Fairybells | Medium indirect light (a couple of metres from a window) | Weekly during the growing season; reduce in winter dormancy | Mildly toxic to pets |
| Smooth Solomon's Seal | Medium indirect light (a couple of metres from a window) | Regular; keep soil evenly moist | Mildly toxic to pets |
| Snake plant | Medium indirect light (a couple of metres from a window) | When the soil is bone dry, every 2-3 weeks | Toxic to pets |
| Snap Ginger | Medium indirect light (a couple of metres from a window) | Regularly during the growing season; reduce in winter | Mildly toxic to pets |
| Snow Trillium | Medium indirect light (a couple of metres from a window) | Moderate during spring growth; dry summer dormancy | Mildly toxic to pets |
| Snowberry Heath | Medium indirect light (a couple of metres from a window) | Regularly; maintain consistently moist but not waterlogged soil | Pet-safe |
| Snowy Woodrush | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season | Pet-safe |
| Soconusco Zamia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in growing season; every 3–4 weeks in winter | Toxic to pets |
| Sodiros Monopyle | Low light (north window or shaded room) | Every 4–6 days; keep substrate evenly moist | Pet-safe |
| Soft Shield Fern | Low light (north window or shaded room) | When the top 2-3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Soft Tree Fern | Medium indirect light (a couple of metres from a window) | Keep the trunk and root zone consistently moist; water into the crown and down the trunk every few days in warm weather | Mildly toxic to pets |
| soft-leaf primulina | Medium indirect light (a couple of metres from a window) | Every 7–12 days in spring–summer; every 14–21 days in winter | Pet-safe |
| Solomon's Seal | Low light (north window or shaded room) | Every 5-7 days in active growth; less frequent once established | Toxic to pets |
| Southern Lady Fern | Medium indirect light (a couple of metres from a window) | Every 2–4 days in warm weather; soil should never fully dry out | Mildly toxic to pets |
| Southern Red Trillium | Medium indirect light (a couple of metres from a window) | Regularly moist in spring; reduce by mid-summer | Mildly toxic to pets |
| Spanish Bluebell | Medium indirect light (a couple of metres from a window) | Low to moderate; largely self-sufficient once established | Toxic to pets |
| Sparkler Palm Sedge | Medium indirect light (a couple of metres from a window) | Every 5-7 days or when the top 2 cm of soil is dry | Pet-safe |
| Spathiphyllum 'Mauna Loa' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Toxic to pets |
| Spathiphyllum 'Sensation' | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, often every 5-9 days | Toxic to pets |
| spear-leaved arrowhead vine | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growing season; every 10–14 days in winter | Toxic to pets |
| Spider Brake Fern | Medium indirect light (a couple of metres from a window) | When the top 2 cm of mix is dry, about every 5-7 days | Pet-safe |
| Spider plant | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, every 7-10 days | Pet-safe |
| Spike Moss | Medium indirect light (a couple of metres from a window) | Keep evenly moist at all times; typically water every 2-4 days so the soil never dries out | Pet-safe |
| Spiked Pleurothallis | Medium indirect light (a couple of metres from a window) | Daily in summer; every 2–3 days in winter | Pet-safe |
| Spinulose Lady Fern | Low light (north window or shaded room) | 2–3 times per week; keep consistently moist year-round | Pet-safe |
| Spiny Lady Fern | Medium indirect light (a couple of metres from a window) | Twice weekly throughout the growing season | Mildly toxic to pets |
| Spotted Dead Nettle | Medium indirect light (a couple of metres from a window) | Every 5–7 days in active growth; reduce to every 10–14 days in cool or dormant periods | Pet-safe |
| Spotted Dumb Cane | Medium indirect light (a couple of metres from a window) | Every 7–10 days in summer; every 14 days in winter | Toxic to pets |
| Spotted Mandarin | Medium indirect light (a couple of metres from a window) | Regular; keep soil evenly moist | Mildly toxic to pets |
| Spotted Trillium | Medium indirect light (a couple of metres from a window) | Regular during active growth; minimal when dormant | Mildly toxic to pets |
| Spotted-foot Stelis | Medium indirect light (a couple of metres from a window) | Every 1–2 days (mounted) or 2–3 times per week (potted) | Pet-safe |
| Spring Beauty | Medium indirect light (a couple of metres from a window) | Moderate during active growth (February–May); none needed during summer dormancy. | Pet-safe |
| Spring Snowflake | Medium indirect light (a couple of metres from a window) | Regularly during growth (late winter–spring); reduced but not dry in summer | Toxic to pets |
| Spring Symphony Foamflower | Medium indirect light (a couple of metres from a window) | Approximately every 5–7 days; more frequently in heat or drought | Pet-safe |
| Spring Symphony Tiarella | Medium indirect light (a couple of metres from a window) | Keep consistently moist; deep-water once or twice weekly during dry weather | Mildly toxic to pets |
| Squirrel Corn | Medium indirect light (a couple of metres from a window) | Every 3-5 days in spring growing season; no irrigation once dormant | Toxic to pets |
| Stalked Podolasia | Medium indirect light (a couple of metres from a window) | Keep substrate permanently saturated or in shallow standing water | Toxic to pets |
| Standley's Zamia | Medium indirect light (a couple of metres from a window) | Every 7–14 days in growing season; every 3 weeks in winter | Toxic to pets |
| Star-flowered Solomon's Seal | Medium indirect light (a couple of metres from a window) | 2 times per week during the growing season; reduce in dormancy | Mildly toxic to pets |
| Starfish Sansevieria | Medium indirect light (a couple of metres from a window) | When the soil is fully dry, roughly every 2-3 weeks (longer in winter) | Toxic to pets |
| Starflower | Medium indirect light (a couple of metres from a window) | Regular; keep soil consistently moist throughout the growing season (spring through autumn). | Pet-safe |
| Starry Solomon's Seal | Medium indirect light (a couple of metres from a window) | Regular, keeping soil evenly moist | Mildly toxic to pets |
| Stepladder Ginger | Medium indirect light (a couple of metres from a window) | Regular but drought tolerant once established | Mildly toxic to pets |
| Stiff-leaved Aponogeton | Medium indirect light (a couple of metres from a window) | Permanently submerged; fortnightly 25% water changes as a minimum | Pet-safe |
| Stinking Iris | Low light (north window or shaded room) | Low to moderate — drought-tolerant once established | Toxic to pets |
| Stinking Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist to damp through the growing season; reduce after summer dormancy | Mildly toxic to pets |
| Stolonifera Palm | Low light (north window or shaded room) | Every 10–14 days in summer, every 2–3 weeks in winter | Pet-safe |
| Strachey's Bergenia | Medium indirect light (a couple of metres from a window) | Every 7–10 days during the growing season; reduce in winter | Pet-safe |
| Strap-leaf Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 2–3 days in active growth; reduce slightly during winter dormancy | Pet-safe |
| Strawberry Begonia | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about every 5-7 days | Pet-safe |
| Strawberry Foxglove | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water weekly in dry periods | Toxic to pets |
| Striptease Hosta | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days in growth | Toxic to pets |
| Strobel's Masdevallia | Medium indirect light (a couple of metres from a window) | Every 1–2 days; keep substrate evenly moist throughout the year | Pet-safe |
| Strongly-Scented Bulbophyllum | Medium indirect light (a couple of metres from a window) | Every 3–5 days during active growth; every 7–10 days in cooler months | Pet-safe |
| Sublime Slipper Orchid | Medium indirect light (a couple of metres from a window) | When the top of the mix is just barely drying, roughly every 5-7 days | Mildly toxic to pets |
| Sugar and Spice Tiarella | Medium indirect light (a couple of metres from a window) | Keep consistently moist; deep-water once or twice weekly in dry spells | Mildly toxic to pets |
| Sukhakul's Slipper Orchid | Medium indirect light (a couple of metres from a window) | When the surface of the mix starts to dry, roughly every 5-7 days | Pet-safe |
| Sulphureum Epimedium | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 1-2 weeks | Mildly toxic to pets |
| Sunken Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 1–2 days; never allow to dry out completely | Pet-safe |
| Superb Stelis | Medium indirect light (a couple of metres from a window) | Every 2–3 days; mounted plants may need daily watering in summer | Pet-safe |
| Superba Rodgersia | Medium indirect light (a couple of metres from a window) | Keep consistently moist; water deeply 1-2 times weekly, more in heat | Mildly toxic to pets |
| Swamp doghobble | Medium indirect light (a couple of metres from a window) | Frequently; keep soil consistently moist | Toxic to pets |
| Sweet Betsy | Medium indirect light (a couple of metres from a window) | Consistently moist through spring and early summer; reduced moisture acceptable during summer dormancy. | Mildly toxic to pets |
| Sweet Box | Low light (north window or shaded room) | Water regularly while establishing; once settled, every 7-14 days in dry spells | Mildly toxic to pets |
| Sweet Trillium | Low light (north window or shaded room) | Keep soil consistently moist spring through early summer; minimal once dormant | Mildly toxic to pets |
| Sweet violet | Medium indirect light (a couple of metres from a window) | Every 5–7 days; keep evenly moist | Pet-safe |
| Sweet White Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist during spring; reduce after dormancy onset | Mildly toxic to pets |
| Sweet White Violet | Medium indirect light (a couple of metres from a window) | Regular; keep soil consistently moist | Pet-safe |
| Sweetbells Leucothoe | Medium indirect light (a couple of metres from a window) | Regularly throughout the growing season; do not allow to dry out | Toxic to pets |
| Swingle's primulina | Medium indirect light (a couple of metres from a window) | Every 8–12 days in spring–summer; every 16–21 days in winter | Pet-safe |
| Tailed Brake Fern | Medium indirect light (a couple of metres from a window) | Every 3–5 days in the growing season; every 7 days in winter | Pet-safe |
| Taiwan Begonia | Medium indirect light (a couple of metres from a window) | When the top 2–3 cm of compost feel dry | Toxic to pets |
| Tasmanian Holly Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, about every 5-7 days | Pet-safe |
| Tasmanian Pernettya | Medium indirect light (a couple of metres from a window) | Regular; keep soil evenly moist | Mildly toxic to pets |
| Tassel Fern | Low light (north window or shaded room) | When the top 2-3 cm of soil is just dry, roughly every 5-7 days in growth | Pet-safe |
| Tatting Fern | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season; reduce in winter | Pet-safe |
| Tattoo Hosta | Low light (north window or shaded room) | When the top 2-3cm of soil is dry, about every 5-7 days during active growth | Toxic to pets |
| Taxiphyllum alternans | Low light (north window or shaded room) | Fully submerged; 25-50% water change weekly | Mildly toxic to pets |
| Taxiphyllum barbieri | Low light (north window or shaded room) | Fully submerged; 25-50% water change weekly | Mildly toxic to pets |
| Taxiphyllum sp. 'Flame' | Low light (north window or shaded room) | Fully submerged; 25-50% water change weekly | Mildly toxic to pets |
| Taxiphyllum sp. 'Spiky' | Low light (north window or shaded room) | Fully submerged; 25-50% water change weekly | Mildly toxic to pets |
| Tayabas Begonia | Medium indirect light (a couple of metres from a window) | Every 6–9 days, allowing only the top 1–2 cm to dry between waterings | Toxic to pets |
| Teague's Porroglossum | Medium indirect light (a couple of metres from a window) | Every 2–4 days; allow medium surface to dry slightly between waterings | Pet-safe |
| Tectured Schismatoglottis | Low light (north window or shaded room) | Every 7–10 days; adjust based on humidity and temperature | Toxic to pets |
| Tellmann's honeysuckle | Medium indirect light (a couple of metres from a window) | Weekly during dry spells; especially important in summer while in active growth | Mildly toxic to pets |
| Temple Bells | Medium indirect light (a couple of metres from a window) | Every 3–4 days during active growth; cease entirely during winter dormancy | Mildly toxic to pets |
| The Rocket Ligularia | Medium indirect light (a couple of metres from a window) | Keep soil constantly moist; water deeply 2-3 times weekly in summer, daily in heat or dry spells | Mildly toxic to pets |
| Thelma's Begonia | Medium indirect light (a couple of metres from a window) | Every 7–10 days, allowing the top 2 cm of compost to partially dry | Toxic to pets |
| Thin-Leaved Sunflower | Medium indirect light (a couple of metres from a window) | Every 1–2 weeks; keep moderately moist | Pet-safe |
| Thorny Specklinia | Medium indirect light (a couple of metres from a window) | Every 1–2 days; do not allow complete drying | Pet-safe |
| Three-leaf Licuala | Medium indirect light (a couple of metres from a window) | Every 5–7 days; maintain consistent soil moisture | Pet-safe |
| Threeleaf Foamflower | Medium indirect light (a couple of metres from a window) | Approximately once or twice per week during the growing season; reduce in winter. | Mildly toxic to pets |
| Thunberg's astilbe | Medium indirect light (a couple of metres from a window) | Regular — every 2–3 days in warm weather; reduce in cool, overcast periods | Pet-safe |
| Thyme-leaved Fuchsia | Medium indirect light (a couple of metres from a window) | Regular — keep soil evenly moist | Pet-safe |
| Thyrse Ginger Lily | Medium indirect light (a couple of metres from a window) | Consistently moist through growing season; reduced in dormancy | Mildly toxic to pets |
| Tiger Kitten Begonia | Medium indirect light (a couple of metres from a window) | Every 7–14 days; allow top 2 cm to dry | Toxic to pets |
| Tiny Stelis | Medium indirect light (a couple of metres from a window) | Every 1–2 days; medium should not dry out completely | Pet-safe |
| Titanotrichum oldhamii | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 4-7 days in growth | Mildly toxic to pets |
| Toadshade Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist during spring and summer growing season; allow soil to dry slightly after summer dormancy. | Mildly toxic to pets |
| Tojen Toad Lily | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water when the surface begins to dry, roughly once or twice a week in summer | Mildly toxic to pets |
| Tokudama Flavocircinalis Hosta | Low light (north window or shaded room) | When the top 2-3cm of soil begins to dry, about every 5-7 days during active growth | Toxic to pets |
| Tongue Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of medium is dry, roughly every 7-10 days | Pet-safe |
| Toothwort | Medium indirect light (a couple of metres from a window) | 2–3 times per week during the brief spring growth period; essentially none during summer dormancy | Pet-safe |
| Torenia fournieri | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, often every 2-4 days in summer | Mildly toxic to pets |
| Transylvanian Hepatica | Medium indirect light (a couple of metres from a window) | Every 5–7 days in spring and autumn; every 10–14 days in summer | Mildly toxic to pets |
| Trevi Fountain Pulmonaria | Low light (north window or shaded room) | Keep soil evenly moist; water every 4-6 days in dry weather, more in containers | Mildly toxic to pets |
| Triangle Fern | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist during the growing season; water when the top 2-3 cm begins to dry | Toxic to pets |
| Triangular Masdevallia | Medium indirect light (a couple of metres from a window) | Daily in hot weather; every 2–3 days in spring and autumn | Pet-safe |
| Tropic Snow Dumb Cane | Medium indirect light (a couple of metres from a window) | Every 7–10 days in the growing season; every 14–18 days in winter | Toxic to pets |
| Tropical Crocus | Medium indirect light (a couple of metres from a window) | Every 5–7 days during the growing season; minimal to none during winter dormancy | Pet-safe |
| Tropical Sage | Medium indirect light (a couple of metres from a window) | Regular while establishing; reduced once established | Pet-safe |
| Tsubo Bamboo Grass | Medium indirect light (a couple of metres from a window) | 2–3 times per week in summer, once a week in winter | Pet-safe |
| Tsusima Holly Fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to dry, roughly every 5-7 days | Pet-safe |
| Tuerckheim's Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 1–2 days in summer; every 3–5 days in cooler months | Pet-safe |
| Tufted Loosestrife | Medium indirect light (a couple of metres from a window) | Permanently wet to shallow aquatic; bog garden or shallow pond margin | Pet-safe |
| Tunbridge Filmy Fern | Low light (north window or shaded room) | Continuously moist — never allow fronds to dry; mist 2–3 times daily or maintain in an enclosed humid environment | Mildly toxic to pets |
| Tuolumne Fawn Lily | Medium indirect light (a couple of metres from a window) | Consistently moist during growth (late winter to early summer); do not allow to dry out even during dormancy | Mildly toxic to pets |
| Turbo Peperomia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in terrariums; every 10–14 days in open pots | Pet-safe |
| Twiggy Lepanthes | Medium indirect light (a couple of metres from a window) | Daily misting; substrate must stay consistently moist | Pet-safe |
| Twinleaf | Medium indirect light (a couple of metres from a window) | 2 times per week during spring growth; reduce through summer | Mildly toxic to pets |
| Twisted Restrepia | Medium indirect light (a couple of metres from a window) | Every 2–4 days; maintain light but consistent moisture | Pet-safe |
| Twisted Stanhopea | Medium indirect light (a couple of metres from a window) | 3–5 times per week in active growth; reduce in winter | Pet-safe |
| Twisted Trillium | Medium indirect light (a couple of metres from a window) | Moderate moisture in spring; reduced in summer dormancy | Mildly toxic to pets |
| Two-edged Pleurothallis | Medium indirect light (a couple of metres from a window) | Every 1–2 days in warm months; every 2–3 days in winter | Pet-safe |
| Two-Petal Begonia | Medium indirect light (a couple of metres from a window) | Every 7–10 days; less in cooler months | Toxic to pets |
| Typhonium brownii | Medium indirect light (a couple of metres from a window) | Keep evenly moist in growth, watering when the top 2-3 cm dries; reduce sharply once foliage yellows | Toxic to pets |
| Typhonium trilobatum | Medium indirect light (a couple of metres from a window) | Keep evenly moist during active growth, about every 3-5 days; reduce in cool or dry rest periods | Toxic to pets |
| Umbrella Bamboo | Medium indirect light (a couple of metres from a window) | Twice weekly during establishment; every 5–7 days in summer once established | Pet-safe |
| Umbrella Magnolia | Medium indirect light (a couple of metres from a window) | Weekly during dry spells; keep soil evenly moist but not waterlogged | Pet-safe |
| Upright Hedge Parsley | Medium indirect light (a couple of metres from a window) | Moderate; keep soil evenly moist | Mildly toxic to pets |
| Ursula's Red Painted Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season, reduce in winter | Pet-safe |
| Valdivia Bamboo | Medium indirect light (a couple of metres from a window) | 2-3 times per week in active growth; weekly or less in cool wet winters | Pet-safe |
| Valentine Bleeding Heart | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water every 4-6 days in spring, easing off as it goes dormant | Toxic to pets |
| Vallisneria americana | Medium indirect light (a couple of metres from a window) | Submerged aquatic; keep continuously underwater with a 25-30% water change weekly | Mildly toxic to pets |
| Vallisneria gigantea | Medium indirect light (a couple of metres from a window) | Submerged aquatic; keep continuously underwater with a 25-30% water change weekly | Mildly toxic to pets |
| Vallisneria nana | Medium indirect light (a couple of metres from a window) | Submerged aquatic; keep continuously underwater with a 25-30% water change weekly | Mildly toxic to pets |
| Vallisneria spiralis | Medium indirect light (a couple of metres from a window) | Submerged aquatic; keep continuously underwater with a 25-30% water change weekly | Mildly toxic to pets |
| Variable Dancing Ginger | Medium indirect light (a couple of metres from a window) | 2–3 times per week during active growth; once every 2–3 weeks during dormancy | Mildly toxic to pets |
| Variegata Brunnera | Low light (north window or shaded room) | Keep soil reliably moist; water when the top 2-3 cm dries, roughly every 4-6 days in warm spells | Mildly toxic to pets |
| Variegated Cast Iron Plant | Low light (north window or shaded room) | When the top 3-5 cm of soil is dry, roughly every 10-14 days | Pet-safe |
| Variegated Japanese Spurge | Medium indirect light (a couple of metres from a window) | Every 5–7 days during establishment; once established, water during dry spells | Mildly toxic to pets |
| Variegated Lilyturf | Medium indirect light (a couple of metres from a window) | Weekly during establishment; established plants are drought-tolerant, needing water only during prolonged summer drought | Mildly toxic to pets |
| Variegated Solomon's Seal | Low light (north window or shaded room) | Every 5-7 days in active growth; drought-tolerant once established | Toxic to pets |
| Variegated Yellow Sedge | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water every 5-7 days in dry spells and never let containers dry out | Mildly toxic to pets |
| Vasey's Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist through spring; reduce over summer dormancy | Mildly toxic to pets |
| Vazquez's Zamia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in summer; every 14–21 days in winter | Toxic to pets |
| Velvet Calathea | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| Velvet Leaf Vine | Medium indirect light (a couple of metres from a window) | Every 7–10 days in growing season; every 14–21 days in winter | Toxic to pets |
| Vesicularia dubyana | Low light (north window or shaded room) | Fully submerged; 25-50% water change weekly | Mildly toxic to pets |
| Vesicularia montagnei | Low light (north window or shaded room) | Fully submerged; 25-50% water change weekly | Mildly toxic to pets |
| Victoria Lady Fern | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season; reduce in winter | Pet-safe |
| Vidal's Lady Fern | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season; reduce in winter | Pet-safe |
| Vining Peperomia | Medium indirect light (a couple of metres from a window) | Every 7–10 days in spring/summer; every 2–3 weeks in winter | Pet-safe |
| Virginia Bluebells | Medium indirect light (a couple of metres from a window) | 1–2 inches per week in spring; minimal needed once dormant | Pet-safe |
| Virginia Chain Fern | Medium indirect light (a couple of metres from a window) | Frequently — keep soil consistently moist to wet | Pet-safe |
| Walking Fern | Low light (north window or shaded room) | Keep substrate evenly moist at all times; check every 3-5 days and never let it dry fully | Pet-safe |
| Wall Monanthes | Medium indirect light (a couple of metres from a window) | Every 1–2 weeks in the growing season; every 3–4 weeks in winter | Pet-safe |
| Wall-rue Spleenwort | Medium indirect light (a couple of metres from a window) | Sparingly — only when the substrate is dry to the touch | Mildly toxic to pets |
| Wallich's Wood Fern | Medium indirect light (a couple of metres from a window) | Regular in first season; moderate once established | Pet-safe |
| Wallichiana Fern | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil begins to dry, about every 5-7 days | Mildly toxic to pets |
| Wallis's Dragon Orchid | Medium indirect light (a couple of metres from a window) | Every 2–3 days; medium kept continuously moist | Pet-safe |
| Warneckii Dracaena | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry, roughly every 10-14 days | Toxic to pets |
| Water Avens | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist to wet; never let it dry out | Mildly toxic to pets |
| Watercress Fern | Medium indirect light (a couple of metres from a window) | When the surface starts to dry, roughly every 3-5 days | Mildly toxic to pets |
| Watermelon Begonia | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 5-7 days in growth | Pet-safe |
| Wavy Aponogeton | Medium indirect light (a couple of metres from a window) | Permanently submerged; weekly 25% water changes recommended | Pet-safe |
| Weeping Eastern Hemlock | Medium indirect light (a couple of metres from a window) | Every 1–2 weeks; more in hot or dry conditions | Pet-safe |
| Welsh Poppy | Medium indirect light (a couple of metres from a window) | Moderate; moist but not waterlogged | Toxic to pets |
| Welwitsch's Anchomanes | Medium indirect light (a couple of metres from a window) | Every 7–10 days in active growth; cease watering during dry-season dormancy | Toxic to pets |
| Wendland's Bulbophyllum | Medium indirect light (a couple of metres from a window) | Regularly throughout the year; keep medium consistently moist in summer, slightly drier in winter | Pet-safe |
| Wendland's Lepanthes | Medium indirect light (a couple of metres from a window) | Daily or every 2 days; never dry out | Pet-safe |
| Western Hemlock | Medium indirect light (a couple of metres from a window) | Weekly during establishment; regular moisture long-term | Pet-safe |
| Western Maidenhair Fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 4-6 days | Pet-safe |
| Western Skunk Cabbage | Medium indirect light (a couple of metres from a window) | Permanently moist to wet; boggy or waterlogged conditions required | Toxic to pets |
| Western Sword Fern | Low light (north window or shaded room) | When the top 3 cm of soil is dry, roughly every 7-10 days | Pet-safe |
| Western White Trillium | Medium indirect light (a couple of metres from a window) | Consistently moist spring through early summer; reduced but not completely dry in summer dormancy. | Mildly toxic to pets |
| Wheeler's Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in summer, every 3–4 weeks in winter | Pet-safe |
| Wherry's Foamflower | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water about weekly, more in dry spells | Mildly toxic to pets |
| Wherry's Foamflower | Medium indirect light (a couple of metres from a window) | Once or twice per week in the growing season; reduce significantly in winter. | Mildly toxic to pets |
| White Baneberry | Medium indirect light (a couple of metres from a window) | 2–3 times per week in growing season; weekly when dormant | Toxic to pets |
| White Bleeding Heart | Medium indirect light (a couple of metres from a window) | Every 3-5 days in active growth; reduce once dormant | Toxic to pets |
| White Comfrey | Medium indirect light (a couple of metres from a window) | Every 5–10 days during dry periods | Mildly toxic to pets |
| White Dancing Ginger | Medium indirect light (a couple of metres from a window) | 1–2 times per week during active growth; withhold in winter dormancy | Mildly toxic to pets |
| White Mugwort | Medium indirect light (a couple of metres from a window) | Weekly or when top 2–3 cm of soil dries | Mildly toxic to pets |
| White Nancy Dead Nettle | Medium indirect light (a couple of metres from a window) | Every 7–10 days during active growth; reduce in winter | Pet-safe |
| White Periwinkle | Medium indirect light (a couple of metres from a window) | Weekly during establishment; self-sufficient in average rainfall once established | Toxic to pets |
| White Sails | Medium indirect light (a couple of metres from a window) | Every 7–10 days during active growth; reduce to every 14 days in winter | Toxic to pets |
| White Skunk Cabbage | Medium indirect light (a couple of metres from a window) | Continuously moist to waterlogged; never allow to dry out | Toxic to pets |
| White Towers Toad Lily | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water when the surface starts to dry, often once or twice weekly in summer | Mildly toxic to pets |
| White Trillium | Medium indirect light (a couple of metres from a window) | Weekly during spring growth; reduce after dormancy | Mildly toxic to pets |
| White Trout Lily | Medium indirect light (a couple of metres from a window) | Keep consistently moist while in growth (spring); reduce after dormancy | Mildly toxic to pets |
| White wood aster | Medium indirect light (a couple of metres from a window) | Every 1–2 weeks during establishment; largely self-sufficient once established in woodland settings | Pet-safe |
| White Young's Barrenwort | Medium indirect light (a couple of metres from a window) | Water weekly, or when the top 2 cm of soil dries, particularly during establishment; reduce frequency once settled | Mildly toxic to pets |
| Whitelock's Ceratozamia | Medium indirect light (a couple of metres from a window) | Weekly to every 10 days in growing season; reduce in winter | Toxic to pets |
| Whorled Solomon's Seal | Medium indirect light (a couple of metres from a window) | Every 5–7 days during the growing season; reduce in autumn | Mildly toxic to pets |
| Wide Brim Hosta | Low light (north window or shaded room) | When the top 2-3cm of soil is dry, roughly every 5-7 days during active growth | Toxic to pets |
| Wide-leaf Ceratozamia | Medium indirect light (a couple of metres from a window) | Every 2–3 weeks | Toxic to pets |
| Wild Blue Phlox | Medium indirect light (a couple of metres from a window) | Weekly; keep soil evenly moist | Mildly toxic to pets |
| Wild Cardamom | Medium indirect light (a couple of metres from a window) | Regularly throughout the growing season; reduce in winter | Mildly toxic to pets |
| Wildwood Twist Painted Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days; maintain consistent soil moisture | Pet-safe |
| Willow Gentian | Medium indirect light (a couple of metres from a window) | Regular; maintain consistently moist soil throughout the growing season | Mildly toxic to pets |
| Wilson's Filmy Fern | Low light (north window or shaded room) | Continuously moist — fronds must never dry; maintain in a sealed humid enclosure with permanent moisture at the rhizomes | Mildly toxic to pets |
| Windowed Air Plant | Medium indirect light (a couple of metres from a window) | Keep the central cup filled with water at all times; refresh weekly, and water the medium every 1–2 weeks | Pet-safe |
| Winged Kacip Fatimah | Low light (north window or shaded room) | Water when the top 1–2 cm of medium begins to dry; approximately every 4–7 days depending on temperature and humidity | Mildly toxic to pets |
| Winter Aconite | Medium indirect light (a couple of metres from a window) | Relies on natural rainfall; keep soil moist during active growth | Toxic to pets |
| Winter Gem Boxwood | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, about weekly while establishing | Toxic to pets |
| Winter Glow Bergenia | Medium indirect light (a couple of metres from a window) | Every 7–14 days during the growing season; very little in winter | Pet-safe |
| Wisley Gaultheria | Medium indirect light (a couple of metres from a window) | Every 5–7 days in the growing season; less in cool winters | Mildly toxic to pets |
| Wollaston's Holly Fern | Low light (north window or shaded room) | Every 3–5 days; keep moist but well-drained | Pet-safe |
| Wood Anemone | Medium indirect light (a couple of metres from a window) | Weekly during spring growth; none required during summer dormancy | Toxic to pets |
| Wood Avens | Medium indirect light (a couple of metres from a window) | Low to moderate — rain-fed in shade | Pet-safe |
| Wood Club-rush | Medium indirect light (a couple of metres from a window) | Permanently moist to wet; tolerates shallow standing water | Pet-safe |
| Wood Forget-me-not | Medium indirect light (a couple of metres from a window) | Moderate; keep soil moist but well-drained | Pet-safe |
| Wood Melic | Medium indirect light (a couple of metres from a window) | Keep evenly moist while establishing; tolerates dry shade once rooted | Mildly toxic to pets |
| Wood Melick | Medium indirect light (a couple of metres from a window) | Infrequently; drought-tolerant under shade | Pet-safe |
| Wood Sedge | Low light (north window or shaded room) | Keep evenly moist; water weekly or more in summer | Pet-safe |
| Wood Vetch | Medium indirect light (a couple of metres from a window) | Low to moderate — prefers moderate moisture with periods of drying | Mildly toxic to pets |
| Woodland Sunflower | Medium indirect light (a couple of metres from a window) | Every 2–3 weeks; drought-tolerant once established | Pet-safe |
| Woodsia ilvensis | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-8 days | Mildly toxic to pets |
| Woodsia obtusa | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, roughly every 5-8 days | Mildly toxic to pets |
| Woodwardia fimbriata | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist to wet; check every 2-4 days in growth | Mildly toxic to pets |
| Wrinkled Elatostema | Low light (north window or shaded room) | Every 3–5 days; soil should remain consistently moist | Pet-safe |
| Yellow Archangel | Medium indirect light (a couple of metres from a window) | Every 7–14 days; drought-tolerant once established in shade | Mildly toxic to pets |
| Yellow Barrenwort | Medium indirect light (a couple of metres from a window) | Weekly during first two seasons; established plants are drought-tolerant and rarely need supplemental watering | Mildly toxic to pets |
| Yellow Clintonia | Low light (north window or shaded room) | Twice weekly in dry spells; maintain even soil moisture throughout the growing season | Pet-safe |
| Yellow Fairybells | Medium indirect light (a couple of metres from a window) | Regular; maintain consistent moisture | Mildly toxic to pets |
| Yellow Fawnlily | Medium indirect light (a couple of metres from a window) | Consistently moist during active growth (late winter to late spring); minimal after dormancy | Mildly toxic to pets |
| Yellow Glacier Lily | Medium indirect light (a couple of metres from a window) | Regular during spring growth; reduce sharply after dormancy | Mildly toxic to pets |
| Yellow Loosestrife | Medium indirect light (a couple of metres from a window) | Regularly, keeping soil consistently moist | Mildly toxic to pets |
| Yellow Pimpernel | Medium indirect light (a couple of metres from a window) | High; keep consistently moist | Mildly toxic to pets |
| Yellow Trillium | Medium indirect light (a couple of metres from a window) | Regular during spring growing season; reduced once foliage dies back in summer. | Mildly toxic to pets |
| Yellow Trout Lily | Medium indirect light (a couple of metres from a window) | Water regularly in spring; allow to dry naturally after dormancy sets in | Mildly toxic to pets |
| Yellow Wood Anemone | Medium indirect light (a couple of metres from a window) | Weekly during spring growth; dormant and dry in summer | Toxic to pets |
| Yellow Woodland Violet | Medium indirect light (a couple of metres from a window) | Weekly; maintain evenly moist soil throughout spring and summer | Mildly toxic to pets |
| Yellow-Bracted Nidularium | Medium indirect light (a couple of metres from a window) | Refill central cup weekly; substrate every 10–14 days | Pet-safe |
| Yokosca Lady Fern | Low light (north window or shaded room) | Every 2–3 days; keep soil moist to wet | Pet-safe |
| Yokosuka Lady Fern | Medium indirect light (a couple of metres from a window) | Twice weekly during the growing season; reduce in winter | Mildly toxic to pets |
| Zamia Fern | Medium indirect light (a couple of metres from a window) | Every 1–2 weeks | Toxic to pets |
| Zebra Temple Bells | Medium indirect light (a couple of metres from a window) | Every 3–4 days in active growth; taper off in autumn; none in winter dormancy | Mildly toxic to pets |
| Zecher's Air Plant | Medium indirect light (a couple of metres from a window) | Soak 30 minutes twice weekly; mist 2-3 times per week between soaks | Pet-safe |
| Zigzag Clover | Medium indirect light (a couple of metres from a window) | Moderate; tolerates short dry spells once established | Pet-safe |
| Zigzag Goldenrod | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water weekly in dry spells | Mildly toxic to pets |
| Zigzag Iris | Medium indirect light (a couple of metres from a window) | Consistently moist to wet | Mildly toxic to pets |
| Zomicarpella amazonica | Medium indirect light (a couple of metres from a window) | Keep evenly moist in growth, surface just drying; reduce while resting | Mildly toxic to pets |
| Zulu Spurflower | Medium indirect light (a couple of metres from a window) | Moderate — water twice weekly in containers; less frequently in ground | Mildly toxic to pets |
| ZZ plant | Low light (north window or shaded room) | When the soil is completely dry, every 2-3 weeks | Toxic to pets |
| ZZ Plant Lucky | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, roughly every 2-3 weeks | Toxic to pets |
| ZZ Plant Raven | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, roughly every 2-3 weeks | Toxic to pets |
| ZZ Plant Zenzi | Medium indirect light (a couple of metres from a window) | When the top half of the soil is dry, roughly every 2-3 weeks | Toxic to pets |