| Accent Scarlet Busy Lizzie | Medium indirect light (a couple of metres from a window) | Keep the compost evenly moist; typically water every 1-3 days in warm weather as plants wilt quickly in dry conditions | Mildly toxic to pets |
| 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 |
| Affinis Taro | Medium indirect light (a couple of metres from a window) | Keep evenly moist; water when the top 1-2 cm of soil dries, roughly every 4-7 days | Toxic to pets |
| African Chain Fern | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil feels barely moist, roughly every 5-8 days in growing season | Pet-safe |
| 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 |
| Afzel's Nephthytis | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 7-10 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 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 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 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 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 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 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 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 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 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 |
| Alexandrae Brake Fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is barely moist, roughly every 7 days in summer | Pet-safe |
| 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 Water Fern | Medium indirect light (a couple of metres from a window) | When the top 1 cm of soil feels dry, roughly every 4-6 days in summer | Pet-safe |
| 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 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 |
| 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 |
| Angola Culcasia | 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 |
| 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 |
| Apennine Windflower | Medium indirect light (a couple of metres from a window) | Rainfall usually sufficient in woodland settings; water once per week only during dry springs | 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 |
| 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 |
| Astilbe 'Deutschland' | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water every 3-5 days or as needed to prevent the top 2 cm of soil drying out | Pet-safe |
| Astilbe 'Fanal' | Medium indirect light (a couple of metres from a window) | Consistently moist — water whenever the top 2-3 cm of soil begins to dry, roughly every 3-5 days in summer | Pet-safe |
| 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 |
| Aureola Japanese Forest Grass | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil feels dry, roughly every 5-7 days in the growing season | Pet-safe |
| Ayabaca Masdevallia | Medium indirect light (a couple of metres from a window) | Every 2–3 days; keep medium consistently moist | Pet-safe |
| Baby Tears Plant | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist, watering every 3-5 days | Pet-safe |
| Bahian Earth Star | Medium indirect light (a couple of metres from a window) | Every 7–10 days | 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 |
| Basket Bromeliad | Medium indirect light (a couple of metres from a window) | Tank every 5–7 days; soil every 10–14 days | 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 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 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 |
| 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 |
| 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 |
| Beucker's Earth Star | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of potting mix is dry, roughly every 7-10 days | Pet-safe |
| 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 Bromeliad | Medium indirect light (a couple of metres from a window) | Keep the central cup filled; water the compost lightly 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 |
| 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 Flowering Sedge | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist to wet; water whenever the surface begins to dry | Pet-safe |
| 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) | 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 |
| Blunt Greenhood | Medium indirect light (a couple of metres from a window) | Keep lightly moist during active growth (autumn–spring), roughly every 5-7 days | Pet-safe |
| 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 |
| Bogner's Bucephalandra | Medium indirect light (a couple of metres from a window) | Keep substrate or media consistently moist; do not allow to dry out between waterings | 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 |
| 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 |
| 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 |
| 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-leaf Chain Orchid | Medium indirect light (a couple of metres from a window) | Every 5-7 days in growth; every 10-14 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 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 |
| Brown Spiderwort | 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 | Mildly toxic to pets |
| 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 |
| 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 |
| Bud-bearing Trisetella | Medium indirect light (a couple of metres from a window) | When the medium surface is just barely drying, roughly every 3-5 days | 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 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 |
| 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 Shield Fern | Medium indirect light (a couple of metres from a window) | Every 5–7 days in growing season; reduce in winter | Pet-safe |
| Callous-lipped Slipper Orchid | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of mix becomes dry, roughly every 5-7 days year-round | Mildly toxic to pets |
| 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 |
| Canadian Lousewort | Medium indirect light (a couple of metres from a window) | Regularly; keep soil evenly moist | Mildly toxic to pets |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Chilean Hard Fern | Medium indirect light (a couple of metres from a window) | Keep consistently moist — water when the top 1-2 cm of soil is dry, typically every 5-7 days indoors | 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 'Visions' | 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; more drought-tolerant than most astilbes | Mildly toxic to pets |
| Chinese Brake Fern | 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 spring and summer | Mildly toxic to pets |
| 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 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 |
| 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 |
| Climbing Chamaedorea | 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 |
| Climbing Culcasia | 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Common blue violet | Medium indirect light (a couple of metres from a window) | Every 5–10 days; tolerates wet soil | 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 Maidenhair Fern | Medium indirect light (a couple of metres from a window) | Every 2–4 days; keep soil evenly moist | Pet-safe |
| Common Pothos | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 7-12 days | Toxic to pets |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 Elatostema | Low light (north window or shaded room) | Water freely in active growth (spring–autumn); moderately in winter | Pet-safe |
| Creeping Phlox 'Blue Ridge' | 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 | 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 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 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 Silver Lady Fern | 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 spring and summer | Pet-safe |
| 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 |
| Crisped Water Trumpet | Medium indirect light (a couple of metres from a window) | Permanently submerged; substrate should never dry out | Toxic to pets |
| 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) | 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 |
| 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 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 wendtii 'Green' | Low light (north window or shaded room) | Submerged full-time; change 20-30% of tank water weekly | Mildly toxic to pets |
| Cup Ginger | 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 | 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 |
| Curved-Leaf Vriesea | Medium indirect light (a couple of metres from a window) | Keep the central tank one-quarter to one-half full; flush every 7-10 days; water soil only when top 3 cm is dry | Pet-safe |
| Cushion Moss Selaginella | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist, watering every 4-6 days before the surface dries | 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 |
| 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 |
| Dancing Ladies Ginger | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil feels dry, roughly every 5-7 days in the growing season; reduce to nearly dry in winter dormancy | Mildly toxic to pets |
| Daphne laureola | Low light (north window or shaded room) | Weekly while establishing; rarely once established | 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 |
| Davis's Masdevallia | Medium indirect light (a couple of metres from a window) | When the medium surface barely begins to dry, roughly every 3-5 days | Pet-safe |
| Delta Dracula | Medium indirect light (a couple of metres from a window) | Every 2-3 days, never allowing roots to dry out completely | Pet-safe |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Dogwood | Medium indirect light (a couple of metres from a window) | Low to moderate — water during establishment; drought-tolerant thereafter | Mildly toxic to pets |
| Donnell Smith's Guzmania | Medium indirect light (a couple of metres from a window) | Keep the central tank filled; flush and refill every 7-10 days; water soil only when the top 3 cm is dry | 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 |
| 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 |
| 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 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 Tail Plant | 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 |
| 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 Star of Bethlehem | Medium indirect light (a couple of metres from a window) | When the top 3-5 cm of soil is dry during active growth, roughly every 7-10 days | Toxic to pets |
| 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 |
| 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 |
| 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 Holly Fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil feels dry, roughly every 5-7 days in summer | 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 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 Rose-Stripe Star | Medium indirect light (a couple of metres from a window) | Water when the top 1-2 cm of soil is dry, roughly every 5-7 days | Pet-safe |
| 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 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 |
| Dyer's Air Plant | Medium indirect light (a couple of metres from a window) | Daily misting plus weekly soak | Pet-safe |
| Dynastes Masdevallia | Medium indirect light (a couple of metres from a window) | Water when medium approaches dryness, roughly every 1-2 days in warm months | 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 Hemlock | Medium indirect light (a couple of metres from a window) | Weekly during establishment; regular moisture required long-term | Pet-safe |
| 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 |
| Elegant Peacock Ginger | Medium indirect light (a couple of metres from a window) | Weekly during growing season; cease in winter dormancy | Pet-safe |
| Elegant Peacock Ginger | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil feels dry, roughly every 5-8 days in the growing season; cease watering during winter dormancy | Mildly toxic to pets |
| 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 Queen Fern | 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 spring and summer | Pet-safe |
| 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 |
| 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 |
| Erect Moss 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 |
| Escobar's Lepanthes | Medium indirect light (a couple of metres from a window) | Daily or every 2 days; keep medium consistently moist | Pet-safe |
| Escobar's Lepanthes | Medium indirect light (a couple of metres from a window) | Daily misting or near-daily watering; substrate should never fully dry out | 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 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 |
| 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 |
| Featherleaf Rodgersia 'Superba' | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; water deeply 2-3 times per week in dry spells, more in summer heat | Mildly 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 |
| Fiesta Double Pink Impatiens | Medium indirect light (a couple of metres from a window) | Keep compost evenly moist at all times; water every 1-2 days in warm weather as double-flowered types are slightly more moisture-demanding than singles | Mildly toxic to pets |
| 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 |
| 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 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 Syngonium | 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 in summer and every 10-14 days in winter | Toxic to pets |
| Florida Torreya | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, roughly every 10-14 days | Toxic to pets |
| Fluffy Ruffle Fern | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil feels barely moist, roughly every 5-7 days in summer | 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 Epipremnum | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 8-12 days | Toxic to pets |
| Forest Lily Amaryllis | Medium indirect light (a couple of metres from a window) | Regular during growing season (every 7–10 days); significantly reduced or withheld during dormancy | Toxic to pets |
| 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 |
| 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 Plum Yew | Medium indirect light (a couple of metres from a window) | When the top 5 cm of soil is dry, roughly every 10-14 days in the growing season | 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 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 |
| 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 Coelogyne | Medium indirect light (a couple of metres from a window) | Every 7-10 days in the growing season; every 14-21 days in cooler months | Pet-safe |
| 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 |
| 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 |
| 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 |
| 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 Bucephalandra | Medium indirect light (a couple of metres from a window) | Keep substrate consistently moist (emersed) or fully submerged (aquatic); do not allow to dry out | Toxic to pets |
| Giant Chain Fern | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil begins to dry, roughly every 5-8 days in summer | 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 |
| Gilbert Peacock Ginger | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 7-10 days in active growth | Mildly toxic to pets |
| 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 |
| 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 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 Polypody Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil feels dry, roughly every 7-10 days in summer | Pet-safe |
| 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 |
| Goldtau Hair Grass | Medium indirect light (a couple of metres from a window) | Every 5-10 days; keep consistently moist | 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 |
| 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 |
| Great Wood Rush | Medium indirect light (a couple of metres from a window) | Low to moderate; established plants rarely need supplemental watering in temperate climates | 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 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 Spleenwort | Medium indirect light (a couple of metres from a window) | When the top centimetre of soil dries out | Pet-safe |
| Green Wave Fern | Low light (north window or shaded room) | Keep substrate or roots consistently moist; for aquarium use, submerge fully and maintain water changes | 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 |
| 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 |
| Hairy Bertolonia | Medium indirect light (a couple of metres from a window) | Every 4–6 days; keep evenly moist | Pet-safe |
| Hairy Hydrangea | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil feels dry, roughly every 5-7 days in summer | Toxic to pets |
| 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 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-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 |
| Hallae's Nephthytis | Medium indirect light (a couple of metres from a window) | Water when the top 2-3 cm of soil dries out, approximately every 7-10 days | 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 |
| Hand Fern | 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 | 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 |
| Hartford Climbing 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 in active growth | Pet-safe |
| 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 Fern | 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 | Pet-safe |
| 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 Curcuma | 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 during active growth | Mildly toxic to pets |
| 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 Hornbeam | Medium indirect light (a couple of metres from a window) | Moderate; water regularly when young; maintain consistent moisture | Pet-safe |
| 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 |
| 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 Lily | Medium indirect light (a couple of metres from a window) | When top 3–4 cm of soil feels dry | 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 |
| 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 |
| 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 |
| 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 |
| Hosta 'Abiqua Drinking Gourd' | Low light (north window or shaded room) | When the top 3-4 cm of soil is dry, roughly every 6-8 days in summer | Toxic to pets |
| Hosta 'Big Daddy' | Low light (north window or shaded room) | When the top 3-4 cm of soil is dry, roughly every 6-8 days in summer | Toxic to pets |
| Hosta 'Blue Angel' | Medium indirect light (a couple of metres from a window) | Every 5-7 days during the growing season, or when the top 3-5 cm of soil is drying | Toxic to pets |
| Hosta 'Blue Mammoth' | Low light (north window or shaded room) | When the top 3-4 cm of soil is dry, roughly every 5-7 days in summer | Toxic to pets |
| Hosta 'Bressingham Blue' | Low light (north window or shaded room) | When the top 3 cm of soil is dry, roughly every 7 days in summer | Toxic to pets |
| Hosta 'Color Festival' | 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 summer | Toxic to pets |
| Hosta 'Elegans' | Medium indirect light (a couple of metres from a window) | Every 5-7 days during the growing season, or when the top 3-5 cm of soil is drying | Toxic to pets |
| Hosta 'Empress Wu' | 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 during the growing season | Toxic to pets |
| Hosta 'Fortunei Aureomarginata' | Medium indirect light (a couple of metres from a window) | Every 5-7 days during the growing season, or when the top 3-5 cm of soil is drying | Toxic to pets |
| Hosta 'Frances Williams' | Medium indirect light (a couple of metres from a window) | Every 5-7 days in the growing season, or when the top 3-5 cm of soil is drying out | Toxic to pets |
| Hosta 'Fun and Games' | 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 summer | Toxic to pets |
| Hosta 'Golden Tiara' | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 5-7 days in summer | Toxic to pets |
| Hosta 'Great Expectations' | 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 during the growing season | Toxic to pets |
| Hosta 'Guacamole' | 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 | Toxic to pets |
| Hosta 'Halcyon Blue' | Low light (north window or shaded room) | When the top 3 cm of soil is dry, roughly every 7-10 days in summer | Toxic to pets |
| Hosta 'Halcyon' | 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 | Toxic to pets |
| Hosta 'Love Pat' | Low light (north window or shaded room) | When the top 3 cm of soil is dry, roughly every 6-8 days in summer | Toxic to pets |
| Hosta 'Patriot' | 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 through the growing season | Toxic to pets |
| Hosta 'Paul Revere' | 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 during the growing season | Toxic to pets |
| Hosta 'Remember Me' | 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 the growing season | Toxic to pets |
| Hosta 'Revolution' | 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 during the growing season | Toxic to pets |
| Hosta 'Sagae' | 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 the growing season | Toxic to pets |
| Hosta 'Stained 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 in the growing season | Toxic to pets |
| Hosta 'Sum and Substance' | Medium indirect light (a couple of metres from a window) | When the top 3-4 cm of soil is dry, roughly every 5-7 days in summer | Toxic to pets |
| Hosta 'Undulata Albomarginata' | 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 | Toxic to pets |
| Hosta 'Wide Brim' | 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 during the growing season | Toxic to pets |
| Humboldt's Caladium | 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 active growth | 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 |
| 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 |
| Indonesian Wax Ginger | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil becomes dry, roughly every 5-7 days | 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 |
| Inner-rough Pleurothallis | Medium indirect light (a couple of metres from a window) | When the medium surface is just drying, roughly every 4-6 days | 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 |
| 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 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 |
| Ivory Cane 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 |
| 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-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 |
| 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 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 Cobra Lily | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist during the growing season (spring to early summer); cease watering during summer dormancy | Toxic to pets |
| 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 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 Royal Fern | Medium indirect light (a couple of metres from a window) | Frequently — keep soil constantly moist | Pet-safe |
| 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 |
| 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 |
| Kerala Lagenandra | Medium indirect light (a couple of metres from a window) | Permanently saturated or submerged substrate; never allow to dry | Toxic to pets |
| 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 |
| 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 |
| 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 |
| Lace Flower Vine | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of potting mix is dry, roughly every 5-7 days | Pet-safe |
| 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 |
| 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 |
| Lanceolate Anubias | Low light (north window or shaded room) | Permanently submerged or emersed aquatic plant | 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 Masterwort | Medium indirect light (a couple of metres from a window) | Every 5-7 days; soil should remain evenly moist throughout the growing season | Mildly toxic to pets |
| 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-Leaf Primulina | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of potting mix is dry, roughly every 7-10 days | 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 |
| 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 |
| 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 |
| Lemon-scented Aerangis | Medium indirect light (a couple of metres from a window) | Water when roots begin to appear silvery-grey (indicating dryness), roughly every 5-8 days in summer and every 10-14 days in cooler months | Pet-safe |
| Leopard Plant 'Desdemona' | Medium indirect light (a couple of metres from a window) | Every 3-5 days in warm weather; keep soil consistently moist or wet | Mildly toxic to pets |
| Leopard Plant 'The Rocket' | Medium indirect light (a couple of metres from a window) | Every 3-5 days or more frequently in warm weather; soil should remain consistently moist | Mildly toxic to pets |
| 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 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 |
| 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 |
| 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 |
| Long-flower Cirrhopetalum | Medium indirect light (a couple of metres from a window) | Every 6-8 days during growth; every 10-14 days in cooler or slower growth periods | Pet-safe |
| Long-Stalked Pothos | 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 |
| 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 |
| 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 |
| Lungwort 'Bertram Anderson' | Medium indirect light (a couple of metres from a window) | Every 7-10 days; somewhat more drought-tolerant than other pulmonarias but still prefers consistent moisture | Pet-safe |
| Lungwort 'Mrs Moon' | Medium indirect light (a couple of metres from a window) | Every 5-7 days in the growing season; keep soil moist but not waterlogged | Pet-safe |
| 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 |
| 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 |
| 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 |
| 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 |
| Mandianum Blue Star Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil is dry, approximately every 7-10 days in the growing season | Pet-safe |
| Mann's Culcasia | Medium indirect light (a couple of metres from a window) | Water when the top 2-3 cm of soil feels dry, roughly every 7-10 days | 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 |
| Marginata Wood Rush | Medium indirect light (a couple of metres from a window) | Low to moderate; water during dry spells in the first growing season, then minimal supplemental water needed | 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 |
| Masterwort 'Ruby Wedding' | Medium indirect light (a couple of metres from a window) | Every 5-7 days in warm weather; reduce in cooler months when growth slows | Mildly toxic to pets |
| Masterwort 'Venice' | Medium indirect light (a couple of metres from a window) | Every 5-7 days; do not allow soil to dry out during active growth | Mildly toxic to pets |
| 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 |
| Medusa's Cirrhopetalum | 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 |
| Meebold's Lagenandra | Low light (north window or shaded room) | Keep permanently moist to fully submerged; never dry out | Toxic to pets |
| Meebold's Lagenandra | Medium indirect light (a couple of metres from a window) | Keep permanently waterlogged or submerged; substrate must never dry out | Toxic to pets |
| Mejia's Masdevallia | Medium indirect light (a couple of metres from a window) | Water when the medium is approaching dryness, roughly every 1-2 days in active growth | Pet-safe |
| 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 |
| 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 |
| 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 |
| 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 |
| Minute Masdevallia | Medium indirect light (a couple of metres from a window) | Every 2–3 days; keep medium consistently moist | Pet-safe |
| 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 |
| 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 |
| Monster Scaphosepalum | Medium indirect light (a couple of metres from a window) | When the top of the medium just begins to dry, roughly every 3-5 days | Pet-safe |
| 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 |
| Moore's Crinum | 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 in the growing season | Toxic to pets |
| Morren's Catopsis | Medium indirect light (a couple of metres from a window) | Keep the central tank topped up; flush weekly; water soil lightly every 10-14 days | 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 |
| Mosaic Vase Plant | Medium indirect light (a couple of metres from a window) | Keep the central vase (cup) filled with water at all times; refresh weekly | 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 Bladder Fern | Low light (north window or shaded room) | 2-3 times per week in active growth; reduce when dormant | 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 |
| 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-Leafed Arrowhead Vine | 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 in summer and every 10-14 days in winter | Toxic to pets |
| 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 Kaempferia | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil feels dry, roughly every 6-8 days in the growing season; cease or minimise during winter dormancy | 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Noble Fissidens | Medium indirect light (a couple of metres from a window) | Permanently submerged aquatic plant | Pet-safe |
| Noble Hand Fern | 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 | Pet-safe |
| Nodding Greenhood | Medium indirect light (a couple of metres from a window) | Lightly moist during active growth (autumn–spring), roughly every 5-8 days | Pet-safe |
| 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 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 |
| 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 |
| Oersted's Dieffenbachia | 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 |
| 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-flower Masdevallia | Medium indirect light (a couple of metres from a window) | When the top 1 cm of moss or mix begins to dry, approximately every 3-5 days; never allow to dry out completely | 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-Sheathed Bucephalandra | Medium indirect light (a couple of metres from a window) | Permanently moist substrate (emersed) or fully submerged (aquatic); rhizome must never dry out | Toxic to pets |
| 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 |
| 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 |
| 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 |
| Overlooked Lagenandra | Medium indirect light (a couple of metres from a window) | Keep permanently moist to semi-submerged; does not tolerate drying out | 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 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 Brake Fern | 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 spring and summer | Mildly toxic to pets |
| Painted Dumbcane | Medium indirect light (a couple of metres from a window) | When the top 3–4 cm of soil is dry, roughly every 7–14 days | 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 Masdevallia | Medium indirect light (a couple of metres from a window) | Water when medium is nearly dry, roughly every 1-2 days in active growth | Pet-safe |
| 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 |
| 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) | 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 |
| Panama Dichaea | Medium indirect light (a couple of metres from a window) | Keep consistently moist but never soggy; water every 3-5 days in warm months and every 5-8 days in cooler months — do not allow the plant to dry out completely as it has no pseudobulbs for water storage | Pet-safe |
| 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 |
| Partridgeberry | Low light (north window or shaded room) | Keep soil evenly moist; water when the top 1–2 cm begins to dry | Pet-safe |
| Patini's Peace Lily | Low light (north window or shaded room) | When the top 2–3 cm of soil feels dry, roughly every 7–10 days in warm seasons | 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 |
| Peacock Plant Ginger | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil feels dry, roughly every 7-10 days in active growth | Mildly toxic to pets |
| 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 |
| Pendulous Homalomena | Low light (north window or shaded room) | Every 7–12 days in summer; every 14–18 days in winter | Toxic to pets |
| Perfoliate Bellwort | Medium indirect light (a couple of metres from a window) | Moderate in spring; established plants are drought-tolerant once dormant. | Pet-safe |
| 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 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 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 |
| Phoenix Moss | Medium indirect light (a couple of metres from a window) | Permanently submerged aquatic plant | Pet-safe |
| 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-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 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 |
| 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 |
| 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 |
| Pleasant Lembocarpus | Low light (north window or shaded room) | Keep substrate consistently moist during the growing season; withhold water during dormancy | Pet-safe |
| 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 |
| 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 |
| 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 |
| Poisson's Nephthytis | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 7-10 days | Toxic to pets |
| 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-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 |
| 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 |
| Proliferous Pleurothallis | Medium indirect light (a couple of metres from a window) | When the medium surface just starts to dry, roughly every 4-6 days | Pet-safe |
| Przewalski's Leopard Plant | Medium indirect light (a couple of metres from a window) | Every 3-5 days in the growing season; soil should remain evenly moist to slightly wet | Mildly toxic to pets |
| 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 Royal Fern | Medium indirect light (a couple of metres from a window) | Freely and consistently — never allow to dry out | Pet-safe |
| Purple Royal Fern | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist to wet; may need watering every 2-3 days in summer heat | 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 |
| Rabbit Foot Prayer Plant | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil feels dry, roughly every 7-10 days in summer | 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 |
| 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 |
| 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 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 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 Nerve Plant | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to feel dry, roughly every 5-7 days | 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 Veined Prayer Plant | 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 in the growing season | Pet-safe |
| 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 |
| 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 Fern | Medium indirect light (a couple of metres from a window) | Allow to dry slightly between waterings; roughly every 7-10 days, or mist daily when mounted | Pet-safe |
| 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 |
| 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 |
| 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 Dracula | Medium indirect light (a couple of metres from a window) | When the medium surface just barely begins to dry, roughly every 3-5 days | Pet-safe |
| 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 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 |
| Rosebay Rhododendron | 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 in summer | 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 |
| Rothschild's Cirrhopetalum | Medium indirect light (a couple of metres from a window) | Every 5-7 days during the growing season; every 10-14 days in cooler months | Pet-safe |
| 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 |
| 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 |
| Roxburgh's Typhonium | Medium indirect light (a couple of metres from a window) | When the top 2–3 cm of soil is dry during active growth; dry dormancy over winter | 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 |
| 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 |
| Salal | Low light (north window or shaded room) | Moderate; established plants are drought-tolerant but prefer moist conditions | Pet-safe |
| 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 |
| 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 |
| Schott's Syngonium | 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 in warm seasons | 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 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 |
| Shade Mudflower | Medium indirect light (a couple of metres from a window) | Fully submerged — permanent aquatic plant | Pet-safe |
| Shaggy Wood Fern | Medium indirect light (a couple of metres from a window) | Regular; keep moist but not waterlogged | Pet-safe |
| 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-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-stemmed Restrepia | Medium indirect light (a couple of metres from a window) | Every 2–4 days; medium kept evenly moist | Pet-safe |
| Siberian Bugloss 'Hadspen Cream' | Medium indirect light (a couple of metres from a window) | Every 5-7 days during the growing season; reduce in winter | Pet-safe |
| 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 |
| Sierra Leucothoe | Medium indirect light (a couple of metres from a window) | Regularly; do not allow to dry out between waterings | Toxic to pets |
| 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 Goosefoot Plant | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 7-10 days in summer and every 10-14 days in winter | Toxic to pets |
| Silver Star Bromeliad | Medium indirect light (a couple of metres from a window) | Water when the top 1-2 cm of compost is dry, roughly every 5-7 days | Pet-safe |
| Silver-Veined Taro | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil is dry, roughly every 5-8 days | Toxic to pets |
| 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 |
| 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 Brake Fern | Medium indirect light (a couple of metres from a window) | When the top 2 cm of soil is dry, roughly every 7 days in summer | 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-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 |
| 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-white Slipper Orchid | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of the mix is dry, approximately every 5-7 days | 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 |
| 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 |
| 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 |
| 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 |
| Spike Moss | Low light (north window or shaded room) | Keep the soil consistently moist; water every 3-5 days or whenever the surface begins to dry | 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 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-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 |
| Spreading Selaginella | Low light (north window or shaded room) | Keep evenly moist; water every 3-5 days ensuring the soil never dries out | Pet-safe |
| Spreading Spike Moss | Medium indirect light (a couple of metres from a window) | Keep soil consistently moist; check every 2-3 days | 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 |
| 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 Fern | 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 | Pet-safe |
| 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 |
| Stepladder Ginger | Medium indirect light (a couple of metres from a window) | Regular but drought tolerant once established | Mildly 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 |
| Strap Water Fern | Low light (north window or shaded room) | Keep soil consistently moist; water every 3-5 days in summer and reduce slightly 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 Foxglove | Medium indirect light (a couple of metres from a window) | Keep soil evenly moist; water weekly in dry periods | 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 |
| Strobel's Masdevallia | Medium indirect light (a couple of metres from a window) | Water freely when the medium begins to approach dryness, roughly every 1-2 days in summer | 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 |
| Summer Wave Amethyst Wishbone Flower | 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 |
| 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 |
| 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 Trichopilia | Medium indirect light (a couple of metres from a window) | Water when the top 2-3 cm of medium is dry, roughly every 5-8 days in summer; reduce to every 10-14 days in winter | Pet-safe |
| 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 |
| 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 |
| Swertia-leaf Scaphosepalum | Medium indirect light (a couple of metres from a window) | When the medium surface is barely beginning to dry, roughly every 3-5 days | Pet-safe |
| 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 |
| 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 |
| 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 |
| Tentacle Lepanthes | Medium indirect light (a couple of metres from a window) | Daily misting or continuous humidity; never allow roots to fully dry | Pet-safe |
| 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-awn Trisetella | Medium indirect light (a couple of metres from a window) | When the medium surface just begins to dry, roughly every 3-5 days | 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 |
| 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 |
| Tongue Water Trumpet | Medium indirect light (a couple of metres from a window) | Permanently submerged or saturated substrate; never allow to dry | Toxic to pets |
| 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 |
| 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 |
| 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 Trichopilia | Medium indirect light (a couple of metres from a window) | Water when the medium is nearly dry at the surface, roughly every 5-8 days in active growth; reduce to every 10-14 days in cooler months during rest | Pet-safe |
| Two-colored Lacaena | Medium indirect light (a couple of metres from a window) | Water when the medium is nearly dry at the surface, roughly every 5-8 days in active growth; reduce to every 10-14 days in cooler months | Pet-safe |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Walker's Water Trumpet | Low light (north window or shaded room) | Permanently submerged; never allow substrate to dry | Toxic to pets |
| 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 |
| 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 |
| Warty Scaphosepalum | Medium indirect light (a couple of metres from a window) | When the surface of the medium is just barely dry, roughly every 3-5 days | Pet-safe |
| 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 |
| Weberbauer's Lepanthes | Medium indirect light (a couple of metres from a window) | Near-daily misting; substrate must not dry completely at any point | 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 |
| Weeping Eastern Hemlock | 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 | Mildly toxic to pets |
| Weeping Moss | Medium indirect light (a couple of metres from a window) | Fully submerged — permanent aquatic plant | Pet-safe |
| 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 |
| Welwitsch's Anchomanes | Medium indirect light (a couple of metres from a window) | Keep evenly moist during the growing season; reduce to minimal watering during 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 |
| Wendt's Water Trumpet | Low light (north window or shaded room) | Keep permanently submerged or in constantly saturated, waterlogged substrate | Toxic to pets |
| West Indian Tree Fern | Medium indirect light (a couple of metres from a window) | When the top 2-3 cm of soil feels just dry, roughly every 5-7 days in warm weather | 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 |
| Wheki Tree Fern | Medium indirect light (a couple of metres from a window) | Consistently moist — water deeply 2-3 times per week in dry periods during the growing season | 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 |
| 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 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 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 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 |
| 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-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 |
| 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 |
| 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 |
| Wood Club-rush | Medium indirect light (a couple of metres from a window) | Permanently moist to wet; tolerates shallow standing water | Pet-safe |
| 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 Bird's Nest | Medium indirect light (a couple of metres from a window) | Maintain water in the central cup; water compost when mostly dry, roughly every 10-14 days | Pet-safe |
| 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 Loosestrife | Medium indirect light (a couple of metres from a window) | Regularly, keeping soil consistently moist | Mildly toxic to pets |
| Yellow Promenaea | Medium indirect light (a couple of metres from a window) | Water when the potting medium is nearly dry at the surface but still faintly moist below, roughly every 5-8 days in summer and every 10-14 days in cooler months | Pet-safe |
| 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-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 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 |