| Abyssinian Peperomia | Medium indirect light (a couple of metres from a window) | Every 10–14 days in the growing season; every 3–4 weeks in winter | Pet-safe |
| Adiantum venustum | Medium indirect light (a couple of metres from a window) | When the top 1-2 cm of soil begins to dry, roughly every 4-6 days | Pet-safe |
| Aerangis fastuosa | Medium indirect light (a couple of metres from a window) | Water every 1-3 days, keeping the roots consistently moist | Pet-safe |
| 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 |
| 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 |
| Amalia's Dragon Orchid | Medium indirect light (a couple of metres from a window) | Daily to every other day; medium must stay damp but not sodden | Pet-safe |
| American alumroot | Medium indirect light (a couple of metres from a window) | Once or twice per week; reduce in winter | Pet-safe |
| American Lady Fern | Low light (north window or shaded room) | Every 2–3 days during active growth; less frequently in winter | Pet-safe |
| American Royal Fern | Medium indirect light (a couple of metres from a window) | Twice weekly or more; keep consistently moist | Pet-safe |
| American Wall Fern | Medium indirect light (a couple of metres from a window) | Every 7–10 days when in growth; every 2–3 weeks in winter | Pet-safe |
| 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 |
| 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 |
| Angel Frost Masdevallia | Medium indirect light (a couple of metres from a window) | Daily in hot weather; every 2–3 days in spring and autumn | Pet-safe |
| Anoectochilus roxburghii | Low light (north window or shaded room) | Keep evenly moist, watering roughly every 3-5 days as the surface begins to dry | Pet-safe |
| Appalachian Barren Strawberry | Medium indirect light (a couple of metres from a window) | Low to moderate; drought-tolerant once established | Pet-safe |
| Arendsii astilbe | Medium indirect light (a couple of metres from a window) | 2–3 times per week in summer; weekly otherwise | Pet-safe |
| 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 |
| Asplenium platyneuron | Low light (north window or shaded room) | Water when the top 2-3 cm is dry; tolerates short dry spells better than most ferns | Pet-safe |
| Astilbe '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 |
| Ayabaca Masdevallia | Medium indirect light (a couple of metres from a window) | Every 2–3 days; keep medium consistently moist | Pet-safe |