True lily (Asiatic lily) care

Light

Bright but filtered. True lily burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Bright light with some direct sun; full sun in the garden, a bright sill indoors. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering true lily: keep evenly moist while growing, every 5-7 days. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Moist but never waterlogged; bulbs rot in standing water.

Soil and pot

True lily grows best in rich, free-draining mix. Loamy, fertile soil with good drainage; add grit for pots. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

True lily sits happiest at around 40-60% humidity and 15-24°C (59-75°F). Average room humidity is fine. If you keep the room above 15 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed true lily sparingly. High-potash feed every two weeks from bud to bloom. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on true lily in the Growli community. Each is annotated with the most common cause so you know where to start.

• No flowers — Too little light or bulbs planted too shallow; give full sun and depth.
• Yellowing leaves after bloom — Normal dieback — let foliage feed the bulb before removing.
• Soft, rotting bulb — Overwatering or poor drainage; lift and replant in grittier mix.
• Red lily beetles — Pick off by hand or treat early; they strip foliage fast.

Propagation

Divide bulb offsets or detach scales in autumn and grow on in gritty compost. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

True lily is toxic to pets. The ASPCA lists Lilium spp. as toxic, and they are among the most dangerous plants for cats: even a tiny exposure — a few leaves or petals, or licked pollen or vase water — can cause acute kidney failure that is often fatal if untreated within about 18 hours. Every part of the plant is toxic. Effects are far more severe in cats than dogs (which mainly get stomach upset). Treat any feline exposure as an emergency and call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 immediately. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

True lily deep-dive guides

Every aspect of true lily care, each with its own calibrated guide:

• True lily watering schedule
• True lily light requirements
• Best soil mix for true lily
• True lily fertilizing guide
• When to repot true lily
• How to propagate true lily
• True lily growth rate & size
• True lily cold hardiness
• True lily temperature & humidity
• Is true lily toxic to cats & dogs?
• Is true lily toxic to cats?
• Is true lily toxic to dogs?
• Getting true lily to bloom

Featured in these plant shortlists

True lily qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• Best fragrant houseplants — Indoor plants with scented flowers or aromatic foliage — greenery you can smell, selected from our care library.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

True lily is also known as Asiatic lily, Oriental lily, Easter lily, tiger lily, and stargazer lily.

• Peace lily care — light, water and common problems
• Bird of paradise care — light, water and common problems
• Hoya care — light, water and common problems
• All 611 plant care guides in the Growli library