Lily of the valley (May lily) care

Light

Lily of the valley is one of the rare houseplants that genuinely tolerates low-light corners. Part to full shade; ideal under deciduous trees. Watch for a few telltale signs that even a low-light plant has been pushed too far: slow or stalled growth, pale or stretched stems, and a soil that stays wet for far longer than it should because the plant simply is not transpiring much.

Watering

Water lily of the valley weekly watering. The actual day count varies with pot size, light level, and the season — the finger test (or, better, lifting the pot to feel its weight) is more reliable than a calendar. Empty any drainage saucer after watering so the pot is never sitting in water. Consistent moisture in growing season; drought-tolerant once established.

Soil and pot

Lily of the valley grows best in rich woodland loam. Humus-rich; pH 6.0-7.0. 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

Lily of the valley sits happiest at around 40-70% (outdoor) humidity and 10-21°C (50-70°F). Outdoor humidity rarely matters. If you keep the room above 10 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 lily of the valley sparingly. Leaf-mould top-dress in spring. 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 lily of the valley in the Growli community. Each is annotated with the most common cause so you know where to start.

• Aggressive spread — Rhizomes run; install a rhizome barrier or grow in containers.
• Yellow foliage in summer — Normal dormancy if dry; water more or accept the dieback.
• Sparse flowers — Overcrowded — divide every 3-4 years.
• Slugs eat new shoots — Ring with grit early in spring.
• Difficult to remove — Persistent rhizome fragments resprout; dig deeply or smother.

Companion plants

Lily of the valley pairs well with Hosta, Fern, and Bleeding heart. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Divide rhizomes (pips) in autumn; each pip with roots will produce a flowering plant. 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

Lily of the valley is toxic to pets. ASPCA lists Convallaria majalis as severely toxic to cats, dogs, and horses due to cardiac glycosides (convallarin, convallotoxin). Causes vomiting, slow heart rate, arrhythmia, seizures. Veterinary emergency. 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.

Lily of the valley deep-dive guides

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

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

Related guides

Lily of the valley is also known as May lily, May bells, and our lady's tears.

• 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 200 plant care guides in the Growli library