Lily of the Valley (Convallaria majalis) - How to Grow & Care Guide

Plant Snapshot

Common Name: Lily of the Valley
Latin Name: Convallaria majalis
Hardiness Zones: USDA zones 2–9. In colder zones foliage may die back more deeply. In warmer zones plants can spread more vigorously.
Typical Height: 6–12 in (15–30 cm).
Typical Spread: 12–24 in (30–60 cm) or wider as colonies form.
Bloom Period: Spring, typically April–May in the Northern Hemisphere.
Soil Preferences: Moist, humus rich and well drained soil. Tolerates heavier soils and a range of pH. Poor drainage can cause rot and drought reduces flowering.
Light Preferences: Partial to full shade. Tolerates dappled sun or morning sun and may accept more sun in cool climates.
Toxicity: All parts are poisonous to humans and pets and contain cardiac glycosides that can cause serious cardiac and gastrointestinal symptoms if ingested.
Propagation: Divide rhizomes in fall or spring and replant. Can be grown from seed but division of established clumps is faster and more reliable.

Key Facts

Perennial groundcover that spreads by underground rhizomes.
Produces fragrant, nodding white bell flowers in spring.
Forms a low basal clump of glossy leaves.
Can form dense colonies and be locally aggressive.
All parts of the plant are poisonous if ingested.
Prefers shady, woodland style plantings.
Low maintenance once established.

Lily of the Valley (Convallaria majalis) is a low, shade tolerant perennial groundcover prized for fragrant white, nodding bell flowers in spring. It spreads by underground rhizomes and can form dense colonies that are attractive in woodland style plantings but require monitoring.

Identification

Glossy basal leaves form a low clump about 6 to 12 inches tall. Flower stalks rise above the leaves in spring with small, fragrant white bells. All parts of the plant are poisonous if ingested.

Best uses and where to grow

Use Lily of the Valley as a shaded groundcover beneath trees or in a woodland border where a low, carpeted look is wanted. It performs best in partial to full shade and tolerates dappled sun or morning sun in cool climates. Reported hardiness ranges from USDA zone 2 to 9 with some sources listing zones 3 to 8 so check local recommendations for your area.

Planting and propagation

Propagate by dividing rhizomes in fall or spring for fastest establishment. Divisions can be spaced roughly to match the plant’s natural spread which commonly reaches 12 to 24 inches or wider as colonies form. Seed is possible but slow and less reliable for quick groundcover.

Soil and watering

Grow in moist, humus rich, well drained soil. The plant tolerates heavier soils but poor drainage can cause rot and drought reduces flowering. Adding organic matter helps maintain consistent moisture and supports reliable blooms.

Bloom and seasonal notes

Flowers appear in spring, typically April to May in the Northern Hemisphere. After flowering the clump remains a low mass of leaves and is low maintenance once established.

Managing spread and control

Lily of the Valley spreads by creeping rhizomes and can be locally aggressive, forming dense patches that crowd out other plants. Control by digging and dividing clumps in fall or spring and by removing unwanted runners. Consider border edging or containers where spread needs to be limited.

Safety and toxicity

All parts of Lily of the Valley contain cardiac glycosides and are poisonous to people and pets. Handle plants and soil with care around children and animals and seek immediate medical or veterinary help if ingestion is suspected.

Frequently asked questions

How fast does Lily of the Valley grow?: It spreads gradually by underground rhizomes and can form dense colonies over several seasons. Typical mature spread is about 12 to 24 inches or wider as colonies establish.
When should I divide Lily of the Valley?: Divide rhizomes in fall or spring to expand plantings or reduce crowded patches.
Can I plant Lily of the Valley in sun?: It prefers partial to full shade but will tolerate some morning sun in cooler climates.
What kind of soil does it need?: Moist, humus rich and well drained soil is best. Too little moisture reduces flowering and poor drainage can cause rot.
Is Lily of the Valley invasive?: It can be locally aggressive because of rhizome spread. Use control measures such as dividing, digging out runners, or growing in containers when needed.