Veratrum californicum

Common Names

California False Hellebore, Western False Hellebore, California Corn Lily

Summary

Veratrum californicum is a western North American native perennial herb with an erect, unbranched stem up to 1–2 m tall arising from thick rhizomes; it bears broad, pleated bright green leaves 20–40 cm long and a branched inflorescence bearing many flowers with six white tepals and a green center, with buds that are tight green spheres and the capacity for mast seeding, flowering mainly in midsummer. Cultivation requires deep, fertile, moisture-retentive soil with partial shade; full sun is tolerated if moisture is maintained, while dry soils are avoided, and it is hardy in USDA zones 4a–9b. Propagation is by seed sown in pots in a cold frame as soon as ripe or by division in spring or autumn. The plant is highly poisonous and should not be eaten; gloves are advised when handling, and livestock exposure should be avoided. In gardens it suits woodland or shaded settings and can serve as a dramatic vertical accent near wetlands, with historical medicinal use by Native American tribes and occasional insecticidal uses for dried root material.

Lifecycle

Perennial

Height

3.5-6.5 feet

Spread

5-8 feet

Hardiness Zones

Zones 8-9

Sunlight Requirements

Ideally partial shade, full sun is tolerated if the soil remains moist.

Soil Type

Moist, deep, fertile loamy or clay soils

Soil Drainage

Moist but well-drained soil

Soil pH

5.5-7.5, Tolerates all pH levels

Bloom Color

White

Bloom Time

Summer (July–August)

Foliage Color

Green

Fall Foliage Color

Green

Leaf Lifecycle

Deciduous

Growth Rate

Fast

Seasons of Interest

Spring and Summer

Propagation Methods

Seeds, Division

Attracts Wildlife

Attracts bees, butterflies, and other pollinators, no evidence for hummingbirds or birds