Delphinium nudicaule

Common Names

Red Larkspur, Orange Larkspur, Scarlet Larkspur

Summary

Red Larkspur (Orange Larkspur, Canyon Delphinium) is a perennial herb native to California and Oregon. It grows about 1–2 ft tall with erect stems and basal, 3–10 lobed leaves; flowers are orange-red tubular blooms on long stalks with a straight spur 1/2–1 in long, produced in a few-flowered raceme and blooming in spring to early summer; hummingbirds are attracted to the blooms.

Cultivation favors sunny to partly shaded positions with dry, rocky, well-drained soil; avoid waterlogged conditions and protect from slugs and snails. Propagation is by seed (germination 1–3 months at 10–13°C; 1 month stratification may help) or by division of resting tubers. All parts are poisonous if ingested. Uses include rock gardens, borders, containers, and cut flowers, with nectar attracting hummingbirds.

Lifecycle

Perennial

Height

1-2 feet

Spread

1-2 feet

Hardiness Zones

Zones 3-7

Sunlight Requirements

Ideally full sun. Tolerates partial shade.

Soil Type

Well-drained, rich soil with organic matter, pH 5.5–7

Soil Drainage

Well-drained soil (dry rocky preferred)

Soil pH

5.5-7

Bloom Color

Orange to red, with occasional yellow

Bloom Time

Spring to early Summer

Foliage Color

Green (leaves with pale patches in the centers)

Leaf Lifecycle

Deciduous

Growth Rate

Medium rate.

Seasons of Interest

Spring and Summer

Propagation Methods

Seeds, Cuttings, Division

Attracts Wildlife

Bees: Yes, Hummingbirds: Yes, Butterflies: Yes, Other pollinators: Yes, Birds: Yes