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Garden delphiniums

Delphinium ×cultorum

Also called Garden Delphinium

Garden delphiniums
Photo: Deutsche Gartenbau-Gesellschaft.; Kaiserliche Russischer Gartenbau-Verein in St. Petersburg.; Russischer Gartenbau-Verei, Public domain

Garden delphiniums are hybrid perennials bred from several Delphinium species, grown for tall spikes of blue, purple, white or pink flowers. They need full sun, rich well-drained soil and staking, and they resent wet winter soil.

Family
Ranunculaceae (Buttercup family)
Grows as
Perennial
Light
Full sun, Part shade
Water
Water at the base in dry spells, keeping soil moist but never waterlogged.
Soil
Fertile, humus-rich, well-drained soil with plenty of organic matter; add lime if soil is acidic.
Temperature
Hardy to about -30 °C; prefers cool summers and dislikes prolonged heat above 30 °C.
How easy
Moderate
Safety
Toxic: All parts contain toxic alkaloids such as delphinine; ingestion can cause vomiting, abdominal pain, and in severe cases heart and nervous system effects.

About

Garden delphiniums are horticultural hybrids derived from some perennial species in the genus Delphinium. Breeding of garden delphiniums started from the 19th century in Western Europe. In the 20th century, the United States, Japan and New Zealand also contributed to delphinium breeding.

Other Delphinium plants

Doubtful knight's-spur · Royal knight's-spur · Scarlet larkspur · Candle larkspur · Siberian larkspur · Violet Larkspur · Rocky Mountain larkspur · Larkspur

Text excerpted from the Wikipedia article Garden delphiniums by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

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