SITE

Delphinium

Botanical Name

Delphinium x elatum

Hardiness

Zones 3 to 7

Height

4 to 6 feet

Width

2 feet

Flowers

Early to mid summer: blue, white, purple, red, pink, yellow

Light

Full sun

Soil

Moist, well-drained

Planting & Care

• Space plants 24 inches apart
• Avoid wet feet in winter
• Protect from wind
• Deadhead for repeat bloom
• Stake tall varieties
• Divide annually for longevity

Problems

Crown rot, powdery mildew, mites, aphids, borer, leaf spot, botrytis blight

Varieties

• New Millenium Hybrids - 4-6', sturdier stems and better winter survival
• Mid Century Hybrids - stronger stems and less mildew (Ivory Towers, Moody Blues, Rosy Future, Ultra Violet)
• Delphinium x belladonna - 3-4', highly branched, more flower stems and hardier