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Delphiniums

Delphinium elatum. Featuring old-fashioned, elegant spires of delicate flowers, these cottage garden favorites also make terrific cut flowers. They prefer cold weather and can be started outside as soon as the soil can be worked in the spring. Deer resistant. Perennial. Hardiness zones: 3-8. Summer flowering. Height: 2' to 3' .

Average seed life: 1 to 2 years.

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Gardening Tips

Delphinium Sowing Instructions
Planting Depth
:1/2”
Seed Spacing:1”
Plant Spacing:8”-12”
Days to Germination:14-18 days
Germination Temperature:65°-75°F

Delphinium elatum. Delphinium tolerates cold weather and prefers to be direct-sown outdoors as soon as the soil can be worked. Sow 1⁄2" deep in well-draining, loamy soil with full sun. Firm soil well, since they require darkness for optimal germination. Keep uniformly moist until the seedlings emerge, about 2 weeks after sowing. If you must start indoors and transplant out, sow in the early spring in a good seed-starting medium at about 65° to 75°F. Provide even moisture, strong light and good ventilation until they are 3" tall. Prior to transplanting, acclimate the seedlings by gradually exposing them to outside conditions for 1 to 2 weeks. Thin or transplant 8" to 12" apart in the garden. Weed carefully and keep well-watered until established. Their elegant flower spires may require staking or support. Summer flowering. Height: 24" to 30".