Days to Germination:14-18 days
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".