Storing and Sowing Delphinium Seeds

Cold Storage and Indoor Starting for Delphiniums

Dry seeds thoroughly; store in paper envelope inside sealed jar in refrigerator (not freezer).
After 3+ months cold stratification, sow indoors 8–10 weeks before last frost.
Surface-sow on moist sterile mix; light aids germination. Cover with plastic dome.
Keep at 60–65°F (16–18°C). Germination in 14–21 days.
Remove dome at first sprout to prevent damping-off.
Transplant at 2 true leaves; grow cool (55–60°F) with strong light (14 hrs/day fluorescent).
Fertilize at ¼ strength with fish/seaweed emulsion.
Harden off and plant out after last frost in rich, well-drained soil.

Resources: GardenGuides, MU Extension, Nancy Bubel's New Seed-Starter's Handbook.

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