Flower / Cool season

Giant Imperial Larkspur

Early cut-flower rows and cool-season cottage borders.

Tall spires for cut flowers; ornamental only.

Seed spacing and maturity

Can I plant this now?: Use your local last-frost, first-frost, and soil-temperature checks before treating this crop as plantable today.
Start indoors or direct sow?: Direct sow into the final bed when the soil temperature, seed depth, and moisture are ready.
How much space?: 8 inches in-row spacing, 12 inches between rows, and 0.25 inch seed depth.
Best companions?: Use this as part of a diverse flowering or herb planting, and treat companion claims as site-specific rather than guaranteed pest control.
Common failure modes?: All plant parts are toxic; keep away from grazing animals and children. Even moisture during cool establishment and stem growth. Fertile, well-drained soil with support in windy sites.

Sun: Full sun
Water: Even moisture during cool establishment and stem growth.
Soil: Fertile, well-drained soil with support in windy sites.
Watch: All plant parts are toxic; keep away from grazing animals and children.