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
- Days to maturity
- 110
- Germination temperature
- 40-65F
- Seed depth
- 0.25 inches
- Spacing
- 8 inches
- Row spacing
- 12 inches
- Start method
- Direct sow
Frost-date timing
- Direct sow
- 42 days before last frost
- Fall planting
- 10 weeks before first frost
Growing profile
- 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.
- cut-flowers
- cool-season
- direct-sow
- containers
Browse context
- Flower Catalog Category collection
- Buttercup Family Rotation and family context
- Cool Season Seeds Season collection
- Direct Sow Seeds Start-method collection
- Container-Friendly Seeds Practical trait collection
- Fall-Planting Seeds Practical trait collection
Related varieties
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Source: Seed Savers seed saving guide