Vegetable / Cool season
American Flag Leek
Long-season allium beds and soup-garden plantings.
Mild onion flavor with tender white shanks.
Seed spacing and maturity
- Days to maturity
- 120
- Germination temperature
- 55-75F
- Seed depth
- 0.25 inches
- Spacing
- 6 inches
- Row spacing
- 18 inches
- Start method
- Start indoors
Frost-date timing
- Indoor start
- 10 weeks before last frost
- Transplant
- 14 days before last frost
- Fall planting
- 14 weeks before first frost
Growing profile
- Sun
- Full sun
- Water
- Even water supports long, mild shanks.
- Soil
- Deep, fertile, well-drained soil that can be hilled or mulched.
- Watch
- Do not let seedlings dry out before transplanting; leeks recover slowly.
- allium
- long-season
- cool-season
- transplant
Browse context
- Vegetable Catalog Category collection
- Onion Family Rotation and family context
- Cool Season Seeds Season collection
- Start Indoors Seeds Start-method collection
- Container-Friendly Seeds Practical trait collection
- Fall-Planting Seeds Practical trait collection
Related varieties
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- Giant Imperial Larkspur Buttercup family · Cool season · 110 days
- Tall Utah Celery Carrot family · Cool season · 110 days
- Long Island Improved Brussels Sprouts Mustard family · Cool season · 100 days
- Tall Maximum Snapdragon Plantain family · Cool season · 100 days
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Source: UMN starting seeds indoors