Vegetable / Cool season
Waltham 29 Broccoli
Spring and fall brassica beds where pest netting is practical.
Dense green heads with smaller side shoots after the main cut.
Seed spacing and maturity
- Days to maturity
- 74
- Germination temperature
- 55-85F
- Seed depth
- 0.5 inches
- Spacing
- 18 inches
- Row spacing
- 30 inches
- Start method
- Either
Frost-date timing
- Indoor start
- 6 weeks before last frost
- Direct sow
- 21 days before last frost
- Transplant
- 14 days before last frost
- Fall planting
- 12 weeks before first frost
- Succession interval
- repeat every 21 days
Action plan
- 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 or transplant depending on your soil warmth, bed readiness, and frost-risk plan.
- How much space?
- 18 inches in-row spacing, 30 inches between rows, and 0.5 inch seed depth.
- Best companions?
- Use crop-family rotation first, then pair with compatible timing, spacing, and canopy size rather than relying on a simple companion chart.
- Common failure modes?
- Do not follow another mustard-family crop in the same bed when rotation space exists. Even moisture during head formation. Fertile, well-drained soil with steady nitrogen.
Growing profile
- Sun
- Full sun
- Water
- Even moisture during head formation.
- Soil
- Fertile, well-drained soil with steady nitrogen.
- Watch
- Do not follow another mustard-family crop in the same bed when rotation space exists.
- brassica
- cool-season
- fall
- side-shoots
Browse context
- Vegetable Catalog Category collection
- Mustard Family Rotation and family context
- Cool Season Seeds Season collection
- Either Seeds Start-method collection
- Container-Friendly Seeds Practical trait collection
- Succession Sowing Seeds Practical trait collection
- Fall-Planting Seeds Practical trait collection
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