Herb / Warm season
Florence Fennel
Bulb fennel beds and pollinator plantings if allowed to flower.
Anise-scented bulb, fronds, flowers, and seed.
Seed spacing and maturity
- Days to maturity
- 80
- Germination temperature
- 60-80F
- Seed depth
- 0.25 inches
- Spacing
- 12 inches
- Row spacing
- 18 inches
- Start method
- Either
Frost-date timing
- Indoor start
- 4 weeks before last frost
- Direct sow
- 7 days after last frost
- Transplant
- 7 days after last frost
- Fall planting
- 10 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?
- 12 inches in-row spacing, 18 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?
- Transplant gently; root disturbance and heat can trigger bolting. Even water supports bulb swelling and reduces stress bolting. Fertile, well-drained soil with consistent moisture.
Growing profile
- Sun
- Full sun
- Water
- Even water supports bulb swelling and reduces stress bolting.
- Soil
- Fertile, well-drained soil with consistent moisture.
- Watch
- Transplant gently; root disturbance and heat can trigger bolting.
- herb
- bulb
- pollinators
- containers
Browse context
- Herb Catalog Category collection
- Carrot Family Rotation and family context
- Warm Season Seeds Season collection
- Either Seeds Start-method collection
- Container-Friendly Seeds Practical trait collection
- High Pollinator Value Seeds Practical trait collection
- Succession Sowing Seeds Practical trait collection
- Fall-Planting Seeds Practical trait collection
Related varieties
- Black Beauty Eggplant Nightshade family · Warm season · 80 days
- Envy Edamame Soybean Legume family · Warm season · 80 days
- Golden Bantam Sweet Corn Grass family · Warm season · 80 days
- Red Noodle Yardlong Bean Legume family · Warm season · 80 days
- Sugar Baby Watermelon Cucurbit family · Warm season · 80 days
- Tall Double Mix Strawflower Aster family · Warm season · 80 days
Source: CSU vegetable planting guide