When to Plant Cauliflower in Louisiana
Published: April 24, 2026
Louisiana gardeners in Zone 8b enjoy an extended 45-week growing season for cauliflower. Cool-season crops like cauliflower do best in fall, winter, and early spring in Louisiana — the hot summers bolt these plants before they can be harvested. This guide gives exact dates for Louisiana based on your local frost calendar.
Cauliflower Planting Dates for Louisiana
| Start seeds indoors | December 28–January 4 |
| Last frost (average) | February 1 |
| Transplant outdoors | January 11–21 |
| Expect first harvest | March 7 – April 21 |
| Fall crop start | October 6–16 |
| Fall harvest | November 30 |
| First fall frost (average) | December 15 |
Dates above assume Zone 8b, the most common zone in Louisiana. Gardeners in cooler New Orleans (Zone 8b) plant 1–2 weeks later; warmer Shreveport (Zone 8a) can plant 1–2 weeks earlier.
⚠ Start cauliflower indoors 4–6 weeks before last frost. Transplant 2–4 weeks before last frost. Needs consistent moisture and cool temps — bolts in heat above 75°F.
Growing Cauliflower in Louisiana's Climate
Louisiana's warm Zone 8b climate makes cauliflower a fall, winter, and early spring crop rather than a summer one. The cool-season window runs roughly October through April in Louisiana — plant outside this window and the cauliflower will bolt (send up a flower stalk and turn bitter) before it produces a harvestable crop.
Succession planting stretches the cauliflower harvest window. Sow small amounts every two weeks from October through February — you will have staggered harvests rather than a single wave to process all at once. Bolt-resistant varieties extend the usable window an extra three to four weeks into warming weather.
Common cauliflower pests to watch for in Louisiana include Cabbage Worm and Cabbage Looper. The first line of defense is companion planting: Onion and Celery planted nearby discourage several of these pests by confusing host-plant identification or repelling adults before they can lay eggs. Weekly garden walks in the early morning catch problems when they're still manageable.
Cauliflower Garden Calendar for Louisiana
| Month | Task | Notes |
|---|---|---|
| January | Transplant outdoors | Soil temp must be 45°F+; nighttime lows above 50°F |
| February | Harden off seedlings | Set seedlings outdoors 1–2 hours daily, increasing gradually |
| March | First harvest window opens | Cauliflower begins producing 55–100 days after transplant |
| April | — | Off-season |
| May ← | Watch for bolting | Harvest promptly; spring heat arrives quickly |
| June | — | Off-season |
| July | — | Off-season |
| August | — | Off-season |
| September | — | Off-season |
| October | Fall crop planting | Transplant or direct sow for fall harvest before frost |
| November | — | Off-season |
| December | Start seeds indoors | Use grow lights; warm soil to 70–75°F for best germination |
Cauliflower Growing Tips for Louisiana Gardeners
- •Blanch white varieties by tying outer leaves over the head when it reaches egg-size — prevents yellowing from sun exposure.
- •Keep soil evenly moist — drought stress causes small, bitter 'buttoning' heads instead of full curds.
- •Louisiana's cool-season cauliflower plants best in October, November, and December for winter and early spring harvest. Spring plantings bolt before producing a harvestable crop.
- •Plant fall crops in mid-July to mid-August for October harvest; fall cauliflower is usually larger and sweeter than spring.
Companion Planting for Cauliflower in Louisiana
In Louisiana's warm climate, planting cauliflower with Onion and Celery helps deter pests and improve soil. Avoid planting near Tomato and Strawberry, which inhibit cauliflower growth through root chemistry or shared pest pressure. See the full cauliflower companion planting guide for the complete list.
Cauliflower Planting Dates by City in Louisiana
Top cities in Louisiana — select for city-level frost dates and planting calendars.
Frequently Asked Questions
When should I plant cauliflower in Louisiana?
In Louisiana (Zone 8b), start cauliflower seeds indoors around December 28–January 4 and transplant outdoors around January 11–21 — 3 weeks before the state's average last frost of February 1.
What is the last frost date in Louisiana?
Louisiana's average last frost date is February 1 in the state's most common Zone 8b. Frost dates vary by city — higher elevations and northern counties run 1 to 3 weeks later than the state average. See the city list below for city-level frost dates.
Can I grow cauliflower year-round in Louisiana?
cauliflower is a cool-season crop in Louisiana, with spring and fall windows. Summer heat bolts the plants before they can produce a harvestable crop. Succession planting every 2–3 weeks stretches the harvest window.
What cauliflower varieties grow best in Louisiana?
For Louisiana's Zone 8b, consult a local nursery or extension office for cauliflower variety recommendations.
When do I start cauliflower seeds indoors in Louisiana?
Start cauliflower seeds indoors in Louisiana around December 28–January 4, which is 5 weeks before the state's average last frost of February 1. Use grow lights and keep soil temperatures at 70–75°F for fastest germination.