When to Plant Cauliflower in Durham, NC
Published: April 24, 2026
Cauliflower Planting Dates for Durham, NC
| Start seeds indoors | February 8–15 |
| Last frost (average) | March 15 |
| Transplant outdoors | February 22–March 4 |
| Minimum soil temperature | 45°F |
| Expect first harvest | April 18 – June 2 |
| Fall crop planting | September 6–16 |
| Fall crop harvest | October 31 |
| First fall frost (average) | November 15 |
⚠ 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.
Best Cauliflower Varieties for Durham, NC
Consult a Durham-area nursery or your state extension office for cauliflower varieties proven in Zone 7a.
Growing Cauliflower in Durham
Durham sits in Zone 7a, with an average last frost of March 15 and first fall frost around November 15 — giving a 245-day frost-free growing season. Cool-season crops like cauliflower benefit from Durham's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
Durham's moderate climate supports cauliflower on the standard transplant calendar with minimal special accommodation. Succession planting — sowing fresh seeds or setting new transplants every 2–3 weeks through spring — stretches the harvest window and gives you a backup crop if pests hit the first planting.
Durham's heavy clay soil benefits from raised beds or deep organic matter amendment before planting cauliflower. Clay retains moisture well but compacts easily — add 3 to 4 inches of compost and work it in to 12 inches before planting. Consistent watering (1.5 inches per week) is especially important in clay soil, which can crack and pull away from roots during dry spells; mulch around plants to stabilize moisture.
Cauliflower Calendar for Durham
| Month | Task |
|---|---|
| February | Start seeds indoors under grow lights |
| March | Last frost — harden off seedlings outdoors |
| February | Transplant outdoors into warm soil |
| April | Expect first harvest window to open |
| September | Start fall crop — transplants or direct sow |
| November | First fall frost — harvest remaining, end of outdoor season |
Cauliflower Tips for Durham 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.
- •Succession plant cauliflower in Durham every 2–3 weeks through spring to extend the harvest window into summer.
Common Cauliflower Pests in Durham
- •Cabbage Worm — peaks July in Zone 7a (active May–September); green caterpillars on brassicas; apply Bt spray or use row covers.
- •Cabbage Looper — peaks July in Zone 7a (active May–September); loop-walking green caterpillars; Bt spray works well.
- •Aphid — peaks July in Zone 7a (active May–September); monitor closely during peak season and treat early.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Cauliflower in Durham
In Durham's moderate climate, Onion and Celery are the most beneficial plants to grow alongside cauliflower. Onion deters carrot fly, aphids, and several root-zone pests through sulfur compounds. Keep cauliflower away from Tomato — it competes for nutrients or shares pest pressure.
Frequently Asked Questions
When should I plant cauliflower in Durham, NC?
In Durham (Zone 7a), start cauliflower seeds indoors around February 8–15 and transplant outdoors around February 22–March 4. The city's average last frost of March 15 is the anchor date — count 5 weeks back for seed starting and 3 weeks back for transplanting.
What zone is Durham, NC for cauliflower growing?
Durham is USDA Zone 7a. For cauliflower, this means a frost-free growing season of roughly 35 weeks running from March 15 to November 15. Cool-season crops like cauliflower thrive in this zone with both spring and fall planting windows available.
When is cauliflower harvest season in Durham?
Expect the first cauliflower harvest in Durham around April 18, with harvest continuing through June 2. This is based on 55–100 days from transplant or direct sow. A fall crop planted September 6–16 adds a second harvest around October 31.
How long does it take to grow cauliflower in Durham, NC?
From transplant or direct sow to first harvest, cauliflower takes 55–100 days in Durham's climate. Based on a typical planting date of February 22–March 4, expect your first harvest around April 18. Durham's Zone 7a transition-zone climate produces maturity times right in the middle of the stated range.
What soil does cauliflower need in Durham?
Durham's heavy clay soil compacts easily and drains slowly — problematic for cauliflower which needs oxygenated roots. Build a raised bed or amend deeply with 3–4 inches of compost worked into the top 12 inches. Add gypsum if the soil is severely compacted. Consistent watering matters especially in clay because the soil can crack and pull away from roots during dry spells.