How to Grow Cauliflower
Brassica oleracea (Botrytis group)
The fussiest brassica — reward steady cool weather with snow-white curds.
By the Plants by Zone Editorial Team · Reviewed June 1, 2026
About cauliflower
Cauliflower is the most demanding member of the cabbage family, insisting on cool, even conditions and uninterrupted growth. Any check — heat, drought, or transplant shock — can cause it to "button" into tiny premature heads. Get the timing right, though, and it produces a beautiful dense curd.
When to plant and harvest cauliflower
Timing is relative to your frost dates. Find your USDA zone for exact dates, or browse the month-by-month calendars.
Start seeds indoors
6–8 weeks before last frost (spring) or midsummer (fall)
Transplant outdoors
2–4 weeks before last frost
Direct sow
Best for fall crops in midsummer
Harvest
Late spring or fall, in a tight window
How to grow cauliflower step by step
- 1
Start seeds 6–8 weeks ahead and avoid any stall in growth — pot up rather than letting roots crowd.
- 2
Transplant into very rich soil while weather is still cool.
- 3
Water generously and consistently; cauliflower hates drought.
- 4
For white varieties, blanch by tying outer leaves over the curd once it reaches egg size.
- 5
Feed steadily — interrupted growth ruins the head.
- 6
Harvest promptly once curds are full but still tight.
Common problems growing cauliflower
⚠ Tiny premature heads (buttoning)
Caused by any growth check — cold snaps, drought, or root-bound transplants. Keep growth fast and uninterrupted.
⚠ Loose, grainy "ricey" curds
From heat or over-maturity — grow in cool weather and harvest while curds are still tight.
⚠ Yellowing curds
Sun exposure — blanch white types by tying the leaves over the head, or grow self-blanching varieties.
✗ Keep away from
🧺 Harvesting cauliflower
Cut the entire head with a few wrapper leaves once the curd is full, firm, and tight — before it begins to separate or "rice." Unlike cabbage, the plant won’t produce a worthwhile second head, so pull it after harvest.
Cauliflower: frequently asked questions
Why did my cauliflower form a tiny head?＋
It "buttoned" from a growth check — cold, drought, or being root-bound at transplant. Keep cauliflower growing fast and never let it stall.
Do I need to blanch cauliflower?＋
Only white varieties exposed to sun. Tie the outer leaves over the curd once it’s egg-sized, or grow self-blanching or colored types that don’t need it.
Grow cauliflower in your zone
See exactly when to plant and what else to grow alongside cauliflower, tailored to your USDA hardiness zone.
