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Crop Guide

How to grow cauliflower

Brassica · Water-sensitive · Frost-tolerant

Primary source · UMN Extension
Cauliflower
Moisture range
40–60%
Days to maturity
70–100
Light
Full sun
Growing Degree Units
1250 · base 40°F
When to plant cauliflower where you garden
Indoor-start, transplant and harvest dates, counted from your own frost dates.
See planting calendar →
or the link above opens zone 6b to browse.

Growing notes

For the best quality cauliflower, grow it in rich, moist soil without drought stress. Dense, flavorful curds grow in cool temperatures, between 50°F and 70°F.

Harvest signs

when heads reach usable size, before the flower buds open. Heads should be smooth, firm, and compact

Planting referenceDepth, spacing, pH, light
Depth
one-fourth to one-half inch deep
Spacing
18 inches apart · Rows: 24 to 30 inches apart
pH range
6–7
Light
Full sun (6+ hr direct)
Pests & diseasesflea beetles, imported cabbage worm, cabbage looper, diamondback moth, +6 more
Common pests · 7
Flea beetles: chew small holes in leaves (Seedlings are most vulnerable to injury from this feeding)
Imported cabbage worm: larvae feed on the leaves (Young seedlings and transplants are most vulnerable to injury from this feeding)
Cabbage looper: larvae feed on the leaves (Young seedlings and transplants are most vulnerable to injury from this feeding)
Diamondback moth: larvae feed on the leaves (Young seedlings and transplants are most vulnerable to injury from this feeding)
Cabbage maggots: feed on the roots, injuring the plants, sometimes killing them
Swede midge: can cause cauliflower to produce no crown
Cabbageworms: eat large, irregular holes in the foliage
Common diseases · 3
Alternaria: causes spots on leaves and the crowns of cauliflower to rot
Black rot: causes yellow triangles on the edge of leaves and can cause rot in the cauliflower crowns
Clubroot: attacks cauliflower roots, causing roots to be swollen and plants to be stunted

Companions & antagonists

Plant near:DillMarigold
Keep apart from:Tomato
Tip: Blanch heads by tying leaves over curd.

Common questions

How much water does cauliflower need?

Cauliflower is water-sensitive — shallow roots and a steady thirst. Keep soil moisture in roughly the 40–60% range and don't let it dry out fully, or growth stalls and leafy crops turn bitter.

Can I grow cauliflower in a raised bed or container?

Yes — cauliflower does well in raised beds and is happy in a decent-sized container too, as long as drainage is good.

Does cauliflower come back every year?

No — cauliflower is an annual. It completes its life in one season, so you replant it each year.