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Cauliflower is the least forgiving brassica: it needs uninterrupted, steady growth in cool weather (13-21°C), rich soil, and consistent water — any stress produces tiny 'button' heads. Space plants 45-60cm apart, net against cabbage worms, and fold leaves over the developing white curd to keep it from yellowing. Harvest at 55-100 days from transplant while the curd is still tight. Seed packets run $2-4, seedling six-packs $4-8.
Key facts
- The white 'curd' is thousands of undeveloped flower buds — the same species as cabbage, broccoli, and kale, bred for a different organ.
- The fussiest common brassica: any growth check (heat, drought, root disturbance) can cause 'buttoning' — tiny premature heads that never size up.
- White varieties need blanching — folding or tying the leaves over the curd — to stay white; self-blanching and coloured varieties (purple, orange, romanesco) skip this step.
- Strictly cool-season: curds forming above ~27°C turn loose, ricey, and bitter.
Care requirements#
| Plant type | Outdoor cool-season annual (biennial by nature) |
| Growing medium | Deep, rich, moisture-retentive soil heavily amended with compost; possible in 25L+ containers but demanding |
| Light needs | Full sun, 6+ hours daily |
| Water frequency | Absolutely consistent — 2.5-4cm (1-1.5in) per week; even one dry week can trigger buttoning |
| Sowing season | Northern hemisphere: indoors Feb-Apr for early summer, Jun-Jul for autumn harvest. Southern hemisphere: Aug-Oct and Jan-Feb |
| Spacing | 45-60cm between plants, 60-75cm between rows — wider than cabbage |
| Temperature range | Best at 13-21°C (55-70°F); curds spoil above 27°C and young plants button after prolonged cold below 10°C |
| Fertilizer | Very heavy feeder — compost plus balanced fertilizer at planting, nitrogen side-dress 3-4 weeks in; boron deficiency causes hollow stems |
| Soil pH | 6.5-7.5; liming also suppresses clubroot |
| Blanching | When the curd reaches egg size, fold outer leaves over it and clip — keeps white varieties white |
| Pest protection | Insect netting from transplant day against cabbage whites and root fly |
| Toxicity | Non-toxic; edible crop safe around pets and children |
Growth & propagation#
| Days to harvest | 55-80 days from transplant for summer types; overwintering types 100+ days |
| Yield per plant | One head of 500g-1.5kg; no regrowth after cutting (unlike broccoli's side shoots) |
| Edible parts | Curd primarily; leaves and stem are edible cooked |
| Propagation methods | Seed only — start in modules and transplant at 4-5 leaves with minimal root disturbance |
| Harvest cue | Curd full-size but still tight and compact; cut with several wrapper leaves before florets begin to separate ('rice') |
| Storage | 2-3 weeks refrigerated; florets freeze well after blanching in boiling water |
Common problems & troubleshooting#
| Symptom | Likely cause | Fix |
|---|---|---|
| Tiny golf-ball head on a small plant ('buttoning') | Any growth check — drought, heat, cold snap, root-bound transplants, or poor soil | No recovery for that plant; replant with fresh stocky seedlings, keep water constant, and transplant before roots circle the cell |
| Holes in leaves, caterpillars present | Cabbage worms and loopers from white butterflies | Hand-pick, spray Bt, and cover with fine insect netting from day one |
| Curd turns yellow-brown and coarse | Sun exposure on white varieties, or heat during curd formation | Blanch by folding leaves over the curd at egg size; time crops so heads form in cool weather |
| Wilting despite moist soil, swollen deformed roots | Clubroot fungus in the soil | Remove and bin plants, lime to pH 7.2+, rotate brassicas out of the bed for 4-7 years |
| Loose, grainy, separated curd ('ricing') | Harvested too late, or temperature swings during maturation | Still edible but past prime — harvest earlier while the curd is tight; grow autumn crops where summers run hot |
Stop stress before it buttons your heads
Sodate flags heat spikes and missed waterings early — the exact stresses that make cauliflower button instead of heading.
Seasonal care#
Varieties & cultivars#
| Variety | Distinguishing trait | Note |
|---|---|---|
| 'Snowball' types | Classic early white, ~55-65 days, compact | Needs blanching |
| 'Cheddar' (orange) | Orange curd, high beta-carotene, no blanching needed | Holds colour when cooked |
| 'Graffiti' (purple) | Vivid purple curd from anthocyanins | Colour fades to green when boiled |
| Romanesco | Lime-green fractal spiral curd, nutty flavour | Technically its own botrytis type; long season |
Buying checklist#
- Seedlings young and stocky with 4-5 leaves — overgrown or root-bound cauliflower transplants button
- No purple stress tint or yellowing on seedlings
- Check roots: white and uncircled, no clubroot swellings
- Pick a variety matched to your season — early summer types vs autumn/overwintering types are not interchangeable
- Coloured and self-blanching varieties save the leaf-tying step
Pricing by region#
| Region | Price range | Typical unit | Basis |
|---|---|---|---|
| US | $2 – $8 | Seed packet / seedling six-pack | Garden centre + seed catalogue retail |
| UK | $2 – $7 | Seed packet / strip of plugs | Garden centre retail |
| India | $0.25 – $1.2 | Seed packet / seedling tray share | Agri supply + local nursery |
| Australia | $2 – $7 | Seed packet / punnet | Nursery + hardware garden centre |
| Canada | $2 – $7 | Seed packet / seedling six-pack | Garden centre retail |
USD figures are approximate conversions for comparison; switch the dropdown to see each region's actual local-currency listing price.
Often confused with#
Name confusion warning#
"Broccoli" vs "cauliflower" labels blur at the market. Romanesco is sold as both, and in parts of the US, heading "broccoli" historically meant cauliflower. Check the picture and variety name on the packet, not just the common name.
Where it's actually grown#
Transplants are raised in regional greenhouses close to market since cauliflower seedlings tolerate shipping poorly and button if root-bound. Commercial seed production is concentrated in dry-summer regions of the Pacific Northwest (US), France, Italy, and increasingly India, which is also the world's second-largest cauliflower producer after China.
Import & biosecurity restrictions#
| Region | Note |
|---|---|
| Australia | Personal live-plant imports prohibited under biosecurity law; seed imports need permits. Buy domestic seed and punnets. |
| US | Domestic sale unrestricted; interstate brassica transplant movement can be regulated where clubroot is a concern. |
| UK | Home seed imports generally fine; commercial material needs phytosanitary certificates. |
| India | No domestic restriction; huge domestic seed market for tropical-adapted varieties. |
| Canada | CFIA import rules for commercial seed; home-garden packets typically clear. |
Similar plants
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Frequently asked questions
Why did my cauliflower make a tiny head?
That's 'buttoning', caused by any check to steady growth — drought, heat, a cold snap, or root-bound transplants. The plant won't recover; replant and keep conditions constant next time.
How long does cauliflower take to grow?
Roughly 55-80 days from transplant for summer varieties, and 100+ days for overwintering types. Add 4-6 weeks if starting from seed.
Do I need to blanch cauliflower?
For white varieties, yes — fold the outer leaves over the curd when it reaches egg size to keep sun off. Self-blanching, orange, purple, and romanesco types don't need it.
Does cauliflower regrow after harvest like broccoli?
No. Cauliflower produces one curd per plant with no worthwhile side shoots, so pull the plant after cutting.
Is cauliflower harder to grow than cabbage or broccoli?
Yes — it's the most demanding common brassica. It needs richer soil, steadier water, and a narrower temperature window; most failures come from stress during the first two months.
