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Plant library

Brassica · Cool season

Cauliflower

Cauliflower

Cauliflower: crop reference photographCrop reference
Sun

Full sun; at least 6–8 hours of direct sunlight daily.

Water

Aim for about 1 inch of water per week including rain; check soil 1 inch down and water at the roots when it begins to dry. Raised beds may need more frequent watering in heat. Keep moist, never waterlogged.

Spacing

18–24 in

Difficulty

Easy–Moderate

Planting and care

How to grow cauliflower

When to grow

Cool season · Annual

How to start

Usually transplant

Mature size

18–36 in

Time to harvest

About 55–90 days from transplant; development is sensitive to temperature.

Feeding needs

Heavy feeder

Growth habit

Brassica

How to prune

Keep healthy outer leaves. For white cultivars requiring blanching, loosely tie leaves over the developing curd when about 2–3 inches wide, keeping it dry; self-blanching types may not need this.

How to harvest

Cut the head with a few wrapper leaves when compact and firm, before florets separate or become rice-like. Usually one main harvest per plant.

Harvest and kitchen use

Raw, steamed, roasted, fermented or cooked depending crop

Nutrition and garden value

Vitamin C/K, folate and glucosinolate compounds

Productive cool-season anchor crop

Common challenges and troubleshooting

Cabbage worms, aphids and heat stress