How to Grow Cabbage (Brassicas)

Cabbage (Brassicas)

Brassica oleracea

vegetable

Brassicas are a diverse family of cool-season cruciferous vegetables that includes cabbage, broccoli, cauliflower, kale, and Brussels sprouts. These nutrient-dense plants are staples in vegetable gardens worldwide, valued for their high vitamin C, fiber, and antioxidant content. They prefer cooler temperatures and can tolerate frost, making them excellent for spring and fall cultivation.

Looking for a specific variety?

Napa Cabbage Red Cabbage Green Cabbage Calabrese Romanesco Cavolo Nero Lacinato Curly Kale Red Burgundy Jade

Growing Conditions

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Sun: Full sun, 6-8 hours daily minimum

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Water: Consistent moisture, 1-2 inches per week; keep soil evenly moist but not waterlogged to prevent splitting and disease

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Spacing: 12-24 depending on variety (compact: 12-15 inches; large: 18-24 inches) inches

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Days to maturity: 55-120 days depending on variety and season

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Planting depth: 0.25-0.5 inches for seeds; transplants at soil line

Soil

Type: Rich, well-draining loamy soil with high organic matter

pH: 6.0-7.5

Amendments:

Compost aged manure bone meal kelp meal balanced fertilizer (10-10-10)

Growing Zones

Find your zone →

Zones 3-9; thrives best in cool seasons (spring and fall)

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b

Growth Stages

Seedling

2-3 weeks

True leaves appear after cotyledons; plant develops 2-4 leaves with characteristic cabbage family shape

Maintain consistent moisture and warmth (65-75°F); provide bright light to prevent legginess; thin to strongest seedlings

Vegetative Growth

3-6 weeks

Plant develops multiple leaves in rosette pattern; no head/curds form yet; steady leaf expansion

Keep soil consistently moist; begin fertilizing with balanced fertilizer every 2 weeks; monitor for pests; weed regularly; thin secondary seedlings

Head/Curd Formation

3-8 weeks

Leaves begin to overlap and compact inward; head tightens (cabbage) or curds develop (broccoli/cauliflower/kale produces leaves only)

Maintain even watering to prevent splitting; reduce nitrogen fertilizer, increase potassium; provide consistent cool temperatures; protect from extreme heat; stake if needed

Maturity & Harvest-Ready

1-3 weeks (harvest window)

Heads are firm and dense (cabbage); curds are tight and uniform color (broccoli/cauliflower); kale and Brussels sprouts develop sprouts/leaves to full size

Stop heavy fertilization; harvest main head/curd promptly to encourage side shoots on some varieties; monitor for late-season pests

Post-Harvest & Secondary Growth

2-4 weeks additional harvest

After main head harvest, smaller secondary heads/shoots develop on cut stem

Continue watering and light fertilizing to support secondary growth; protect from frost if applicable

Companion Planting

Plan your garden →

Plant with:

Beets Celery Chard Onions Potatoes Spinach Thyme Dill Chamomile Marigolds Nasturtiums

Avoid planting near:

Fennel Tomatoes Strawberries Pole beans Rue

Common Pests

Hand-pick caterpillars; apply Bacillus thuringiensis (Bt); use row covers on young plants; encourage parasitic wasps
Spray with neem oil or Bt; remove by hand; introduce parasitic wasps; use kaolin clay
Row covers on seedlings; diatomaceous earth; kaolin clay spray; neem oil
Strong water spray to dislodge; insecticidal soap; neem oil; introduce ladybugs or lacewings
Remove by hand; Bt spray; pheromone traps; encourage predatory insects
Rotate crops; improve soil drainage; add lime to raise pH; remove infected plants; use resistant varieties
Remove infected leaves; improve air circulation; avoid overhead watering; use disease-free seeds; rotate crops

Uses

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Fresh and cooked vegetables

Culinary

Brassicas are versatile in the kitchen—eaten raw in salads and slaws, steamed, roasted, stir-fried, or fermented into sauerkraut and kimchi. Each variety offers distinct flavors and textures. [source]

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Cancer-fighting compounds

Medicinal

Brassicas contain glucosinolates and their metabolite sulforaphane, which have been extensively studied for anti-cancer, anti-inflammatory, and antioxidant properties. Regular consumption is associated with reduced cancer risk. [source]

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High vitamin C and K content

Medicinal

Brassicas are excellent sources of vitamin C (immune support) and vitamin K (bone health and blood clotting). One serving provides significant daily requirements. [source]

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Fermentation and preservation

Household

Brassicas, especially cabbage, are traditional fermentation vegetables that create probiotics, enhance gut health, and provide long-term storage solutions with minimal processing. [source]

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Butterfly and pollinator support

Wildlife

Brassica flowers (especially when allowed to bolt) are excellent nectar sources for bees, butterflies, and beneficial insects. Flowering plants support pollinator populations. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Cabbage: harvest when heads are firm and full-sized; cut at base with sharp knife. Broccoli/Cauliflower: cut main head 5-8 inches below flower when curds are tight and uniform; secondary sprouts follow. Kale: pick outer leaves first or harvest whole plant; flavor improves after frost. Brussels sprouts: pick from bottom up when 1-2 inches in diameter. Store in cool area; most brassicas last 2-4 weeks refrigerated.

Fun Facts

🌱 All brassicas (cabbage, broccoli, cauliflower, kale, Brussels sprouts, kohlrabi, bok choy) are the same species (Brassica oleracea) but have been selectively bred over centuries to emphasize different plant parts—leaves, florets, buds, or stems.
🌱 Kale becomes sweeter after a frost because starches convert to sugars, a process called 'kale's kiss.' This is why fall-harvested kale has superior flavor.
🌱 Brussels sprouts are miniature cabbage heads that grow along a tall central stalk, each sprout being a complete miniature head. A single plant can produce 50-100 sprouts.

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