Cabbage

Choosing & planning

What is cabbage and where does it grow best?

Cabbage (Brassica oleracea) is a cool-season leafy vegetable forming a compact head of 1–8 lb depending on variety. It originated in the Mediterranean and grows best at 55–75°F in full sun and fertile, well-drained soil. China is the world’s largest producer, accounting for more than half of global production.

What are the main types of cabbage, and how do they differ?

Green cabbage has round, tightly packed, mild-flavored heads. Red or purple cabbage is slightly sweeter or peppery and popular for braising or pickling. Savoy cabbage has crinkled, tender leaves. Napa (Chinese) cabbage has elongated, milder leaves used in Asian cuisine. Bok choy is an open-leaf Chinese type with white stalks and dark green leaves. Cabbages are also grouped by harvest season: spring, summer, fall, and winter.

Which cabbage varieties are recommended, and how do I choose one?

For early harvest, try ‘Primo’, ‘Stonehead’, or ‘Golden Acre’ (65 days). ‘Early Jersey Wakefield’ resists splitting and yields 2–3 lb pointed heads; ‘Gonzales’ produces softball-sized heads for small gardens. Disease-resistant options include ‘Blue Vantage’ and ‘Cheers’. For fall, ‘Integro’ or ‘Ruby Perfection’ (reds) perform well; for long-term cellar storage, ‘Danish Ballhead’ (100 days) is a classic. Choose by season length, head size, and end use—fresh eating, fermenting, or storage.

What should I look for when buying cabbage seeds or transplants?

Buy clean, healthy transplants to avoid black rot—early symptoms are stunting, yellowing leaves, and blackening veins. Transplants should have 4–6 mature leaves and a well-developed root system, which requires about 6–7 weeks of growth. Starting in modules lets you select only the most vigorous seedlings for the garden.

Can I grow cabbage in my climate or hardiness zone?

Cabbage grows best at 55–75°F and tolerates temperatures as low as 25°F without serious damage. Temperatures above 80°F reduce growth and quality. In mild, moderate climates, cabbage can be harvested all winter; in hot regions, time planting so the crop matures before peak summer heat.

Can I grow cabbage in containers or pots, and what size do they need?

Yes, cabbage grows in containers filled with premium potting mix using the same spacing and care as in-ground planting. Avoid over-watering in containers or raised beds, as excess moisture causes root rot. Specific minimum pot sizes are not addressed in the available sources.

Can I grow cabbage indoors or in a greenhouse?

Cabbage seeds are routinely started indoors 4–8 weeks before transplanting outside. For fully indoor growing, use a south-facing window or a full-spectrum grow light to provide the 6–8 hours of daily light the plant requires.

Starting from seed & propagation

Should I start cabbage from seed or buy transplants?

Both options work. Starting indoors gives more variety choice; transplants are more convenient and produce an earlier harvest. In spring, the short cool season makes transplants the preferred approach. For fall crops, seeds can be direct-sown into warm garden soil in summer.

When should I start cabbage seeds indoors?

Start seeds indoors 4–8 weeks before the planned outdoor transplant date. For spring planting, sow 4–6 weeks before the last frost. For fall crops, start transplants indoors 4–5 weeks before the mid-June to mid-July outdoor planting window.

How deep should I sow cabbage seeds?

Sow cabbage seeds ¼–½ inch deep; ¼ inch is the standard depth for both indoor starts and direct outdoor sowing. Sow 2–3 seeds per cell or spot and thin to one plant when seedlings reach about 3 inches tall.

What temperature do cabbage seeds need to germinate?

Cabbage seeds germinate best at 65–70°F. For direct outdoor sowing, wait until soil temperatures reach at least 55°F.

How long do cabbage seeds take to germinate?

Cabbage seeds typically germinate in 7–12 days under adequate moisture and temperature.

How do I harden off cabbage seedlings before transplanting?

Over about a week, gradually expose seedlings to outdoor conditions. Start in a shady, protected spot, then progressively increase direct sunlight exposure each day until plants can tolerate full outdoor conditions.

Why are my cabbage seedlings leggy or weak?

Leggy, weak seedlings are almost always caused by insufficient light. Without 6–8 hours of bright daily light, cabbage develops spindly stems unable to support a forming head. Move seedlings to a sunnier location or add a grow light.

Site, soil & timing

How much sun does cabbage need?

Cabbage needs at least 6 hours of direct sunlight per day; 6–8 hours is optimal for head formation and flavor, with some sources recommending up to 8–10 hours. In hot climates, afternoon shade can keep soil cool and reduce heat stress.

What type of soil does cabbage prefer?

Cabbage prefers fertile, moist, well-drained soil rich in organic matter. Loamy or clay-based soils that retain moisture work well. Sandy soils are typically too nutrient-poor and must be amended with compost.

What soil pH does cabbage need?

The ideal soil pH is 6.0–7.0, with 6.5 optimal. This range maximizes nutrient availability and suppresses clubroot disease, which thrives below pH 6.0. Soil above pH 7.0 can lock out micronutrients like iron and manganese, causing pale or mottled leaves.

How should I prepare and amend the soil for cabbage?

Take a soil test and follow its recommendations before planting. Work fertilizer and compost into the top 6 inches; apply no more than 1 inch of well-composted organic matter per 100 square feet. Without a soil test, incorporate nitrogen-rich amendments such as composted manure or blood meal plus a balanced granular vegetable fertilizer.

When should I plant cabbage outdoors?

Transplant spring cabbage 2–4 weeks before the last expected frost. For fall crops, transplant between mid-June and mid-July in northern areas, timing maturity about 1–2 weeks after the first fall frost; alternatively, plant fall transplants 6–8 weeks before the first frost.

Does cabbage tolerate frost, heat, or drought?

Cabbage tolerates light frost and survives temperatures as low as 25°F; cold-hardened plants taste sweeter after a light freeze. Temperatures above 80°F reduce growth and quality and may cause internal tipburn. Cabbage dislikes drought—consistent, even soil moisture is essential and irregular watering causes head splitting.

Planting

How far apart should I space cabbage plants?

Space plants 12–24 inches apart within the row depending on variety; smaller types need 12–16 inches and large-heading varieties 18–24 inches. For seed-saving, increase spacing to 18–24 inches. More space generally produces larger heads.

How far apart should the rows be?

Row spacing is typically 24–36 inches, with 2–3 feet being the most common recommendation. Wider spacing of 36–44 inches is used when growing plants for seed.

How deep should I plant cabbage?

Set transplants so that 1–2 inches of the main stem is buried below the soil surface, with the lowest leaves sitting just above ground level. This anchors the plant and encourages strong root development.

Are there special planting techniques for cabbage?

In spring, plant transplants through black plastic mulch to warm the soil and allow earlier establishment. Ensure soil is firm before planting to prevent air pockets around roots. Consult the seed packet for expected head size to determine correct spacing.

What grows well next to cabbage (companion plants)?

Nasturtiums repel aphids and beetles; sage may deter cabbage moth. Chamomile, chives, and rosemary are listed as compatible herb companions. Vegetables including beans, peas, carrots, celery, potatoes, and chard grow well alongside cabbage, helping attract beneficial insects, fix nitrogen, and deter pests.

What should I avoid planting near cabbage?

Avoid strawberries, leeks, onions, and other cruciferous plants (broccoli, cauliflower, kale) near cabbage. Cruciferous relatives share the same pests, diseases, and heavy nutrient demands, amplifying problems when grouped together. Strawberries are consistently listed as a poor companion across multiple sources.

Watering

How much and how often should I water cabbage?

Cabbage needs 1–2 inches of water per week from rain and irrigation combined. Water deeply and infrequently while maintaining even soil moisture; never let the soil dry out completely, as irregular moisture is a primary driver of head splitting.

What is the best way to water cabbage?

Water at the base of the plant in the early morning so foliage dries during the day, reducing fungal disease risk. Drip irrigation or soaker hoses are preferred because they keep foliage dry, deliver water directly to the root zone, and minimize evaporation.

What are the signs of over- or under-watering cabbage?

Over-watering, especially in containers or raised beds, can cause root rot. Inconsistent moisture—dry periods followed by heavy irrigation or rainfall—is the primary cause of head splitting at maturity. Under-watering stresses the plant and slows head development.

Should I mulch cabbage, and with what?

Yes. Apply a 3-inch layer of plastic or organic mulch around the base of cabbage plants. Mulch conserves moisture, suppresses weeds, moderates soil temperature, and reduces soil splash onto leaves that can spread disease.

Feeding & fertilizing

How should I fertilize cabbage?

Work a slow-release granular fertilizer and compost into the top 6 inches of soil before planting. Side-dress with additional nitrogen-rich fertilizer about 4 weeks after transplanting. Stop all fertilization once heads begin to form, as excess nutrients at that stage cause excessive leaf growth and head splitting.

What fertilizer or nutrients does cabbage need?

Cabbage is a heavy feeder that thrives with a balanced fertilizer such as 10-10-10, or nitrogen-rich amendments like blood meal, cottonseed meal, or composted manure. Nitrogen is the most critical nutrient for leafy development; calcium, magnesium, phosphorus, and potassium are also important.

When and how often should I feed cabbage?

Apply a complete fertilizer before planting, incorporated into the soil. Side-dress with nitrogen about 4 weeks after transplanting to sustain strong growth. Stop feeding once heads start to form. Liquid fertilizer can substitute for granular side-dressing.

What are the signs of nutrient deficiency in cabbage?

Purple-tinged leaves may indicate phosphorus deficiency or early fungal disease. Leaf tip burn, weak or spindly growth, and yellowing leaves can result from calcium or magnesium deficiency, often triggered by soil pH below 6.0. General yellowing starting at the plant base is a common sign of nitrogen deficiency.

Support, training & pruning

Does cabbage need staking, caging, or a trellis?

Standard cabbage grown for heads requires no staking, caging, or trellis. When growing cabbage for seed in its second year, staking is recommended to support the tall flowering stalks.

How do I support cabbage as it grows?

Normal heading cabbage requires no support structure. When growing plants for seed production in their second year, stake the tall flowering stalks to prevent them from toppling.

Should I prune, train, or remove suckers from cabbage?

Selectively remove outer leaves that are yellowing, damaged, diseased, or touching the ground. This improves air circulation, lowers humidity at the plant base, reduces fungal disease risk, and directs energy toward a larger, denser head. Use clean sharp shears sterilized with alcohol or a 10% bleach solution between plants, and leave most healthy outer leaves intact as they protect the developing head.

Pollination & fruit set

Why is my cabbage flowering but not setting fruit?

Cabbage is biennial and produces seeds only in its second year after a cold vernalization period. A head grown in the first season will not set seeds. If plants bolt and flower prematurely in the first year, it is typically due to temperature stress rather than a pollination issue.

Pests

What pests commonly attack cabbage?

The most common pests are caterpillars—imported cabbageworm, cabbage looper, diamondback moth larvae, cross-striped cabbageworm, and beet armyworm—which feed on leaves and heads. Other frequent pests include cabbage aphids, flea beetles, harlequin bugs, leaf miners, slugs, and snails. Rabbits and pigeons can also cause significant damage.

How do I identify cabbage pest damage?

Cabbage loopers (light green, 1–1.5 inches, loop when walking) leave large irregular holes between leaf veins with frass at the head base. Diamondback moth larvae (tiny, yellowish-green, forked tail) create small holes or a ‘windowpane’ where only the upper leaf surface remains. Imported cabbageworms (fuzzy, ~1 inch, green) chew holes throughout leaves. Aphids (grey clusters, 2–2.5 mm) cause leaf curl, yellowing, and wilting.

How do I prevent cabbage pests?

Fit each seedling with a 4-inch cardboard cutworm collar at planting. Cover plants with row cover or fine netting to exclude caterpillars, flea beetles, and pigeons. Scout frequently—check leaf undersides and the base of heads for eggs and larvae, especially early in the season. Rotate cabbage to a new garden location every 2–3 years. Use 30-inch-tall chicken wire fencing to exclude rabbits.

How do I control cabbage pests organically and chemically?

Spray aphids with insecticidal soap and use Spinosad (a naturally derived insecticide) for caterpillars including cabbage loopers and cabbageworms. Neem oil also suppresses soft-bodied insects. Hand-pick caterpillars and drop them in soapy water. Pheromone traps detect cabbage looper adult moths to time spray applications. Target young, small larvae—large larvae are much harder to control.

Diseases

What diseases commonly affect cabbage?

Common diseases include black rot (bacterial), clubroot (soilborne), downy mildew (fungal), Alternaria leaf spot or dark leaf spot (fungal), and white mold. Black rot and clubroot are the most damaging and nearly impossible to eradicate once the soil is infested.

How do I recognize cabbage disease symptoms?

Black rot shows yellow V-shaped patches at leaf edges spreading inward, with veins turning black and leaves wilting. Clubroot causes swollen, deformed roots; plants look stunted, wilt during the day, and recover at night. Downy mildew produces a whitish downy fuzz on leaf undersides with yellow patches above. Alternaria leaf spot appears as dark brown to grey circular spots with concentric rings that merge into irregular dead areas followed by general leaf yellowing.

How do I prevent cabbage diseases?

Rotate cole crops so they are not grown in the same spot more than once every 3–4 years. Buy clean transplants to avoid introducing black rot. Water in the early morning so foliage dries during the day. Maintain soil pH at 6.5 to suppress clubroot. Remove diseased leaves to improve airflow and sterilize pruning tools between plants.

How do I treat or manage cabbage diseases?

Once clubroot or black rot are established, remove and dispose of affected plants away from the garden—never compost diseased material. For Alternaria leaf spot, promptly remove affected leaves to limit spread. Maintain proper soil pH, good drainage, and airflow through pruning of lower leaves. A 3–4 year crop rotation is the most effective long-term strategy.

Disorders & troubleshooting

What physiological disorders affect cabbage (such as blossom-end rot, cracking, or sunscald)?

Head splitting (cracking) is the primary physiological disorder in cabbage. It occurs when a mature head takes up water rapidly—from heavy rainfall or resumed irrigation after a dry period—causing the interior to expand faster than the outer leaves can stretch.

What causes these disorders and how do I prevent them?

Head splitting is caused by inconsistent irrigation or heavy rainfall once heads mature, and by excess nitrogen fertilization during head formation. Prevent it by maintaining even soil moisture throughout the season, stopping fertilization once heads begin to form, and harvesting promptly as soon as the head is firm.

Why are my cabbage leaves yellowing, curling, or spotted?

Yellowing following vein patterns outward from leaf edges suggests black rot. Leaf curl combined with yellowing and wilting is a sign of aphid infestation. Purple-tinged leaves may indicate phosphorus deficiency or early fungal disease. Dark spots with concentric rings point to Alternaria leaf spot. General yellowing at the plant base often signals nitrogen deficiency or soil pH problems.

Why is my cabbage not growing or producing well?

High temperatures above 80°F are the most common cause of poor growth and quality. Insufficient sunlight leads to loose, poorly formed heads, pale leaves, and delayed maturity. Soil pH outside the 6.0–7.0 range limits nutrient uptake and stunts growth. Inconsistent watering and nutrient deficiencies are also frequent culprits.

Harvest

How long does cabbage take to mature?

Cabbage takes 60–100+ days from transplanting to harvest. Early-season cultivars mature in approximately 60–65 days, mid-season varieties in 70–85 days, and late or storage varieties in 100 days or more. Growing from seed adds roughly 6–7 weeks to these timelines.

How do I know when cabbage is ready to harvest?

A head is ready when it reaches full size for its variety and feels firm and solid throughout when squeezed. If it presses in easily and feels loose, it needs more time. Harvest before the head cracks or splits open.

How do I harvest cabbage correctly?

Cut the cabbage head at the base of the plant as low as possible using a sharp knife or pruning shears. Leave the loose outer wrapper leaves attached to the stalk at harvest; these protect the head during storage. Trim off severely damaged outer leaves before storing.

How much can I expect to harvest from one cabbage plant?

Each plant produces one head ranging from 0.5 to 3.6 kg (1–8 lb) depending on variety. Most standard varieties yield heads in the 1–3 lb range.

Storage, preservation & seed saving

How should I store fresh cabbage, and how long does it keep?

Store unwashed cabbage with outer leaves intact in the refrigerator crisper drawer, wrapped in a paper towel or perforated plastic bag; it keeps 3 weeks to 2 months this way. In optimum root cellar conditions—32–40°F and 80–90% relative humidity—cabbage can keep up to 4 months. Keep it away from ethylene-producing fruits like apples, which speed spoilage.

How can I preserve cabbage (canning, freezing, or drying)?

To freeze, cut cabbage into smaller pieces, blanch briefly, drain and dry, seal in freezer bags with excess air removed; frozen cabbage keeps 10–12 months. Cabbage is also widely fermented into sauerkraut or kimchi, which preserves it long-term and adds probiotic benefits.

How do I save seeds from cabbage for next year?

Cabbage is biennial and produces seeds only in its second year after 10–12 weeks of vernalization at around 50°F. Overwinter plants in the field if temperatures stay reliably above 35°F; otherwise dig plants before frost, trim outer leaves, and store at 34–39°F with 80–95% relative humidity in a root cellar or unheated shed. Replant in spring spaced at least 36 inches apart with staking recommended; separate varieties by 800 feet to ½ mile to prevent cross-pollination. Save seeds from at least 5 plants, or 20–50 plants for long-term variety maintenance.

Uses & nutrition

What is cabbage commonly used for in cooking?

Cabbage can be eaten raw in coleslaw and salads, steamed, roasted, braised, boiled, stir-fried, or added to soups and stews. Leaves can be stuffed with fillings or used as wraps in place of tortillas. It is also widely fermented to make sauerkraut and kimchi.

What are the nutritional benefits of cabbage?

Cabbage is low in calories (about 25 calories per cup) and high in fiber, vitamins C and K, and potassium. It contains antioxidants and anti-inflammatory compounds, and its soluble fiber supports beneficial gut bacteria and aids digestion. Fermenting cabbage into sauerkraut or kimchi adds additional probiotic benefits.

Season extension & regional growing

How can I extend the cabbage growing season?

Use frost cloth or row cover to protect plants from late spring or early fall freezes, extending the growing window by several weeks. In spring, planting through black plastic mulch warms the soil for earlier transplanting. In mild winter regions, frost cloth can protect plants for a nearly year-round harvest.

Can I grow a fall or second crop of cabbage?

Yes. Cabbage can be planted twice a year—spring and summer—for two harvests. For a fall crop in northern areas, transplant between mid-June and mid-July using only early-season cultivars; expect harvest from mid-September to late October. Alternatively, plant fall transplants 6–8 weeks before the first frost.

How do I grow cabbage in a particularly hot or cold region?

In hot regions, choose heat-tolerant varieties like ‘Charleston Wakefield,’ time planting for spring or fall maturity before peak heat, and provide afternoon shade to keep soil cool. In cold regions, select cold-hardy varieties like ‘January King’ or Savoy types and use frost cloth to protect young transplants from hard freezes. In mild winter climates with consistent cool temperatures, cabbage can be harvested all winter long.