How to Grow Cabbage

Updated September 2026 · Garden Advice Guide

Cabbage splits when the plant takes up water fast after a dry spell, so steady moisture matters more than anything else once the heads start forming. A firm head is already full. Hit it with an inch of rain after ten dry days and the inner leaves expand faster than the outer wrapper can stretch, and the head cracks open in a single afternoon. Everything else about growing cabbage is easy by comparison: rich soil, full sun, 15 to 24 inches of space depending on the head size you want, and a floating row cover to keep the caterpillars off.

Get the water even and the timing right and cabbage is one of the most reliable crops in the garden. Let it swing between bone dry and soaked and you will lose heads you already grew.

Not sure when to sow or set out? Get your exact sowing and transplant dates with our free When-to-Plant tool.

Why Cabbage Heads Split, and the Twist That Buys You Time

Splitting is a plumbing problem, not a disease.

A cabbage head is a giant terminal bud. The plant keeps stacking leaves inward, and each new leaf pushes against the wrapper leaves already wrapped around it. While the head is filling, that pressure is normal and the outer leaves stretch to match. Once the head is dense and firm, the outer leaves have stopped growing. They are done.

Now the roots hit a sudden supply of water, either heavy rain or a long soak after a dry stretch. The plant pulls it in, the inner leaves swell with turgor pressure in a matter of hours, and the wrapper leaves have no give left. The head splits from the top down, usually right through the middle.

A split head is still edible if you cut it the same day. It is not a keeper. The crack lets in rain, dirt, and slugs, and rot follows within a few days in warm weather.

How to prevent splitting

1. Keep water steady from the day the head starts to firm. Cabbage wants about 1 to 1.5 inches per week, and the goal is even, not generous. Two moderate waterings beat one flood.
2. Mulch. Three inches of straw or shredded leaves flattens the swing between wet and dry better than any watering schedule. See our mulch guide for depth and material choices.
3. Harvest on time. Most splits happen to heads that were ready a week ago. Cut them.
4. Do not overfeed late. A heavy nitrogen dose once the head is firm pushes fast inner growth and raises the risk.
5. Choose split-resistant varieties for wet climates. Ruby Perfection, Storage No. 4, and most of the dense storage types hold on the plant far longer than early varieties like Golden Acre.
6. Grow in fall where you can. Cool weather slows growth, so fall heads hold for weeks instead of days.

The twist trick

When a head is ready but you cannot harvest it yet, and rain is coming, you can slow the plant's water uptake on purpose.

Grab the head with both hands and twist it about a quarter turn, or roughly 90 degrees. You will feel some of the feeder roots tear. That is the point. The plant keeps enough root to stay alive and healthy, but it can no longer draw water fast enough to blow the head apart.

The gentler version is root pruning. Push a spade straight down into the soil about 6 inches from the stem, on one or two sides, cutting a few roots without lifting the plant.

Either way, buy yourself one to three extra weeks. Do it while the head is firm and before rain, not after. And do not do it to a head that still needs to size up, because you have just cut its supply line.

How to Grow Cabbage in Spring Versus Fall

There are two windows, and they are not equally forgiving.

Spring cabbage is transplanted into cool weather and grows toward heat. That works, but two things go wrong. Warm weather at heading speeds up inner growth, which is exactly when splitting risk peaks. And spring plants meet the first big generation of cabbage worms just as the heads are forming.

Fall cabbage grows into cooling weather. Heads size up slowly, hold on the plant for weeks, and light frost sweetens them, because the plant converts starch to sugar as a natural antifreeze. Established plants take 25 to 28F without damage, and the storage types are usually better tasting after a couple of frosts. Pest pressure also drops off hard after the first cold snap.

If you only grow one crop a year, grow it in fall.

The arithmetic behind the fall column: count back from your average first frost by the variety's days to maturity, then add 14 days, because plants grow measurably slower as daylight shortens through September and October.

Treat those as regional averages. Frost tables come from 30-year station averages spread over wide areas, and your elevation, slope, and distance from water can move your real dates by a week or two. Pull your own numbers from the frost dates tool and confirm your zone with the growing zones lookup.

One spring warning. Cabbage that is transplanted too young and then hit with a sustained stretch below 50F can bolt instead of heading, the same way broccoli buttons. Set out plants that are 4 to 6 weeks old with 4 or 5 true leaves, and protect them with row cover for the first two weeks if a cold snap is likely.

Cabbage Types: Green, Red, Savoy, and Napa

The four groups behave differently in the garden, not just on the plate. Pick by what you actually want to do with it.

A few practical notes on each.

Early green varieties are the split risk. They mature fast, the heads are less dense, and they will not sit in the garden waiting. Plan to eat them within about ten days of firming up.

Storage green varieties are the ones worth planting in volume for fall. A dense 8 pound head from a late variety keeps for 3 to 5 months at 32 to 40F with high humidity, which is why they were the classic root cellar crop.

Red cabbage grows slower than green in most trials and needs the same wide spacing for a smaller head. It also holds better in the garden and resists splitting well. Color comes from anthocyanins, which turn blue in alkaline conditions, so cook with a splash of vinegar or lemon.

Savoy is the most cold hardy of the group and often shrugs off temperatures where green cabbage takes damage. The crinkled leaves also hide caterpillars extremely well, so row cover matters more here.

Napa is a different species, Brassica rapa, and it bolts far more easily than the others. Spring napa is a gamble in most of the country. Sow it in midsummer for a fall crop and it is straightforward.

Spacing Controls Head Size

This is the most useful thing you can know about cabbage, and most seed packets bury it.

Cabbage does not have a fixed head size. Each plant grows outward until it meets a neighbor, then makes the biggest head its leaf area can support. Give it more room, get a bigger head. Crowd it, get a smaller one. Total yield per bed stays roughly similar either way, but the shape of that yield changes completely.

Decide before you plant, because you cannot fix it later. If you want twenty small cabbages you eat one at a time through the fall, plant at 12 inches. If you want six giant heads to turn into kraut in one weekend, plant at 24 inches and give them everything.

A small head is not a failed head. A failed head is a small head on a plant you spaced at 24 inches, which means something else went wrong. Our plant spacing calculator does the plant count for any bed size, and the square foot gardening approach works well for the 12 to 15 inch spacings.

Airflow matters too. Tight spacing keeps the lower leaves damp longer, which raises the odds of downy mildew and gives aphids a sheltered place to build up.

Soil, Feeding, and Water

Cabbage is a heavy feeder and a heavy drinker. Those two facts drive everything.

Soil. Work in 2 to 4 inches of finished compost before planting. Aim for a pH of 6.5 to 7.0, which is slightly higher than most vegetables want, partly because clubroot is far less active above 7.0. Test rather than guess, using our guide on how to test garden soil.

Nitrogen. Cabbage builds its head out of energy stored in the wrapper leaves it makes first, so leaf growth early is the whole game. Side dress with a nitrogen source 3 weeks after transplanting and again 3 weeks after that. Then stop. Late nitrogen pushes soft inner growth and raises the split risk.

Water. About 1 to 1.5 inches per week, and even beats generous. Water at the soil line rather than over the leaves, ideally in the morning. Once heads start to firm, consistency is the priority. Our watering guide has the math for converting inches per week into gallons for your bed.

Mulch. Three inches of straw, shredded leaves, or grass clippings, kept an inch back from the stem. Mulch does three jobs at once here: it buffers soil moisture so heads do not split, it keeps roots cool in a spring crop, and it blocks the soil splash that spreads leaf disease. The mulch guide covers material choices.

Boron and calcium. Hollow stem and brown internal spotting usually trace back to boron shortage, and tip burn on inner leaves traces back to calcium that could not move into the head because water was uneven. Both show up more in dry, fast-grown crops, which is another reason steady water is the fix for most cabbage problems.

Cabbage Pests, in the Order You Should Deal With Them

Four pests cause almost all the damage. Work through the controls in order, and reach for a spray only when the earlier steps have genuinely failed.

Imported cabbage worm. The white butterfly you see fluttering over the bed is laying single yellow eggs on leaf undersides. The velvety green caterpillar that hatches eats holes through the wrapper leaves and then tunnels into the head.

Cabbage looper. Similar damage, but the caterpillar moves in a looping arch and is a paler green with thin white stripes. It comes from a night flying moth.

Cabbage aphids. Gray green, waxy, and they cluster in dense colonies in the growth point and inside the wrapper leaves where sprays cannot reach. They are the hardest of the four to fix once established.

Cabbage root maggot. The worst one, because you do not see it. A small fly lays eggs at the soil line, the larvae eat the roots, and the first symptom is a plant that wilts in the afternoon and never recovers. Most common in cool, wet spring soil.

Controls in order

1. Cultural. Rotate out of the cabbage family for at least 3 years. Clean up crop residue in fall, since loopers and maggots overwinter in it, using our fall garden cleanup checklist. Keep plants growing steadily, because a stressed plant loses more to the same pest load. Time a fall crop so heading happens after the first cold snap thins the butterfly population.
2. Physical, and this is the big one. Floating row cover from the day you transplant, sealed at the soil edge with soil or boards. Cabbage needs no insect pollination, so the cover can stay on all season. That single step blocks cabbage worms, loopers, and root maggot flies at once. Just make sure the bed was not planted with brassicas last year, or you will trap emerging maggot flies under the cover with the crop. For root maggot specifically, a cardboard or felt collar 4 to 6 inches across, laid flat on the soil around the stem, stops egg laying. Hand pick caterpillars from leaf undersides twice a week, and knock aphid colonies off with a hard jet of water.
3. Biological. Let alyssum, dill, cilantro, and yarrow flower near the bed. Parasitic wasps and hoverflies do most of the aphid work if you give them somewhere to feed. Ground beetles eat root maggot eggs, and they need mulch and undisturbed soil to live in. Our companion planting chart has the pairings that hold up. If aphids get away from you, the full playbook is in our guide on how to get rid of aphids.
4. Chemical, last. If caterpillars are still winning after the steps above, the softest option is a biological insecticide class based on Bacillus thuringiensis subspecies kurstaki, which affects caterpillars and little else. Insecticidal soap and horticultural oil classes work on aphids but only where the spray physically contacts the insect, which is why they fail inside a wrapped head. Read the label and follow it exactly, since the label is the law: it defines the legal crop, rate, timing, and pre-harvest interval. Never spray a plant in bloom, including the flowering companions you planted next to the bed, because that is where the pollinators are.

Clubroot, and Why Rotation Is the Only Real Answer

Clubroot is a soil organism, Plasmodiophora brassicae, that infects brassica roots and turns them into swollen, distorted clubs. The plant cannot move water properly, so it wilts in afternoon heat, recovers overnight, then stunts and dies. Pull one up and the roots look like knobby fingers.

There is no cure. There is no spray. Once it is in a bed, it stays.

The reason it matters so much is the resting spores. They survive in soil for 7 to 10 years without a host, and a single infected plant can leave behind billions of them. They move on soil stuck to boots, tools, tires, and transplant root balls, which is how most gardens get it in the first place.

What actually works:

• Rotate on a long cycle. Keep brassicas out of an infected bed for at least 7 years. That is longer than the usual 3 to 4 year rotation, so plan it into the whole garden rather than one bed. Our crop rotation guide has the family groups and a workable sequence.
• Raise pH toward 7.2. Clubroot is much less active in alkaline soil. Adding lime months ahead of planting suppresses it, though it does not eliminate it.
• Improve drainage. The spores swim through water films, so wet soil spreads infection. Raised beds help.
• Buy clean transplants, or grow your own from seed in sterile mix. Bought plants are the single most common entry route.
• Never compost infected roots, and clean soil off tools and boots when you leave the bed.
• Pull out brassica family weeds. Shepherd's purse and wild mustard host the disease quietly.

Clubroot-tolerant varieties exist, notably in the Kilaton and Kilaxy lines, and they are worth using in an infected garden. Tolerance is not immunity, and relying on it without rotation builds up spore levels anyway.

Harvesting Cabbage, and the Second Crop of Small Heads

Cut when the head is firm all the way through. Squeeze the top with your palm: a ready head feels solid, like a basketball, and gives almost nothing. A soft head that dents easily needs more time.

Use a sharp knife and cut through the stem just below the head, keeping two or three of the big outer wrapper leaves attached for protection. Do not pull the plant.

Timing beats size. A dense 3 pound head cut on the right day is worth more than a 5 pound head that split waiting. In warm weather, check firmness every couple of days. Our when to harvest tool gives the maturity windows by crop and planting date.

Getting a second crop

Here is the part most gardeners never try. Leave the stem and root in the ground after cutting the main head, along with those lower leaves.

Within 2 to 4 weeks, small heads sprout from the leaf axils on the remaining stump, usually 4 to 6 of them, each about the size of a tennis ball. They are tender, mild, and perfect for one meal at a time. To improve the odds, cut a shallow X into the top of the cut stem, water it in, and give the stump a light nitrogen feed right after harvest.

This works best on spring cabbage cut in early summer, when there is still season left, and on fall cabbage in mild winter zones. In zone 7 and warmer, a fall cabbage stump can produce sprouts right through winter. Skip it if the plant showed any sign of clubroot or heavy aphid pressure, and pull those stumps out instead.

Storing it

Storage heads keep best unwashed, with the wrapper leaves left on, in a cold and humid spot with a little air movement. Check monthly and pull any head that develops a soft spot, because one rotting head will take its neighbors with it.

Common Cabbage Problems

Worked Example: A Zone 6 Fall Cabbage Crop

Take a garden with an average first fall frost of October 20 and one 4x8 raised bed, which is 32 square feet.

Pick the variety. Storage No. 4, a late green storage type, 85 days from transplant.

Count back. October 20 minus 85 days is July 27. Add 14 days for slower fall growth, and the transplant date moves to July 13.

Count back again for seed. Cabbage takes about 5 weeks from sowing to a transplant-ready seedling, so sow around June 8. Sow into 3 inch pots rather than tiny cells, so the roots never circle and check the plant's growth. Our seed starting guide covers the indoor side.

Choose spacing. This crop is for kraut and winter storage, so 18 inches in row and 24 inches between rows. The 8 foot length holds 5 plants per row, the 4 foot width holds 2 rows, so 10 plants. Expect 4 to 5 pound heads, or roughly 45 pounds from the bed.

Feed. Four inches of compost worked in before planting. Nitrogen side dressing on August 3 and again on August 24. Nothing after that.

Water. 1.25 inches per week over 32 square feet works out to about 25 gallons, split into two deep waterings. Once heads start firming in late September, the schedule stops being flexible. Three inches of straw mulch goes down at the end of July.

Cover. Row cover from transplant day, sealed at the edges, off in mid September once night temperatures drop and butterfly activity ends.

Harvest. Heads firm up around October 10 to October 20. Two light frosts before cutting improve the flavor. If rain is forecast and the heads are already solid, twist each plant a quarter turn on October 8 and cut over the following two weeks.

Second crop. Leave the stumps. In zone 6 they will push small sprout heads until a hard freeze in late November.

Run your own frost date through the when to plant tool and the same arithmetic gives you your dates.

FAQ

Why did my cabbage split open?

The plant took up water quickly after a dry spell, and the inner leaves expanded faster than the outer wrapper leaves could stretch. It almost always happens to a head that was already firm and ready. Keep water even at 1 to 1.5 inches per week, mulch 3 inches deep, harvest as soon as heads feel solid, and twist the plant a quarter turn if rain is coming and you cannot cut yet.

How far apart should cabbage plants be?

It depends on the head size you want, because spacing sets it. Plant at 12 inches for 1 to 2 pound heads, 15 to 18 inches for 2 to 5 pound heads, and 24 inches for 6 to 10 pound storage heads. Total yield per bed is similar either way, so decide before planting whether you want many small heads or a few big ones.

Is cabbage easier to grow in spring or fall?

Fall, in most of the country. Fall cabbage grows into cooling weather, so heads size up slowly and hold in the garden for weeks instead of days, which cuts the split risk sharply. Light frost also sweetens the flavor, and cabbage worm pressure drops off after the first cold snap.

Does cabbage grow back after you cut the head?

The main head does not regrow, but the stump usually pushes 4 to 6 small heads from the leaf axils within 2 to 4 weeks. Leave the roots and lower leaves in place, cut a shallow X in the top of the stem, water it, and give a light nitrogen feed. The sprouts run about tennis ball size and are tender and mild.

How do I keep cabbage worms off my cabbage?

Floating row cover from transplant day, sealed at the soil edge, is by far the most effective single step, and cabbage needs no insect pollination so the cover can stay on all season. Back it with a twice weekly check of leaf undersides for yellow eggs and green caterpillars, and let dill or alyssum flower nearby to bring in parasitic wasps. Only if those fail, consider a biological caterpillar control class, follow the label exactly, and never spray anything in bloom.

What is clubroot and can I fix the soil?

Clubroot is a soil organism that swells brassica roots into distorted clubs, so the plant wilts in heat and stunts. There is no cure and no spray, and the resting spores survive 7 to 10 years without a host. The only real answer is keeping brassicas out of that bed for at least 7 years, raising pH toward 7.2, improving drainage, and never composting infected roots.

How much water does cabbage need?

About 1 to 1.5 inches per week, which is roughly 25 gallons for a 4x8 bed, delivered in two deep waterings rather than daily sips. Evenness matters more than volume, especially once heads begin to firm, since swings between dry and soaked cause both splitting and tip burn. Three inches of mulch does more to steady soil moisture than any watering schedule.

When do I know cabbage is ready to pick?

Squeeze the top of the head with your palm. A ready head feels solid and barely gives, like a basketball, while one that dents needs more time. Cut through the stem just below the head with a sharp knife, keeping two or three wrapper leaves on for protection, and cut early rather than late if heavy rain is in the forecast.

Updated September 2026