Cabbage takes its time. From to harvest can run eleven or twelve weeks, and for most of that time the plant looks like it's doing nothing — a loose rosette of outer leaves that doesn't close into a head until the last few weeks. That slow build is exactly what cabbage needs. Push it with too much nitrogen late in the season, or soak the bed after a dry spell, and the head will split open before you can cut it.
Start seeds indoors about six weeks before your and transplant out around the . The seedlings are cold-tolerant — a light frost won't hurt them — and getting them in early gives you the long the plant prefers. For a fall crop, which is often the more reliable timing, work backward from your first expected fall frost and transplant in mid to late summer. Heads formed in cooling autumn weather tend to be denser and sweeter.
Cabbage needs consistent moisture but not waterlogged soil. The splitting problem — heads cracking open along the top — is almost always caused by a surge of water after the head has formed. A heavy rain following a dry stretch can add enough moisture fast enough to push the cells apart. If splitting is a recurring problem, try twisting the plant a quarter turn after the head firms up; this breaks some of the feeder roots and slows water uptake just enough.
Cabbage worms and cabbage loopers are the main pest threats. Both are caterpillars that blend into the leaves and can strip a young plant or tunnel into a forming head. from transplant through harvest is the most effective deterrent. If you skip cover, check under leaves every few days. Black rot — which enters through leaf margins and turns veins dark — is the most serious disease, and it spreads from infected transplants, contaminated soil, and water splash. Choose resistant varieties and rotate brassicas every three to four years.
Harvest when the head feels firm when you squeeze it. Cut it at the base with a knife, leaving a few wrapper leaves to protect the head. In cool weather, unharvested heads can hold in the garden for several weeks after they're ready. In warm weather, they'll either split or begin to deteriorate quickly — check them daily once they firm up and don't delay. A cabbage left in the garden too long in heat develops a spongy core and off flavors.
Varieties worth knowing
Growth habit — pick before you buy seed
The same crop can grow as a compact bush, a sprawling vine, or something in between. Choose the habit that fits your space and how you want the harvest to arrive — all at once, or a steady trickle.
Forms a dense central head; all types (green, red, savoy) follow the same growth pattern.
Pruning & support: No pruning — harvest the whole head at maturity.
What can go wrong
Companions
How to propagate
Cabbage is grown from seed, started indoors for transplanting in spring or direct sown in summer for a fall crop. It is a straightforward cool-season crop for home gardeners.
Harvest & keep
One-shot harvest for most varieties; some will send small secondary heads after main is cut.
- Refrigerator
- 3–8 weeks (whole head in a bag)
- Freeze
- blanch wedges 90 seconds, freeze in bags — best for cooked use only
- Can
- not recommended as cabbage; pressure can as sauerkraut or kimchi, or water-bath can fermented sauerkraut
- Dry
- not recommended
- Root cellar
- whole heads with outer leaves on keep 3–4 months at 32–40°F, 95% humidity
Ferment into sauerkraut or kimchi for months of storage without canning.
How it grows where you live
Sources
- Cabbage Production in Home Gardens— University of Georgia Extension
- Growing Cabbage— University of New Hampshire Extension
- Cole Crops: Cabbage, Broccoli, Cauliflower, and Brussels Sprouts— Clemson University Home and Garden Information Center
- Black RotV-shaped yellow lesions at brassica leaf margins with blackened veins inside — a bacterial disease that moves through the vascular system.
- Cabbage LooperRagged holes in brassica leaves made by a pale green caterpillar that loops its body as it moves.
- Cabbage MaggotBrassica transplants wilting and dying as white maggots tunnel through roots at or below the soil line.
- Imported CabbagewormRagged holes in brassica leaves with pale green caterpillars and green frass nearby.
- ClubrootBrassica plants wilt and yellow despite watering; roots show club-shaped swellings when dug.
- What causes tip burn on lettuce or brown inner leaves on cabbage and other greens?Tip burn on lettuce and internal browning on cabbage are caused by localized calcium deficiency in the fastest-growing inner tissue — the same mechanism as blossom end rot, but in leafy crops.
- Why do my tomatoes, cabbage heads, or carrots split and crack open?Cracking in fruit and root vegetables is almost always caused by a surge of water after a dry period — the interior of the fruit expands faster than the skin or outer layers can accommodate.