Cabbage is one of the most reliable Zone 10 winter crops: it thrives in cool weather, shrugs off the rare light frost, and stores for weeks after harvest. Plant it in autumn and you can be cutting firm, heavy heads from late winter into spring.
Zone 10 at a glance
USDA Zone 10 covers the warmest parts of the United States, including southern Florida, the southern tip of Texas, coastal southern California and Hawaii. Winters are mild, with average winter lows of 30 to 40°F, and the growing season runs nearly all year — frost is rare rather than a regular event.
The average last spring frost in Zone 10 is Jan 15–30 (frost rare), and the average first autumn frost is Dec 15–31 (frost rare). These are zone averages drawn from NOAA frost records, not exact dates for any one garden — always check your local extension service and the forecast before planting tender crops outside. Frost dates vary by microclimate, elevation and year, so treat them as a guide, not a promise. Use our frost date calculator for your zone's averages.
When to plant cabbage in Zone 10
Plant cabbage from October to February, with transplants set out from October to January for the biggest heads. Cabbage is frost-tolerant and grows best in cool weather, so in Zone 10 it is an autumn and winter crop — spring-planted cabbage often bolts or fails to head as temperatures rise. Heads mature 60–90 days after transplanting. Because Zone 10 has a long, nearly year-round growing season, the question is rarely whether cabbage will grow, but whether you plant it in the right season — heat lovers go in after the last frost, cool-season crops go in for autumn and winter.
Cabbage planting at a glance
| Detail | Zone 10 guidance |
|---|---|
| Best planting window | October to February |
| Start indoors | Either — start indoors or sow directly |
| Days to germination | 7–14 |
| Days to maturity | 60–90 |
| Spacing | 12–24 in |
| Soil pH | 6.0–7.0 |
| Sun | full sun |
| Water needs | moderate |
| Cold tolerance | frost-tolerant |
All figures are broad published ranges from standard horticultural references, and they vary by variety, soil and weather. Check your local extension service for advice on your own garden.
Starting cabbage
Start cabbage indoors or sow directly; both work in Zone 10, but transplants give the most reliable heads. Sow seed indoors 4–6 weeks before transplanting, or direct-sow in autumn once the soil has cooled. Seed germinates in 7–14 days. Harden seedlings off before setting them out, and plant them slightly deeper than they stood in the pot. Cover young plants with insect netting to keep cabbage white butterflies from laying eggs on them — in Zone 10 the butterflies are active for much of the year.
Soil, spacing and sun
Cabbage needs full sun and rich, moisture-holding soil with a pH of 6.0–7.0. Work in plenty of compost and a balanced fertiliser before planting; cabbage is a heavy feeder and hungry plants make loose, small heads. Space plants 12–24 inches apart depending on variety — tight spacing suits small early varieties, while big storage types need the full width. Mulch to keep the soil cool and damp, which is especially important in Zone 10's sunny winters.
Watering and feeding
Cabbage has moderate water needs, but even moisture is the key to a good head: a dry spell followed by heavy rain or watering is the classic cause of heads splitting open. Water deeply and regularly so the soil stays evenly damp, and mulch to smooth out the swings. In Zone 10, winter rain may do much of the work in some years, but do not assume — check the soil weekly. Reduce watering slightly as heads firm up, and never water overhead late in the day.
Companion planting
Good companions for cabbage are marigolds, basil, onions and lettuce. Marigolds and onions are said to confuse or repel the cabbage pests, and lettuce fills the gaps between young cabbage plants. Avoid planting cabbage near tomatoes and strawberries, and do not follow it with other brassicas — broccoli, cauliflower, kale or brussels sprouts — in the same bed. A three-year rotation away from brassicas is the standard advice for keeping soil-borne disease down.
Pests and problems
The pests to watch for are cabbage worms, aphids, flea beetles and slugs. Cabbage white caterpillars chew holes in the outer leaves and can burrow into the head, so inspect plants weekly and pick caterpillars off, or keep the bed under insect netting. Aphids cluster on the undersides of leaves and on the growing point; a strong spray of water usually clears them. Flea beetles attack seedlings, and slugs hide under mulch on damp nights. Healthy, well-spaced plants in rich soil resist all of them better than stressed ones.
Harvesting and storing cabbage
Harvest cabbage when the head feels firm and solid when squeezed, 60–90 days after transplanting. Cut the head off at the base with a sharp knife, leaving the outer leaves and the stem in place — many varieties will sprout small secondary heads from the stump. If a head starts to split after rain, harvest it at once rather than leaving it to worsen. Cabbage stores for weeks in a cool place, and wrapped heads keep for a month or more in the fridge. Shredded cabbage also freezes well after blanching.
Frequently asked questions
When do I plant cabbage in Zone 10?
From October to February, with transplants set out October to January. It is a cool-season crop — check your local extension service for the best dates in your area.
Why did my cabbage head split?
Uneven watering — a dry spell followed by heavy rain or watering. Keep the soil evenly moist and mulch well, and harvest any head that starts to split straight away.
Can cabbage survive frost in Zone 10?
Yes. Cabbage is frost-tolerant and Zone 10 frost is rare and light, so frost is rarely a problem. A hard freeze is unlikely, but a light row cover is cheap insurance on a cold night.
How long does cabbage take to grow in Zone 10?
Seed germinates in 7–14 days and heads mature in 60–90 days from transplanting.
For the full year, browse the planting calendar hub. Nearby: november in Zone 10, Cabbage in Zone 9 and Kale in Zone 10. Use the seed spacing calculator and the vegetable yield estimator to plan your own dates.