When to plant cabbage zone 13 — in USDA Zone 13, that question has a different answer from almost anywhere else in the United States. Zone 13 is the hottest USDA zone, frost-free year-round with average winter lows above 60°F, so there is no last frost to wait for and no first frost to beat. Instead you plant by heat and by the wet and dry seasons, and cabbage is a cool-season crop, and in Zone 13 it is a coolest-months-only crop. This guide gives the timing and the honest limits, using published crop ranges — and, as always, check your local extension service for varieties suited to your area.
When to plant cabbage in Zone 13
Cabbage is a cool-season crop, and in Zone 13 it belongs in the coolest months, roughly December through February. It is more forgiving than cauliflower, but it still needs cool weather to head properly — in heat, heads stay loose, split, or bolt. Start seed indoors so transplants are ready at the very start of the cool season, and choose fast-maturing, heat-tolerant varieties, because the 60–90 days to maturity must fit inside the cool window. A late planting that runs into hot weather will disappoint.
Zone 13 covers only the hottest tropical parts of the United States, so these are zone averages, not a promise for any single garden — microclimate, elevation, rainfall and soil all shift the details.
Zone 13 planting data for cabbage
Published ranges from standard horticultural references — germination and maturity vary by variety, soil and weather, so treat them as guides, not guarantees. Zone 13 is frost-free, with average winter lows above 60°F, so no frost dates appear here: there are none to give.
| Detail | Cabbage in Zone 13 |
|---|---|
| Germination | 7–14 days |
| Days to maturity | 60–90 days |
| Spacing | 12–24 inches |
| Soil pH | 6.0–7.0 |
| Sun | full sun |
| Sowing method | both |
| Cold tolerance | frost-tolerant |
| Water needs | moderate |
| Family | Brassicaceae |
For the wider year, see the planting calendar hub and the cool-season month guides such as January in Zone 13.
Starting cabbage in Zone 13
Start cabbage seed indoors — germination takes 7–14 days — and grow seedlings on until sturdy, then transplant into the cool-season bed. Harden seedlings off for a few days, transplant in the late afternoon, and water in well. Space plants 12–24 inches apart, depending on variety — smaller types can go closer, large heading types need the full spacing. Mulch straight away to keep roots cool and moist, and keep the bed weed-free while plants establish.
Soil, spacing and sun for cabbage
Cabbage wants full sun in the cool season and rich, well-drained soil with a pH of 6.0–7.0. Dig in plenty of compost before planting — brassicas are hungry — and keep the soil fertile through the season. Mulch thickly to hold moisture and keep the soil cool, which matters more in Zone 13 than anywhere else. Do not plant cabbage where other brassicas grew last season, to reduce soil-borne disease.
Watering cabbage in Zone 13
Cabbage has moderate water needs, with steady moisture essential for tight heads. Drought makes heads small and tough, and a sudden soaking after a dry spell makes mature heads split. Water at the base in the morning, mulch to even out moisture, and in the dry season water deeply a few times a week. In the wet season, drainage matters more than watering. If a head starts to split, harvest it immediately — it will not heal.
Companion planting for cabbage
Good companions for cabbage include marigolds, basil, onions and lettuce. These pairings come from standard companion-planting references. Keep companions low and open so air can move, and avoid planting cabbage next to other members of the Brassicaceae family in the same season, since they share pests and diseases. For a quick check, try the companion planting finder.
Pests and problems in Zone 13
The common pests for cabbage are cabbage worms, aphids, flea beetles and slugs. In Zone 13, warm, humid weather means pests and diseases are active all year — there is no winter to knock them back — so check plants every few days and act early. A strong jet of water knocks most aphids off, hand-pick larger pests in the morning, and remove badly infested leaves before a small problem becomes a large one. If damage is severe or you cannot identify the culprit, ask your local extension service — and use the pest identifier helper to narrow it down.
Harvest and storage
Cabbage takes 60–90 days to maturity. Heads are ready when they feel firm and solid when squeezed gently — a soft, loose head needs more time, but do not leave it too long in the heat. Cut the head with a knife, leaving a few outer leaves, and the stump may produce small loose leaves afterwards. Harvest in the morning and eat fresh; cabbage keeps better than most brassicas, but in tropical warmth it still does not store for long without refrigeration.
Related reading
- Broccoli in Zone 13 — another crop from this Zone 13 batch, with the same frost-free timing.
- Cabbage in Zone 11 — the same crop in a cooler zone, for comparison.
Frequently asked questions
Can you grow cabbage in Zone 13?
Yes, in the coolest months, roughly December through February. Zone 13 is frost-free with winter lows above 60°F, so cabbage heads stay loose or split once the heat returns. Start indoors, transplant early, and choose fast, heat-tolerant varieties.
Why is my cabbage head splitting?
Uneven watering — a sudden soaking after a dry spell. Keep moisture steady with mulch and regular watering at the base, and harvest a head as soon as it starts to split. Check your local extension service for varieties suited to your area.
How much space does cabbage need?
Space plants 12–24 inches apart, depending on variety. Large heading types need the full spacing; small types can go closer. Crowding in humid air invites disease.
When is cabbage ready to pick?
About 60–90 days after sowing, when the head feels firm and solid when squeezed. Cut with a knife and eat fresh.