Zone 8 gives cabbage a long season, but only if the planting date respects the frost calendar. Average winter lows are 10 to 20°F, the last spring frost averages Mar 1–15, and the first autumn frost averages Nov 15–Dec 1 — a long frost-free stretch in an average year. All of these are USDA/NOAA averages, not exact dates for a particular garden, so use your local extension service to confirm the dates for your own spot.
Zone 8 at a glance
In Zone 8, winter lows average 10 to 20°F and the growing season runs from the last frost (Mar 1–15) to the first frost (Nov 15–Dec 1). Cabbage needs 60–90 days to maturity and is frost-tolerant. The planting calendar hub gives the full Zone 8 picture, and the frost date calculator can work from your own local averages.
| Detail | Zone 8 guidance |
|---|---|
| Average last spring frost | Mar 1–15 (average/range) |
| Average first autumn frost | Nov 15–Dec 1 (average/range) |
| Winter low | 10 to 20°F |
| Days to germination | 7–14 days |
| Days to maturity | 60–90 days |
| Sowing | Start indoors Jan–Feb (spring) or Jul (autumn) |
| Transplanting | Feb–Mar (spring) or Aug–Sep (autumn) |
| Harvest | 60–90 days after sowing; spring harvest Apr–Jun, autumn Oct–Nov |
| Sun | full sun |
| Soil pH | 6.0–7.0 |
| Spacing | 12–24 inches |
| Water needs | moderate |
When to plant cabbage in Zone 8
Cabbage is a sturdy cool-season crop that does well in Zone 8 in both spring and autumn. Start seed indoors in January to February and transplant out from February into March for a spring crop, or start seed in July and transplant in August to September for heads that mature in the cool of autumn, before the first frost (Nov 15–Dec 1). Cabbage tolerates light frost, so spring transplants can go out before the average last frost (Mar 1–15) has fully passed. With 60–90 days to maturity, the autumn crop is often the better one in Zone 8 — heads form as the weather cools, and light frost sweetens the flavour. The Seed Starting Calculator turns your frost averages into sowing dates — see also Zone 8 February for what else is happening in the garden that month.
Starting cabbage in Zone 8
Start seed indoors, with germination in 7–14 days, and grow seedlings on in bright light. Harden them off for a week before transplanting, and set them out at their final spacing, firming the soil well around each plant. Water transplants in thoroughly and mulch to hold moisture. A collar around the stem base protects young plants from cutworms. Cabbage is a hungry crop, so work compost into the bed before planting and feed again as heads begin to form.
Soil, spacing, sun and water
Site matters as much as timing. Choose the sunniest spot you have — full sun — and check the soil pH is in the 6.0–7.0 range. Space plants 12–24 inches apart so each plant gets its share of light and air. Cabbage needs moderate water: keep the soil evenly moist, water deeply at the base in the morning so leaves dry before night. Mulch after planting to hold moisture and keep soil off the leaves. Cabbage likes rich, firm, moisture-retentive soil with a pH of 6.0–7.0. Loose soil lets plants rock in the wind and form poor heads, so firm transplants in well. Steady water matters: irregular watering after a dry spell is the main cause of heads splitting.
Companion planting
Companion planting for cabbage is simple: marigolds, basil, onions, lettuce are all good neighbours. Planting cabbage near marigolds — see Zone 8 Kale — can help you plan a bed that uses the season well. Cabbage grows well with marigolds, basil, onions and lettuce, and aromatic herbs are traditionally planted nearby to confuse cabbage pests. Rotate brassicas to a fresh bed each year, and keep cabbage away from tomatoes, which share some soil problems. What matters most is rotation — do not grow cabbage or its Brassicaceae relatives in the same bed year after year.
Pests and problems
Cabbage is not trouble-free, and the usual suspects are cabbage worms, aphids, flea beetles, slugs. Cabbage worms are the main pest — green caterpillars that chew holes in leaves and burrow into heads. Inspect leaf undersides weekly, hand-pick caterpillars, and cover plants with fine insect mesh. Aphids, flea beetles and slugs also attack, especially young transplants. Remove badly affected outer leaves early. Healthy, well-spaced plants in good soil resist pests better than stressed ones, so spacing, watering and rotation are your first line of defence. Inspect leaves weekly, hand-pick larger pests and wash small ones off with water.
Harvest and storage
Cut heads when they feel firm and solid, before they split — typically 60–90 days after sowing. Cut with a knife, leaving a few outer leaves, and use promptly or store in a cool place: firm heads keep for weeks in cool storage. If a head splits after heavy rain, use it at once rather than storing it. Some plants produce small secondary heads from the stump after the main head is cut, so leave the stump in place for a while. The Zone 7 Cabbage page shows how the same crop behaves in a shorter season.
Frequently asked questions
When should I plant cabbage in Zone 8?
Start seed indoors in January to February and transplant out from February into March for spring, or start in July and transplant in August to September for autumn. Cabbage is frost-tolerant and needs 60–90 days to maturity — check your local extension service for your own dates.
Why did my cabbage heads split?
Usually irregular watering — a heavy rain or watering after a dry spell makes heads swell and split. Keep soil evenly moist with mulch and steady watering, and harvest firm heads promptly.
How far apart should I space cabbage in Zone 8?
Space plants 12–24 inches apart, in full sun and soil with a pH of 6.0–7.0. Firm the soil around transplants so plants do not rock in the wind, and mulch to hold moisture.
Does frost improve cabbage flavour?
Yes — light frost sweetens cabbage, which is one reason the autumn crop is often the best in Zone 8. Heads tolerate light frost well, but harvest before hard freezes.
What pests affect cabbage in Zone 8?
The most common are cabbage worms, aphids, flea beetles and slugs. Inspect leaf undersides weekly, hand-pick caterpillars, and cover young plants with fine insect mesh.