Turnips are an underrated winter crop in Zone 9: quick to grow, happy in cool weather, and useful twice over, with sweet roots and edible greens from the same planting.
Zone 9 at a glance
USDA Zone 9 covers the warmest parts of the southern United States, including much of Florida, southern Texas, southern Louisiana, southern Arizona and coastal California. Winters are mild, with average winter lows of 20 to 30°F, and the growing season runs nearly all year.
The average last spring frost in Zone 9 is Jan 30–Feb 15, and the average first autumn frost is Dec 1–15. 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. The average last spring frost in Zone 9 is Jan 30–Feb 15, and the average first autumn frost is Dec 1–15. These are USDA 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. Use our frost date calculator for your zone's averages.
When to plant turnips in Zone 9
Direct-sow in autumn (September to November) for winter roots; a late-winter sowing (January to February) also works. The average last spring frost in Zone 9 is Jan 30–Feb 15, and the average first autumn frost is Dec 1–15. Because Zone 9 has a long, nearly year-round growing season, the question is rarely whether turnips will grow, but whether you plant it in the right season for the crop — heat lovers go in after the last frost, cool-season crops go in for autumn and winter.
Turnips planting at a glance
| Detail | Zone 9 guidance |
|---|---|
| Best planting window | Direct-sow in autumn (September to November) for winter roots; a late-winter sowing (January to February) also works. |
| Start indoors | Not needed — direct sow |
| Direct sow / transplant | Direct-sow outdoors September–November and January–February |
| Days to germination | 7–10 |
| Days to maturity | 40–60 |
| Spacing | 4–6 in |
| Soil pH | 6.0–7.0 |
| Sun | full sun |
| Water needs | moderate |
| Cold tolerance | hardy |
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 turnips
Turnip seed germinates in 7–10 days, and it is always direct-sown. Sow seed about half an inch deep in prepared beds and thin seedlings to the final spacing once they have a few true leaves — crowded turnips stay small. Thinnings are good eating as greens. In Zone 9, autumn sowing is the main crop: roots size up through the cool winter months and taste sweetest after a light frost. Spring sowings must mature before summer heat, which makes roots woody and strong-flavoured.
Soil, spacing and sun
Turnips need full sun and fertile, well-drained soil with a pH of 6.0–7.0. Work compost into the bed and remove stones, which cause forked roots. Space plants 4–6 inches apart in rows. Turnips are related to other brassicas, so do not plant them where cabbage, broccoli or kale grew last year. A light mulch keeps the soil moist and suppresses weeds while roots are sizing up.
Watering and feeding
Turnips have moderate water needs, but steady moisture matters: drought gives small, woody, strong-flavoured roots, and uneven watering can split them. Water deeply once or twice a week, keeping the soil evenly moist while roots are swelling, and mulch to smooth out moisture swings. In Zone 9's dry autumn spells, check the bed weekly. Turnips are fairly tolerant once established, but regular water is what makes roots sweet and tender.
Companion planting
Good companions for turnips are marigolds, basil, onions and lettuce. Onions are a classic partner for turnips, and lettuce fills the gaps between young plants. Avoid planting turnips where other brassicas grew recently — they share pests such as flea beetles and clubroot. Rotate brassicas to a fresh bed each year. Turnips also grow well near peas, which fix nitrogen that turnips use.
Pests and problems
The pests to watch for are cabbage worms, aphids, flea beetles and slugs. Flea beetles pepper young leaves with holes; healthy plants usually outgrow the damage, and fine mesh keeps beetles off. Cabbage worms chew leaves — check undersides for eggs and hand-pick caterpillars. Slugs are active in wet winter weather. In Zone 9, the main risk is bolting in warm weather, so sow in the cool months and harvest on time.
Harvesting and storing turnips
Harvest turnips 40–60 days from sowing, when roots are about the size of a golf ball to a tennis ball — smaller roots are sweeter and more tender. Lift them with a fork, trim the tops, and use the greens too: turnip greens are a classic southern vegetable, best cooked. Roots keep for weeks in the fridge, or store in damp sand in a cool place. In Zone 9, autumn-sown turnips are the sweetest, thanks to the cool winter and light frosts.
Frequently asked questions
When should I plant turnips in Zone 9?
Direct-sow in autumn, September to November, for winter roots, with a second sowing in late winter. Turnips are a cool-season crop — check your local extension service for the best dates in your area.
Can I eat turnip greens?
Yes — turnip greens are edible and a classic southern vegetable. Harvest outer leaves while roots are growing, but do not strip the plant bare or the roots will stay small.
Why are my turnips woody?
Heat and drought. Turnips sown in warm weather or left too long in dry soil turn woody and strong-flavoured. Sow in the cool months, water steadily, and harvest young.
How long do turnips take to grow in Zone 9?
Seed germinates in 7–10 days and roots mature in 40–60 days, so autumn-sown turnips are typically ready in winter.
For the full year, browse the planting calendar hub. Nearby: october in Zone 9, Turnips in Zone 7 and Parsnips in Zone 9. Use the seed spacing calculator and the vegetable yield estimator to plan your own dates.