When to plant turnips 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 turnips 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 turnips in Zone 13
Turnips are a cool-season root crop, and in Zone 13 they belong in the coolest months, roughly December through February. They grow fast — 40–60 days to maturity — so a sowing made at the start of the cool season can be harvested before the heat returns. Like beets, the leaves are edible too, which makes them a useful dual-purpose crop. Hot soil makes roots woody and strong-flavoured, so sow early, harvest young, and do not expect a long season.
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 turnips
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 | Turnips in Zone 13 |
|---|---|
| Germination | 7–10 days |
| Days to maturity | 40–60 days |
| Spacing | 4–6 inches |
| Soil pH | 6.0–7.0 |
| Sun | full sun |
| Sowing method | direct sow |
| Cold tolerance | hardy |
| 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 turnips in Zone 13
Sow turnips directly where they will grow — they dislike transplanting — in the coolest months. Germination takes 7–10 days in moist soil, and seedlings grow fast, so thin early to the spacing in the table below and eat the thinnings as greens. Sow in short rows every two or three weeks for a steady supply, keep the seed bed damp until germination, and mulch lightly once seedlings are up to keep the soil cool.
Soil, spacing and sun for turnips
Turnips want full sun in the cool season and loose, well-drained soil with a pH of 6.0–7.0. Dig in compost before sowing, but avoid fresh manure, which makes roots fork. Space plants 4–6 inches apart, with rows wide enough for air to move, and keep the bed weed-free while plants are young. Raised beds help in heavy tropical soils, where clay stops roots from swelling evenly.
Watering turnips in Zone 13
Turnips have moderate water needs, with even moisture the key to mild, tender roots: drought makes them woody and strong-flavoured, while a soaking after a dry spell makes them split. Water deeply and regularly at the base, mulch to slow evaporation, and in the dry season water thoroughly a few times a week. In the wet season, drainage matters more than watering, because waterlogged soil rots roots.
Companion planting for turnips
Good companions for turnips 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 turnips 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 turnips 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
Turnips take 40–60 days to maturity. Pull roots when they are about the size of a tennis ball — young turnips are mild and tender, while oversized ones turn woody in the heat. Loosen the soil with a fork before pulling, trim the tops, and eat the leaves too — they cook like other brassica greens. Eat fresh or store in a cool, damp place; in tropical warmth they do not keep long, so harvest as you need them rather than all at once.
Related reading
- Radishes in Zone 13 — another crop from this Zone 13 batch, with the same frost-free timing.
- Turnips in Zone 11 — the same crop in a cooler zone, for comparison.
Frequently asked questions
Can you grow turnips in Zone 13?
Yes, in the coolest months, roughly December through February. Zone 13 is frost-free with winter lows above 60°F, so hot soil makes roots woody. Turnips take only 40–60 days, so sow early and harvest young.
Why are my turnips woody?
Heat, drought and age are the usual causes. Keep moisture even, mulch, and pull roots young — about tennis-ball size — rather than leaving them to grow large.
Can you eat turnip leaves?
Yes — cook them like other brassica greens. They are one of the best reasons to grow turnips, since the leaves crop even when the roots are modest.
How long do turnips take in Zone 13?
About 40–60 days from sowing. Sow in the coolest months so the growing period falls inside the cool window, and check your local extension service for varieties suited to your area.