How to Grow Turnip

Turnips are one of the most underrated vegetables in the home garden — fast, productive, cold-hardy, and dual-purpose. Both the root and the leafy tops are edible: the roots have a mild, slightly peppery flavor excellent roasted, mashed, or in soups, while the greens (turnip tops) are a nutritious cooking green with a flavor similar to mustard greens. The entire plant is useful, and its 30–60 day growing time makes it one of the fastest large-root vegetables.

Turnips are a cool-season crop that actually improves in flavor after frost — cold temperatures convert root starches to sugars, producing sweeter, milder roots than those harvested in warm weather. This makes the fall season particularly rewarding for turnip growers. They're also an excellent choice for succession planting and for using the tail ends of the growing season in spring and fall when few other crops perform as well.

Growing Tips

Thin turnip seedlings decisively to 4–6 inches apart — this is the most important step for good root development. Use the thinnings as turnip greens in salads or cooking. Crowded turnips produce small, elongated roots instead of round, full-size ones.
Harvest turnip roots when they reach 2–3 inches in diameter for the best flavor and texture. At this size, the roots are crisp, mildly peppery, and excellent raw or cooked. Larger roots (over 4 inches) often become pithy, tough, and more strongly flavored.
The greens are the surprise star of turnip growing — harvest outer leaves from established plants beginning at 4–6 weeks. The young inner leaves are mild enough for salads; older outer leaves are best cooked quickly like mustard greens (sautéed with garlic or braised with smoked pork). Don't waste the greens.
Leave fall turnips in the ground until needed — they store well in the soil through multiple frosts and repeated freeze-thaw cycles actually improve sweetness. Cover with a thick layer of straw mulch (6–8 inches) to prevent hard freezing in the root zone and extend in-ground storage into December or January in most zones.
Plant turnips as a fall cover crop and soil amendment strategy: sow densely in empty beds in August, harvest roots in fall, then till the remaining greens in as green manure. The greens decompose quickly and add organic matter to beds prepared for the following spring.

Companion Planting

Turnips' fast maturity (35–60 days) makes them ideal for succession planting in beds that open up after summer crops finish — sow in August where beans or cucumbers were growing for a reliable fall harvest. As brassicas, rotate away from cabbage, broccoli, and kale on a 3-year cycle. The planner helps you identify these sequential planting opportunities so beds stay productive through fall.

FAQ

When should I plant turnips?

Direct-sow turnips in early spring 4–6 weeks before your last frost date, or in late summer 6–10 weeks before your first fall frost. The fall window is often more rewarding — natural cooling temperatures and frost exposure sweeten the roots. In mild climates (Zones 7–10), fall and winter are the primary seasons. Turnips are one of the most frost-tolerant root vegetables, surviving temperatures down to 25°F.

Why are my turnips bitter or pithy?

Bitter, pithy turnips result from harvesting too late (roots over 3 inches become dense and strong-flavored), growing in summer heat (warm-season roots are consistently more bitter and pithy), or inconsistent watering (causes internal drying and pithiness). Harvest at 2–3 inches diameter for the best quality. Fall-grown turnips are consistently milder and sweeter than spring or summer roots.

Can I eat turnip greens?

Yes — turnip greens are highly edible and nutritious, rich in vitamins A, C, and K. Young inner leaves are mild enough for salads; mature outer leaves are best cooked. Sauté with olive oil and garlic until wilted (5–7 minutes), or braise with smoked pork and onions in the traditional Southern style. The greens have a pleasant peppery mustard flavor that complements the mild, slightly sweet roots.

How long do turnips last after harvest?

Freshly harvested turnips last 2–4 weeks in the refrigerator in a plastic bag. Roots with greens attached last only 1 week — remove the greens before storage and store separately. For longer storage (2–3 months), store in a root cellar or cool basement at 32–40°F with high humidity. Alternatively, leave roots in the ground through winter with straw mulch protection for fresh harvest on demand.

Are turnips and radishes the same thing?

No — turnips and radishes are both root vegetables in the brassica family, but different genera. Radishes (Raphanus) mature in 25–30 days, are much smaller, and are typically eaten raw. Turnips (Brassica rapa) take 35–60 days, grow 2–6 inches in diameter, have white/purple skin, and are usually cooked (though small young turnips are excellent raw). They have similar flavor profiles (peppery, sweet) but very different sizes, culinary uses, and growing seasons.