🌱 Turnip

How to grow

Turnips are the humble workhorse nobody brags about but everybody should grow. Direct-sow a quarter inch deep in late summer for fall harvest (the classic timing) or very early spring — they germinate fast in cool soil and the roots sweeten after a light frost, when the plant converts starches to sugars as antifreeze. That's not a metaphor; it's literally cryoprotectant biochemistry you can taste.

Here's the two-for-one: the greens are harvestable in 30 days and cook like collards' milder cousin, while the roots keep sizing up below. Harvest greens by taking outer leaves and letting the center keep growing — the root doesn't care. Thin seedlings ruthlessly, because crowded turnips grow into a tangled mat of leaves with roots the size of marbles.

Like all brassicas, turnips want steady moisture and cool weather. Heat makes them woody, strong-flavored, and quick to bolt. In the South, they're a fall-through-winter crop; in the North, spring and fall both work.

Water & feeding

About an inch a week, steady — drought makes roots woody and pungent. Mulch to keep soil cool and moist. A light worm casting top-dress at thinning time feeds both the greens you're cutting and the roots still bulking.

Common problems

• Flea beetles (shotgun holes in leaves): row cover from sowing; damage is cosmetic on fast crops.
• Clubroot (swollen deformed roots, wilting): a soilborne brassica disease — rotate brassicas on a 4+ year cycle, lime if soil is acidic (it thrives below pH 6.0).
• Bolting in heat: sow at the right time; fall crops are more reliable than spring in warm climates.
• Woody/strong roots: harvested too late or grown too hot — pull young (2–3 inches) for sweet, tender roots.

Harvest

Pull roots at 2–3 inches across for the sweetest eating; greens can be cut continuously from 30 days on. Both survive light frosts — and the roots get sweeter after one.