Turnip

Turnips are underrated largely because most people have eaten them at the wrong time — dug from a summer garden when they're large, pithy, and sharp, or served from storage without any of the sweetness that cool temperatures bring out. A turnip pulled from the ground in early October, when nights are dropping into the low 40s, is a different vegetable entirely: mild, almost nutty, with a texture that holds up in a braise without turning to mush.

Sow directly 4 weeks before your last frost date for a spring crop, or in late summer for a fall harvest — the timing depends on counting back from your expected first fall frost, not your last spring frost. The fall sowing tends to produce better roots. Give turnips 40 to 60 days of growing time that ends in cool weather, not warm, and they'll deliver their best. In spring, that window can be tight: a warm May can turn a promising bed of turnip seedlings into a bolting, bitter disappointment within two weeks.

Thinning is the step most gardeners underestimate. Turnip seeds are small and easy to sow too thickly; the resulting crowded seedlings produce tops at the expense of roots. Thin to 4-inch spacing when seedlings are 2 to 3 inches tall. If you're growing primarily for greens — Seven Top is the classic greens-only variety — spacing can be tighter, around 2 inches, and you can harvest leaves from the plants repeatedly without pulling the whole plant.

The most common root failure is pithy, hollow texture at harvest. This usually traces back to one of two things: harvesting too late, when roots have grown past 3 inches in diameter and the flesh has become coarse, or irregular watering that causes periods of stress followed by rapid growth. Keep soil consistently moist and harvest small-to-medium roots at 2 to 3 inches — purple tops and Hakurei types are best at that size. Japanese salad turnips like Hakurei can be eaten raw at 2 inches and have a mild, sweet flavor that most gardeners associate with radishes rather than turnips.

Turnip greens are a crop in their own right. The young leaves, harvested when 4 to 6 inches tall, are peppery and rich; older leaves become tougher and more pungent but still cook well in greens. If you grow Seven Top specifically for its greens, cut leaves to within a few inches of the base and they'll regrow for multiple harvests. Roots from Seven Top are small and fibrous — they're not the point. For a dual-purpose crop, Purple Top White Globe gives you both substantial roots and serviceable greens.