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Winter vegetables: what to grow for cold-season harvests

A vegetable garden does not have to stand empty in winter. Hardy crops such as kale, leeks and winter cabbage can stay in the ground through frost and be picked when little else is growing. The secret is sowing early enough, so plants are well grown before days get short.

Winter vegetables: what to grow for cold-season harvests
Photo: Rasbak, CC BY-SA 3.0 · Wikimedia Commons
Hardiest crops
Kale, leeks, Brussels sprouts, parsnips
Main sowing time
Late spring to early summer
Frost tolerance
Kale leaves to about 20 °F
Key tool
Fleece, cloches or a cold frame

Why timing matters most

In winter, light is too weak for much new growth. Winter crops are mostly grown in late summer and fall and simply held in the cold until you pick them. A kale plant sown too late stays small all winter; one sown in early summer can be picked for months.

  • Work back from your first frost date.
  • Most winter brassicas are sown in late spring to early summer and planted out in summer.
  • Fast salads and spinach can be sown until early fall.

The most reliable winter crops

Leaves and stems

  • Kale: very hardy; frost can make leaves sweeter.
  • Leeks: stand in the ground and are lifted as needed.
  • Winter cabbage and Brussels sprouts: long-season, very cold-tolerant.
  • Swiss chard and spinach: keep producing in mild spells.

Roots and bulbs

  • Parsnips and carrots: can stay in the soil under a mulch.
  • Winter radish and turnips: quick to grow in late summer.
  • Garlic and overwintering onions: planted in fall for summer harvest.
Leeks can stand in the ground all winter.
Leeks can stand in the ground all winter. Photo: Amada44, CC BY-SA 4.0 · Wikimedia Commons

A simple sowing plan

  1. Late spring: Sow Brussels sprouts, winter cabbage and leeks in modules or a seedbed.
  2. Early summer: Sow kale and purple sprouting broccoli; plant out leeks.
  3. Midsummer: Plant out brassicas firmly, 18–24 in apart (estimated), and net them against birds and caterpillars.
  4. Late summer: Sow spinach, chard, winter lettuce, turnips and winter radish.
  5. Early fall: Sow hardy salad leaves for a cold frame; plant garlic and onion sets.
  6. Late fall: Mulch roots, cover tender salads and stake tall brassicas.

Protecting crops from frost

  • Fleece: Heavier grades of horticultural fleece give about 4 °F of frost protection; double it in hard frosts.
  • Cloches and tunnels: Keep rain and wind off salads and spinach, so leaves stay clean and growing.
  • Cold frames: Ideal for winter lettuce and hardy salad leaves; open them on mild sunny days.
  • Mulch: A 6–8 in layer of straw or leaves over carrots and parsnips stops the soil freezing hard.
Winter cabbage stands up well to frost.
Winter cabbage stands up well to frost. Photo: George Chernilevsky, Public domain · Wikimedia Commons

Winter vegetables in pots

Good choices

  • Kale and chard in a deep pot.
  • Winter salads and spinach in troughs.
  • Garlic in a pot at least 8 in deep (estimated).

Care tips

  • Raise pots on feet so they drain.
  • Group pots against a sheltered wall.
  • Water only when the mix is dry; never on frozen soil.

Harvesting in winter

Pick kale and chard leaves from the bottom, a few at a time, so the plant keeps going. Lift leeks and parsnips when the ground is not frozen. Harvest Brussels sprouts from the bottom of the stem upward. Avoid handling frozen leaves; wait until they thaw.

Winter pests and weather

  • Net brassicas: pigeons strip leaves in hard weather.
  • Check for slugs under covers on mild nights.
  • Remove yellow and rotting leaves to prevent mold.
  • Stake tall Brussels sprouts against wind rock.

⚠️ Heavy, wet soil causes more winter losses than cold. Raised beds or well-drained ground make a big difference.

Common problems and fixes

Plants stay small all winterThey were sown too late. Next year sow 4–6 weeks earlier (estimated).
Blown, loose Brussels sproutsOften loose soil or wind rock. Firm the soil well when planting and stake plants.
Salad leaves rot under coverToo damp and still. Ventilate on mild days and water sparingly.

Frequently asked questions

Can I start a winter garden in late fall?

Only with garlic, onion sets and some hardy salads under cover. Most winter crops must be sown in summer.

Does frost ruin kale?

No. Kale is very hardy and frost often improves its flavor.

Do I need a greenhouse?

No. Fleece, cloches and a cold frame are enough for most winter crops.

Should I water in winter?

Rarely outdoors. Pots and covered crops may need a little water in dry spells, ideally in the morning.

Vegetables for the cold season

KaleLeekCabbageSpinachGarlicBroccoliSwiss chardCarrot

Sources

Last updated: 2 November 2026