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Can You Grow Leek in Wisconsin?

US · USDA Zone 5a · zones 3b, 4a, 4b, 5a, 5b

Grows well here

Leeks grow well here — cold-hardy and can be harvested into late autumn.

Plant zones

3a–9b

Wisconsin last frost

mid-April

Wisconsin first frost

mid-October

Days to harvest

100–150 days

When to plant Leeks in Wisconsin

Start indoors

Jan 20

Transplant

Apr 15

Harvest

Jul 24 – Sep 12

Dates are approximate, based on Wisconsin's average frost dates. Your exact yard may vary by microclimate.

About Leek

Leeks are cold-hardy slow-growing vegetables that can be harvested well into autumn and even winter.

Start indoors in late winter — leeks need a very long season. Transplant deeply to blanch stems. Harvest after first frosts — cold improves flavour. Very cold-hardy surviving to -10°C.

Full leek growing guide →

Gardening in Wisconsin

Wisconsin has a cold humid continental climate. Milwaukee is Zone 5b-6a; northern Wisconsin is Zone 4a-5a. Cold winters but warm productive summers. Known for dairy farming and cold-hardy crops.

See what grows well in Wisconsin →

Frequently asked questions

Can you grow Leek in Wisconsin?

Leeks grow well here — cold-hardy and can be harvested into late autumn.

What zone is Wisconsin?

Wisconsin spans USDA Zone 5a (3b, 4a, 4b, 5a, 5b).

When do you plant Leeks in Wisconsin?

Plant Leeks around mid-April (start indoors Jan 20), harvest Jul 24 – Sep 12.