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Can You Grow Leek in New Hampshire?

US · USDA Zone 5b · zones 4a, 4b, 5a, 5b, 6a

Grows well here

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

Plant zones

3a–9b

New Hampshire last frost

early April

New Hampshire first frost

late October

Days to harvest

100–150 days

When to plant Leeks in New Hampshire

Start indoors

Jan 12

Transplant

Apr 7

Harvest

Jul 16 – Sep 4

Dates are approximate, based on New Hampshire'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 New Hampshire

New Hampshire has a humid continental climate. Coastal areas are Zone 5b-6a; northern mountains are Zone 4a-5a. Short growing seasons but productive for cool-season crops and berries.

See what grows well in New Hampshire →

Frequently asked questions

Can you grow Leek in New Hampshire?

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

What zone is New Hampshire?

New Hampshire spans USDA Zone 5b (4a, 4b, 5a, 5b, 6a).

When do you plant Leeks in New Hampshire?

Plant Leeks around early April (start indoors Jan 12), harvest Jul 16 – Sep 4.