Can You Grow Leek in Iowa?
US · USDA Zone 5a · zones 4a, 4b, 5a, 5b
Leeks grow well here — cold-hardy and can be harvested into late autumn.
Plant zones
Iowa last frost
Iowa first frost
Days to harvest
When to plant Leeks in Iowa
Start indoors
Transplant
Harvest
Dates are approximate, based on Iowa'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.
Gardening in Iowa
Iowa has a humid continental climate with cold winters and warm summers. Most of the state is Zone 5a-5b. Excellent for cool-season crops and hardy fruits.
Frequently asked questions
Can you grow Leek in Iowa?
Leeks grow well here — cold-hardy and can be harvested into late autumn.
What zone is Iowa?
Iowa spans USDA Zone 5a (4a, 4b, 5a, 5b).
When do you plant Leeks in Iowa?
Plant Leeks around mid-April (start indoors Jan 20), harvest Jul 24 – Sep 12.