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Can You Grow Peanut in Illinois?

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

Won't grow here

Peanuts need 120-150 warm frost-free days to mature — too short or too cool a season means no nuts.

Plant zones

6a–11b

Illinois last frost

early April

Illinois first frost

late October

Days to harvest

120–150 days

When to plant Peanuts in Illinois

Start indoors

Mar 10

Transplant

Apr 7

Harvest

Aug 5 – Sep 4

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

About Peanut

Peanuts are a fascinating crop — not a tree nut but a legume that flowers above ground and buries its pods below. They need a long, hot growing season and loose, sandy soil.

Plant raw, unroasted peanuts after soil warms to 65°F+. Hill soil around plants as they grow so pegs can bury. Harvest when foliage yellows; dry the pods before shelling.

Full peanut growing guide →

Gardening in Illinois

Illinois has a humid continental climate with hot summers and cold winters. Chicago is Zone 5b-6a; southern Illinois is warmer at Zone 6-7. Classic Midwest growing region.