When to Plant Corn in Minnesota
Minnesota spans USDA hardiness 3a to 5a (zones 3a to 5a on this page). Plant corn by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 3a · Zone 3b · Zone 4a · Zone 4b · Zone 5a
Corn planting calendar for Minnesota, Zone 3a
Average last spring frost
May 30
Average first fall frost
September 10
Direct sow
Jun 13
Corn needs about 75 to 110 days depending on the variety to mature — longer than Zone 3a typically stays frost-free, so it likely won't reliably ripen there outdoors without a head start indoors or season extension. Full zone 3 guide (both 3a and 3b) →
Corn planting calendar for Minnesota, Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
Direct sow
Jun 3
Projected first harvest
Sep 3
Most corn mature in about 75 to 110 days depending on the variety. Full zone 3 guide (both 3a and 3b) →
Corn planting calendar for Minnesota, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Direct sow
May 29
Projected first harvest
Aug 29
Most corn mature in about 75 to 110 days depending on the variety. Full zone 4 guide (both 4a and 4b) →
Corn planting calendar for Minnesota, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Direct sow
May 24
Projected first harvest
Aug 24
Most corn mature in about 75 to 110 days depending on the variety. Full zone 4 guide (both 4a and 4b) →
Corn planting calendar for Minnesota, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
Direct sow
May 19
Projected first harvest
Aug 19
Most corn mature in about 75 to 110 days depending on the variety. Full zone 5 guide (both 5a and 5b) →
Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
4 varieties of corn in the HomeSown library. Tap any for its full grow guide.
Common problems with corn
What to watch for, with identification and treatment for each
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