When to Plant Summer Squash in Minnesota
Minnesota spans USDA hardiness 3a to 5a (zones 3a to 5a on this page). Plant summer squash 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
Summer Squash planting calendar for Minnesota, Zone 3a
Average last spring frost
May 30
Average first fall frost
September 10
Start seeds indoors
May 9
Transplant outdoors
Jun 13
Projected first harvest
Aug 2
Most summer squash mature in about 50 days. Full zone 3 guide (both 3a and 3b) →
Summer Squash planting calendar for Minnesota, Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
Start seeds indoors
Apr 29
Transplant outdoors
Jun 3
Projected first harvest
Jul 23
Most summer squash mature in about 50 days. Full zone 3 guide (both 3a and 3b) →
Summer Squash planting calendar for Minnesota, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Start seeds indoors
Apr 24
Transplant outdoors
May 29
Projected first harvest
Jul 18
Most summer squash mature in about 50 days. Full zone 4 guide (both 4a and 4b) →
Summer Squash planting calendar for Minnesota, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Start seeds indoors
Apr 19
Transplant outdoors
May 24
Projected first harvest
Jul 13
Most summer squash mature in about 50 days. Full zone 4 guide (both 4a and 4b) →
Summer Squash planting calendar for Minnesota, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
Start seeds indoors
Apr 14
Transplant outdoors
May 19
Projected first harvest
Jul 8
Most summer squash mature in about 50 days. 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
3 varieties of summer squash in the HomeSown library. Tap any for its full grow guide.
Common problems with summer squash
What to watch for, with identification and treatment for each
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