When to Plant Hubbard Squash in Minnesota
Minnesota spans USDA hardiness 3a to 5a (zones 3a to 5a on this page). Plant hubbard 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
Hubbard 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
Hubbard Squash needs about 110 days 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) →
Hubbard 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
Hubbard Squash needs about 110 days to mature — longer than Zone 3b 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) →
Hubbard 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
Sep 16
Hubbard Squash is ready to harvest in about 110 days. Full zone 4 guide (both 4a and 4b) →
Hubbard 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
Sep 11
Hubbard Squash is ready to harvest in about 110 days. Full zone 4 guide (both 4a and 4b) →
Hubbard 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
Sep 6
Hubbard Squash is ready to harvest in about 110 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
1 variety of hubbard squash in the HomeSown library. Tap any for its full grow guide.
Common problems with hubbard squash
What to watch for, with identification and treatment for each
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