When to Plant Hubbard Squash in Zone 3
In USDA zone 3a, start seeds indoors around May 9, transplant or plant outdoors June 13 to September 10. (3a shown here — see 3a and 3b dates separately below.)
Hubbard Squash planting calendar for USDA 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 3atypically stays frost-free, so it likely won't reliably ripen there outdoors without a head start indoors or season extension.
Hubbard Squash planting calendar for USDA 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 3btypically stays frost-free, so it likely won't reliably ripen there outdoors without a head start indoors or season extension.
Not sure whether you're in 3a or 3b? 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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