When to Plant Butternut Squash in Zone 9
In USDA zone 9a, start seeds indoors around February 8, transplant or plant outdoors March 15 to June 28, and expect your first harvest around June 28. (9a shown here — see 9a and 9b dates separately below.)
Butternut Squash planting calendar for USDA Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
Start seeds indoors
Feb 8
Transplant outdoors
Mar 15
Projected first harvest
Jun 28
Butternut Squash is ready to harvest in about 105 days, needing roughly 275 frost-free days in zone 9a.
Butternut Squash planting calendar for USDA Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
Start seeds indoors
Jan 25
Transplant outdoors
Mar 1
Projected first harvest
Jun 14
Butternut Squash is ready to harvest in about 105 days, needing roughly 303 frost-free days in zone 9b.
Not sure whether you're in 9a or 9b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
1 variety of butternut squash in the HomeSown library. Tap any for its full grow guide.
Common problems with butternut squash
What to watch for, with identification and treatment for each
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