When to Plant Butternut Squash in Wyoming
Wyoming spans USDA hardiness 4a to 5b (zones 4a to 5b on this page). Plant butternut squash by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 4a · Zone 4b · Zone 5a · Zone 5b
Butternut Squash planting calendar for Wyoming, 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 11
Butternut Squash is ready to harvest in about 105 days. Full zone 4 guide (both 4a and 4b) →
Butternut Squash planting calendar for Wyoming, 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 6
Butternut Squash is ready to harvest in about 105 days. Full zone 4 guide (both 4a and 4b) →
Butternut Squash planting calendar for Wyoming, 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 1
Butternut Squash is ready to harvest in about 105 days. Full zone 5 guide (both 5a and 5b) →
Butternut Squash planting calendar for Wyoming, Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
Start seeds indoors
Apr 9
Transplant outdoors
May 14
Projected first harvest
Aug 27
Butternut Squash is ready to harvest in about 105 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 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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