When to Plant Kabocha Squash in Utah
Utah spans USDA hardiness 4a to 8b (zones 4a to 8b on this page). Plant kabocha 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 5a · Zone 5b · Zone 6a · Zone 6b · Zone 7a · Zone 7b · Zone 8a · Zone 8b
Kabocha Squash planting calendar for Utah, 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 1
Kabocha Squash is ready to harvest in about 95 days. Full zone 4 guide (both 4a and 4b) →
Kabocha Squash planting calendar for Utah, 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
Aug 22
Kabocha Squash is ready to harvest in about 95 days. Full zone 5 guide (both 5a and 5b) →
Kabocha Squash planting calendar for Utah, 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 17
Kabocha Squash is ready to harvest in about 95 days. Full zone 5 guide (both 5a and 5b) →
Kabocha Squash planting calendar for Utah, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Start seeds indoors
Apr 4
Transplant outdoors
May 9
Projected first harvest
Aug 12
Kabocha Squash is ready to harvest in about 95 days. Full zone 6 guide (both 6a and 6b) →
Kabocha Squash planting calendar for Utah, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Start seeds indoors
Mar 30
Transplant outdoors
May 4
Projected first harvest
Aug 7
Kabocha Squash is ready to harvest in about 95 days. Full zone 6 guide (both 6a and 6b) →
Kabocha Squash planting calendar for Utah, Zone 7a
Average last spring frost
April 15
Average first fall frost
October 20
Start seeds indoors
Mar 25
Transplant outdoors
Apr 29
Projected first harvest
Aug 2
Kabocha Squash is ready to harvest in about 95 days. Full zone 7 guide (both 7a and 7b) →
Kabocha Squash planting calendar for Utah, Zone 7b
Average last spring frost
April 10
Average first fall frost
October 30
Start seeds indoors
Mar 20
Transplant outdoors
Apr 24
Projected first harvest
Jul 28
Kabocha Squash is ready to harvest in about 95 days. Full zone 7 guide (both 7a and 7b) →
Kabocha Squash planting calendar for Utah, Zone 8a
Average last spring frost
April 1
Average first fall frost
November 10
Start seeds indoors
Mar 11
Transplant outdoors
Apr 15
Projected first harvest
Jul 19
Kabocha Squash is ready to harvest in about 95 days. Full zone 8 guide (both 8a and 8b) →
Kabocha Squash planting calendar for Utah, Zone 8b
Average last spring frost
March 20
Average first fall frost
November 20
Start seeds indoors
Feb 27
Transplant outdoors
Apr 3
Projected first harvest
Jul 7
Kabocha Squash is ready to harvest in about 95 days. Full zone 8 guide (both 8a and 8b) →
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 kabocha squash in the HomeSown library. Tap any for its full grow guide.
Common problems with kabocha squash
What to watch for, with identification and treatment for each
🌱 Grow kabocha squash with a calendar built for your exact yard
HomeSown turns your ZIP code into a personalized planting calendar, watering reminders, and pest help. Free to start.
Start your free garden →