When to Plant Tromboncino Squash in Wisconsin
Wisconsin spans USDA hardiness 4a to 6a (zones 4a to 6a on this page). Plant tromboncino 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 · Zone 6a
Tromboncino Squash planting calendar for Wisconsin, 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
Jul 23
Tromboncino Squash is ready to harvest in about 55 days. Full zone 4 guide (both 4a and 4b) →
Tromboncino Squash planting calendar for Wisconsin, 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
Jul 18
Tromboncino Squash is ready to harvest in about 55 days. Full zone 4 guide (both 4a and 4b) →
Tromboncino Squash planting calendar for Wisconsin, 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
Jul 13
Tromboncino Squash is ready to harvest in about 55 days. Full zone 5 guide (both 5a and 5b) →
Tromboncino Squash planting calendar for Wisconsin, 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
Jul 8
Tromboncino Squash is ready to harvest in about 55 days. Full zone 5 guide (both 5a and 5b) →
Tromboncino Squash planting calendar for Wisconsin, 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
Jul 3
Tromboncino Squash is ready to harvest in about 55 days. Full zone 6 guide (both 6a and 6b) →
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 tromboncino squash in the HomeSown library. Tap any for its full grow guide.
🌱 Grow tromboncino 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 →