When to Plant Squash in Wisconsin

Growing Squash in Wisconsin: Complete Guide

Squash (Cucurbita moschata) is a crop that grows best when sown directly in the garden. Depending on your zone, the right time to direct sow in Wisconsin falls between March 9, 2027 (Zone 6a) and April 8, 2027 (Zone 3b), once soil temperatures are consistently warm enough for germination.

Because Wisconsin stretches across 6 USDA hardiness zones (3b, 4a, 4b, 5a, 5b, 6a), planting windows can shift by as much as six to eight weeks from one end of the state to the other. Gardeners in the warmer southern zones can start earlier, while those in cooler northern zones should wait until the zone table above shows their last frost has passed.

With 90 days to maturity, Squash fits comfortably within Wisconsin's growing season in most zones. In the warmest parts of the state, a second planting later in the season may be possible.

Squash requires full sun (6-8 hours) and regular (1 inch/week) moisture. Midwest growing seasons are compressed between late spring frosts and fall cold snaps, so timing transplants precisely pays off.

For the most precise planting dates tailored to your exact location, enter your ZIP code on our planting calendar or use the zone table above to find the schedule for your area of Wisconsin.