Growing winter squash in zone 4a

In USDA zone 4a, the typical last spring frost is May 12 and the first fall frost is September 28. Here is when to plant winter squash against those dates.

USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service / Oregon State University PRISM Group. NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020. Planting windows for winter squash from Clemson Cooperative Extension, Home & Garden Information Center. Zone dates are medians; local conditions vary.