Growing pumpkin in zone 4b

In USDA zone 4b, the typical last spring frost is May 8 and the first fall frost is October 1. Here is when to plant pumpkin against those dates.

Direct sow outdoorsMay 8 to May 22

Expected harvestJuly 17 to September 19About 70 to 120 days from sowing.

These are zone 4b averages

Computed from 1,251 ZIP codes in zone 4b. Your town's frost dates vary; enter your ZIP for dates built on your nearest weather station.

Get my exact 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 pumpkin from Clemson Cooperative Extension, Home & Garden Information Center. Zone dates are medians; local conditions vary.