Growing zucchini 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 zucchini against those dates.

Direct sow outdoorsMay 8 to May 22

Expected harvestJuly 2 to July 16About 55 to 55 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 zucchini from Clemson Cooperative Extension, Home & Garden Information Center. Zone dates are medians; local conditions vary.