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Sprout Authority

Growing sweet corn in zone 5a

In USDA zone 5a, the typical last spring frost is May 3 and the first fall frost is October 5. Here is when to plant sweet corn against those dates.

Direct sow outdoorsMay 3 to May 17
Expected harvestJuly 2 to August 15About 60 to 90 days from sowing.

These are zone 5a averages

Computed from 2,383 ZIP codes in zone 5a. 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 sweet corn from University of Minnesota Extension. Zone dates are medians; local conditions vary.