Skip to content
Sprout Authority

Growing sweet corn in zone 3a

In USDA zone 3a, the typical last spring frost is May 29 and the first fall frost is September 5. Here is when to plant sweet corn against those dates.

Direct sow outdoorsMay 29 to June 12
Expected harvestJuly 28 to September 10About 60 to 90 days from sowing.

These are zone 3a averages

Computed from 17 ZIP codes in zone 3a. 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.