🌱 Free USDA zone, frost dates & planting calendar, by ZIP About & data sources
My Planting Zone know your zone

Plant Corn in Zone 4b

Seed-starting, transplant & harvest dates for USDA Zone 4b

Direct sow
May 12
Harvest (~75d)
Jul 26

In Zone 4b, the average last spring frost is around May. Corn is a tender crop, so sow it directly around the dates above.

Last spring frost
May 5
First fall frost
Sep 28
Growing season
146 days

Full Corn grow guide → · All crops for Zone 4b →

Frequently asked questions

When should I start corn in Zone 4b?

Direct sow outdoors around May 12.

Can I direct sow corn in Zone 4b?

Yes, direct sow around May 12.