When to plant Sweet corn

The planting dates depend on your average frost dates. Enter a ZIP code to get yours, or read the USDA table below.

Earliest safe spring planting dates: sweet corn
Average last freezePlant
Jan 30Feb 1 – Mar 15
Feb 8Feb 10 – Apr 1
Feb 18Feb 20 – Apr 15
Feb 28Mar 1 – Apr 15
Mar 10Mar 10 – Apr 15
Mar 20Mar 15 – May 1
Mar 30Mar 25 – May 15
Apr 10Apr 10 – June 1
Apr 20Apr 25 – June 15
Apr 30May 10 – June 15
May 10May 10 – June 1
May 20May 15 – June 1
May 30May 20 – June 1
June 10Not listed
Latest safe fall planting dates: sweet corn
Average first freezePlant by
Aug 30Not listed
Sept 10Not listed
Sept 20June 1 – July 1
Sept 30June 1 – July 1
Oct 10June 1 – July 10
Oct 20June 1 – July 20
Oct 30June 1 – Aug 1
Nov 10June 1 – Aug 15
Nov 20June 1 – Sept 1
Nov 30Not listed
Dec 10Not listed
Dec 20Not listed

Source: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. The bulletin scan.

Sweet Corn by state