Corn planting and harvest dates

Corn Planting Dates in Delaware

Usual corn planting and harvest periods in Delaware, shown as ranges with their source. Use them to frame a plan, then adjust for your own frost dates and soil temperature.

Corn dates in Delaware
Activity	Window	Source	Last verified
Planting	Apr 12 to May 28 usual (most active Apr 30 to May 16)	source	2026-11-11
Harvest	Sep 10 to Nov 5 usual (most active Sep 20 to Oct 15)	source	2026-11-11

Corn calendar for Delaware
Item	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Planting				Planting window, most active in April	Planting window, most active in May
Harvest									Harvest window, most active in September	Harvest window, most active in October	Harvest window in November

What these dates mean in Delaware

Planting usually runs about 47 days, from Apr 12 to May 28.

That start date is close to the middle of the 41 places in this data set that report corn planting dates (Apr 14).

Harvest usually runs about 57 days, from Sep 10 to Nov 5.

From the start of the planting window to the start of the harvest window is about 151 days in Delaware, a rough guide to how long the crop occupies the bed or field.

Frost-date caveat: these are published ranges for Delaware. A northern or high-elevation site will run later than a southern or low one, and a cold wet spring can push planting past the window. Frost dates and local conditions vary; NASS state-level usual dates from 20-year progress data (Oct 2010 edition), begin ~5% and end ~95% complete. Check your last spring frost and soil temperature, and confirm with your county extension office.

Related guides

Corn dates in other places

Other crops in Delaware

Last reviewed: November 2026. Source: USDA NASS, Field Crops Usual Planting and Harvesting Dates (October 2010 edition, copy hosted by Cornell University Mann Library). Dates are the usual start and end of the period when about 5% to 95% of the crop is planted or harvested, from long-run state progress data. They are historic averages, not a forecast.