Crop dates by place

Sweet corn Planting Dates by State and Region

Published sweet corn planting windows for 7 places, with the source and the caveats you need before you use them.

Across the 3 places in this data set, the planting window begins as early as Apr 1 (Columbia and Snake River valleys, Oregon) and as late as May 1 (Oregon Coast). The middle of the range starts around May 1.

Sweet corn windows by place
Place	Planting	Harvest
Central Missouri	Planting: planting dates 4/25 to 8/1 (month/day)
Central and higher-elevation Eastern Oregon	Planting: Late May (direct seed)
Columbia and Snake River valleys, Oregon	Planting: April
Minnesota	Planting: mid may to mid june
North Missouri	Planting: planting dates 5/1 to 7/20 (month/day)
Oregon Coast	Planting: May
South Missouri	Planting: planting dates 4/15 to 8/15 (month/day)

Calendar view

Sweet corn calendar by place
Item	Jan	Apr	May
Central Missouri planting	Timing in table above
Central and higher-elevation Eastern Oregon planting			Planting window in May
Columbia and Snake River valleys, Oregon planting		Planting window in April
Minnesota planting	Timing in table above
North Missouri planting	Timing in table above
Oregon Coast planting			Planting window in May
South Missouri planting	Timing in table above

Frost-date caveat: ranges blur real differences inside a state or region. Use them to plan, then fit them to your last frost date, soil temperature and field conditions.

Last reviewed: November 2026. Source: MU Extension G6201 Vegetable Planting Calendar, Table 2.