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Place calendarCrop Planting Dates in Iowa
Published planting and harvest windows for 5 crops in Iowa, in one calendar. Ranges only, with sources.
| Crop | Planting | Harvest |
|---|---|---|
| Alfalfa hay | May 24 to Sep 29 | |
| Corn | Planting: Apr 19 to May 26 | Sep 21 to Nov 21 |
| Soybeans | Planting: May 2 to Jun 16 | Sep 21 to Oct 31 |
| Spring oats | Planting: Mar 25 to May 13 | Jul 9 to Aug 11 |
| Winter wheat | Planting: Sep 6 to Oct 30 | Jun 24 to Aug 7 |
Calendar view
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alfalfa hay harvest | Harvest window, most active in May | Harvest window, most active in June | Harvest window, most active in July | Harvest window, most active in August | Harvest window, most active in September | |||||||
| Corn planting | Planting window, most active in April | Planting window, most active in May | ||||||||||
| Corn harvest | Harvest window in September | Harvest window, most active in October | Harvest window, most active in November | |||||||||
| Soybeans planting | Planting window, most active in May | Planting window, most active in June | ||||||||||
| Soybeans harvest | Harvest window, most active in September | Harvest window, most active in October | ||||||||||
| Spring oats planting | Planting window in March | Planting window, most active in April | Planting window, most active in May | |||||||||
| Spring oats harvest | Harvest window, most active in July | Harvest window, most active in August | ||||||||||
| Winter wheat planting | Planting window, most active in September | Planting window, most active in October | ||||||||||
| Winter wheat harvest | Harvest window in June | Harvest window, most active in July | Harvest window in August |
Frost-date caveat: published dates are averages. Find your own last and first frost dates and compare them with these ranges before you plant.
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.