Corn Planting Date Considerations

For many growers, this unusually early spring may offer the earliest opportunity of all time for corn planting. This makes it especially important to weigh the risks and benefits of early planting.

Crop Insurance

For farmers with Federal crop insurance, planting before the earliest allowable planting dates specified by the USDARisk Management Agency will result in loss of replant coverage, even if the need for replanting is due to factors other than freeze damage or poor emergence. The earliest allowable planting date is April 11 for most counties in Minnesota and April 21 for some northern counties (Beltrami, Carlton, Itasca, Kittson, Koochiching, Lake of the Woods, Marshall, Roseau and St. Louis counties). The earliest allowable planting dates for each county and crop can be found on the Risk Management Agency'swebsite.

Yield

Rarely in Minnesota are soils fit for corn planting prior to the earliest date established for crop insurance. Corn planting date studies from 1988 to 2003 at Lamberton, MN, show that planting dates ranging from April 21 to May 6 produced yields within 1% of the maximum. These results are supported by a recent study from 2009 to 2011 at Lamberton, Morris and Waseca, MN that was funded by the Minnesota Corn Growers Association, in which yield was optimized on average with planting dates of April 25 to May 10. In the 10 instances when planting occurred prior to April 18 in these studies, yields were 82-100% of the maximum (average = 94%). In both studies, rapid decline in corn yield did not occur until planting was delayed beyond mid-May.  

Frost Damage