However, most of the poorly drained, wet soils in Wisconsin and Minnesota are too cold for grain sorghum. The use of a cultipacker or corrugated roller after seeding often gives better stands. Soil temperatures may be too cold for these systems in much of the Upper Midwest. Generally this is 15 to 20 days after corn planting or between May 15 and early June. Grain yields decrease as planting is delayed after early June.
Corn planters are probably the most common seeding equipment.
It is important to place the seed in moist soil to obtain fast emergence of the seedling. A grain drill can also be used to plant the seed in narrow rows. Some adaptations in the grain seedbox may be necessary to isolate the seed above the hole. Some growers have attached small gas funnels above the holes in the seedbox and place the seed in the funnels. Commercial equipment is also available for most newer drills.