Hybrids tend to be coarser than sudangrass and vary in seed color and size, yield and growth characteristics depending on their parents. Like sudangrass, sorghum-sudangrass hybrids will regrow after each harvest unless environmental conditions are restrictive. Millet has smaller stems and is more leafy than the sorghum, sudangrass, or sorghum-sudangrass hybrids. Pearl millet will regrow after harvest but not as rapidly as either the sudangrass or sorghum- sudangrass hybrids. German or Foxtail millet, however, does not regrow after harvest.
Millet yields are usually lower than sorghum-sudangrass hybrids.
Soil temperatures should be at least 60 degrees F. Seedings may be made as late as July 15 in emergency situations, but yields will be reduced because of limited moisture in the summer and cool temperatures during the fall. When utilizing any of the summer annual crops in a planned rotational grazing situation, two seedings should be made about three weeks apart. This will stagger the maturities and make grazing management easier. Forage and grain sorghum planted for forage should be planted in rows to facilitate harvest and minimize lodging. Avoid planting the sorghums too deeply as emergence problems may occur when planted deeper than one inch in most Pennsylvania soils.