Plant certified seed of adapted hybrids. Do not use bin run seed because it lacks hybrid vigor and is of unknown quality. In addition to yield potential, maturity is of primary importance in selecting a hybrid that produces mature, dry grain during a normal growing season for a particular area.
Sorghum hybrids are classified into maturity groupings such as medium-full, medium, medium-early, and early. For Pennsylvania, in corn maturity zones 3 and 4 (see Figure 1.4-1), medium maturity hybrids are adapted to full-season production. Early medium and early sorghum hybrids should be grown in corn maturity zones 2 and 1, respectively. Try not to select a hybrid that is too late, as harvesting becomes difficult if the crop gets frosted before maturity.
Determine market availability before seeding a bird-resistant hybrid. Most available hybrids are not bird resistant, but it is wise to confirm this with your seed dealer before planting.