Broomcorn: Sorghum vulgare var. technicum.
Benjamin Franklin is credited with introducing broomcorn to the United States in the early 1700's. Although commonly called "broomcorn", it is not truly corn. The stalks are similar to corn but they do not produce ears.
Broomcorn prefers full sun, well-drained fertile soil, and plenty of water. As the plant matures, the seed heads will deepen in color and the seeds will become heavier and shiney. Seed heads can be harvested for fall decorating or traditional broom making. USDA Zones 2-11.