Pennisetum glaucum Annual grass. Up to 6'. Frost sensitive. Taller than Japanese millet but with a tighter bunching habit. Tolerates drought and sandy soils. Seed when soil is 60° or warmer at 25–50#/acre, 1#/1000 sq ft.
As a cover crop: Somewhat slower to establish than Japanese millet, and the bunching habit makes it less competitive with weeds, but if organic matter is your goal then pearl millet has a higher biomass production potential over the course of the season.
As annual forage: More productive and more digestible than Japanese millet. Suitable for grazing, silage and dry hay. Harvest before boot stage, at 18–24" high, and leave ample stubble to ensure vigorous regrowth.