Switchgrass (Panicum virgatum) is a warm-season perennial grass native to much of the United States including Kentucky (USDA). Switchgrass can be grown on marginal soils and regularly produces high biomass yields (4 to 8 tons of dry matter per acre) in Kentucky. Switchgrass varieties are broadly classified into two ecotypes: lowland and upland. Lowland varieties, such as ‘Alamo,’ typically produce higher yields, while upland varieties, such as ‘Cave-in-Rock’ and ‘Kanlow,’ generally have higher forage quality.
Smith, S. Ray; Lea, Krista; Keene, Thomas Clarkson; and Schwer, Laura Mary Jane, "Wildlife Benefits of Switchgrass Production in Kentucky" (2016). Agriculture and Natural Resources Publications. Paper 95.