Alamo switchgrass was originally collected in Live Oak County, Texas. It produces a high level of biomass and is a prolific seed producer, giving it value as both a forage and soil stabilizing species. Plants are blue-green and usually slightly waxy. They are taller than the Blackwell variety; with stems larger and the leaves usually longer and wider. Flowering occurs 1 to 2 months later than in Blackwell. Seed are smooth and shiny, with about 426,000 per pound.
Good pasture forage and hay for livestock and wildlife. Provides cover and food for upland game birds and small mammals.