Switch grass, Panicum virgatum, is one of many native prairie grasses that have been developed as ornamental grasses. Switchgrass – also called tall panic grass, tall prairie grass, wild redtop, thatch grass, and other common names – is one of the main species of grasses of the North American tallgrass prairie, ranging from southern Canada to Mexico, over most of the United States east of the Rocky Mountains. It can be found in remnant prairies, in pastures, along roadsides in many areas, and even in brackish marshes. In the garden this species can provide nearly year-round interest, as the plants remain upright throughout the winter. It is also employed for soil conservation (to prevent erosion) and as forage or hay for cattle (but not other livestock), and it’s use as a biofuel has been explored by researchers. It is hardy in zones 3-9.