Panicum virgatum A native prairie grass. Upright clumps of blue to green foliage grow 4 to 5 feet tall and 2 to 3 feet wide. Fall color in yellow and bronze shades. Airy pinkish blooms 1 to 2 feet above foliage in July. Great for naturalizing. A warm season grass. Full sun in moist or dry soils of avera. Nice in wet areas. Quick to establish. Re-seeds. Remains upright in winter. Switch Grass