Panicum virgatum 'Northwind' (Switch grass)
'Northwind' is a narrowly upright, clump-forming, deciduous perennial grass with flat, linear, olive- to blue-green leaves, turning yellow-brown in autumn, and feathery panicles of tiny, yellow flowers in early autumn.
Grow in full sun in moderately fertile, well-drained or moist but well-drained soil. May flop in fertile soils. Primarily clump-forming but may slowly spread by creeping rhizomes. Will reach a height of 2m and a spread of 0.75m after 2-5 years.