'Northwind' Switchgrass has green-tan seedheads above blue-green foliage with a very upright habit. Introduced by Roy Diblik of Northwind Perennial Farm in Wisconsin. Our favorite upright Panicum, and the perfect tall grass for tight spots. An excellent tan in the winter. 2014 Perennial Plant of the Year. Bruce Neary of BCN Horticultural Services loves 'Northwind' because it never flops.