Perennial GrassesPerennial grasses are being used in the landscape as well as combination planters. In addition, native warm season grasses are excellent choices for erosion control or ecological restoration. Additional Information on Ecological RestorationGrasses start to grow dependent on temperature. Cool season grasses start to grow in early spring and also may during winter. They also do better when temperatures are cool and if given sufficient water. Warm season grasses wait until the soil becomes warm and temperatures are stable. Cool Season: Overdam, Karl FoersterWarm Season: Maiden Grass, Little Zebra, Big Bluestem, Little Bluestem, Switch Grass, Flame Grass