Festuca glauca is Blue Fescue
common name for Helictotrichon sempervirens is BLUE OAT GRASS
common name for Calamagrostis spp. is FEATHER REED GRASS
common name for Pennisetum alopecuroides is PERRINIAL FOUNTAIN GRASS
Calamagrostis spp, is the one with the stiff yellow heads
Stipa Gigantea has the white feathery tops in the shade
Huge one, tall as a house is Saccharaum racennae
This is Helictotrichon sempervirens - it has super knobbly bits and light whispy airy seed heads
yes, always
trim grasses before new growth
Warm are slow in spring, cool are very early in the spring and combed are evergreen
yes, they all want full sun