Feather Reed Grass- Calamagrostis Feather reed grass is being planted widely because of its architectural shape and easy growing requirements. “Karl Forester” is a favorite variety. Growing in zones 4-9, Feather reed grass needs sun to part sun, average water, and not much else! Blooms early in the summer. A favorite in more contemporary gardens and in commercial spaces for its upright growth habit. One of our favorites!