Panicum amarum is a clump-forming, warm season, perennial beach grass that is native primarily to sandy locations in coastal areas from Connecticut to Florida to Texas. ‘Dewey Blue’ is a cultivar that typically grows 3-4’ tall and is noted for its attractive powder blue foliage and fountain-like form. Blue-tinged flowers appear in late summer to early fall, followed by beige seed heads that persist well into winter. Stems reportedly retain vertical form without flopping throughout the growing season and into winter.