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Northern Sea Oats - Ornamental Grasses - University of Illinois Extension

Types of Ornamental Grasses

Northern Sea Oats
Chasmanthium latifolium

Zone: 3-9

Height: 2-3 feet

Northern sea oats is an upright-narrow to arching perennial with rhizomes. It does very well in rock gardens and as an accent or specimen plant. Flowering occurs from June to September. The flat, green seedheads turn rusty, tan, brown or bronze lasting all winter. The seed heads along with the bronze foliage provide excellent winter interest. Northern sea oats can sometimes become invasive due to the large amount of seed that falls to the ground and germinates along with its rhizome habit of growth. Northern sea oats does well on fertile, light to heavy well-drained soils. It prefers moist sites but will tolerate some drought. In full sun northern sea oats is lighter green than plants grown in partial shade. It does best in partial shade.