Chasmanthium latifolium

River Oats (Chasmanthium latifolium) is a perennial grass native to North America, prized for its distinctive, flat, oat-like seed heads that dangle gracefully from arching stems. It typically grows 2 to 4 feet tall and spreads by rhizomes, forming attractive clumps that can naturalize in gardens or along stream banks. River Oats thrives in partial shade but can tolerate full sun if provided with adequate moisture. It prefers moist, well-drained soils and is adaptable to a range of conditions, making it suitable for woodland gardens, rain gardens, and erosion control. This grass is valued for its ornamental seed heads, which persist into winter and provide visual interest as well as food for wildlife.

Native range

Eastern & Central United StatesNative here

Bloom time

June – September

Garden location

West Driveway Bed