White Top Grass

About White Top Grass

White Top Grass, also known as Common River Grass, is a vigorous perennial grass that dominates the seasonally flooded landscapes of the Northern Great Plains and adjacent regions. Reaching heights of 3 to 6 feet, it is named for its pale, shimmering flower heads that appear in early summer, creating a 'white top' effect across vast wetland expanses. This species is uniquely adapted to environments that experience significant spring flooding followed by gradual drying in the summer, such as prairie potholes and river margins. It is a critical species for wildlife, providing essential nesting cover for waterfowl and serving as a high-quality forage for various herbivores. White Top Grass spreads rapidly via thick rhizomes, making it an excellent choice for large-scale wetland restoration and erosion control in flood-prone areas. It requires full sun and thrives in wet to medium-wet soils. While it may be too expansive for a small garden, it is a foundational species for restoring the ecological health and productivity of northern wetland systems.