creeping spike rush

Creeping spike rush (Eleocharis palustris, Cyperaceae) is a grass-like perennial of wetland habitats, reaching 2 to 4 feet tall and 1 to 2 feet wide. Greenish-brown flower spikes appear from June through September on slender, erect, leafless stems that spread by rhizomes.

Creeping spike rush grows in sun to part shade in wet soils and shallow water, hardy in Zones 3 to 8. It tolerates erosion and saturated conditions. No significant pest or disease issues are documented. No cultivars are in the trade.