Daggerleaf Rush

Juncus ensifolius (Juncaceae) is a rhizomatous rush native to western North America from Alaska to central Mexico, with disjunct populations in eastern Canada, Japan, and the Russian Far East. It grows to about 2 feet tall and spreads at a moderate rate by rhizomes. The species produces purple flowers, green sword-shaped foliage, and brown fruit capsules.

Daggerleaf rush is a true wetland emergent, adapted to saturated soils in seeps, springs, riparian zones, stream margins, and pond banks. It requires consistently high moisture and tolerates a pH range of 6.0 to 8.0 in sun to part shade. Minimum root depth is about 11 inches. Drought tolerance is low. The species serves restoration and rain garden plantings where a native, low-maintenance rush is needed for permanently wet sites. Hardy in Zones 3b to 9b.