Common perennial with long, green leaves that reach 3+ ft. Found near margins of various wetlands, lakes and ponds. Creates large colonies both vegetatively and by seed. Produces erect purple flowers. Planting depth 2-24 inches. Found in Zones 7-11. Sun-part sun and flood tolerance. Wildfowl/life value. Often planted with Arrowhead and Spikerush. Helps pull phosphates and nitrates from water and improve water quality.