Lobelia siphilitica

Easily grown in rich, humusy, medium wet to wet soils in full sun to part shade. Needs constant moisture. Will tolerate full sun in cool, northern climates, but otherwise appreciates part shade. Divide clumps in spring as needed. May self seed in optimum growing conditions, forming attractive colonies. Typically grows in moist to wet locations along streams, sloughs, springs, swamps, meadows and in low wooded areas. ...