Siberian Irises are easy to grow perennials with a sturdy and upright shape, forming clumps of grassy foliage with an early summer display of attractive and unique flowers.  Siberian Iris are tolerant of wet sites, and will even grow in the shallow water at the edge of a pond or stream. 
Concord Crush features unique curling petals that form striking, violet-blue 5" wide, double blooms.
Hardy to Zone 2