18" tall x 18" wide (seed propagated). This prairie wildflower that endears itself to everyone who sees it in flower. Purple Prairie Clover is a heavy bloomer. The intensely red-violet flowers punctuate the stiff, upright stems, adding a nice structural element to the garden. Being a deep-rooted legume, Purple Prairie Clover adds valuable nitrogen to the soil and helps keep it fertile for neighboring plants. Well adapted to many different soil types, even tolerating clay.