Southern Blue Flag Iris Seeds 20 count Iris virginica var. shrevei, Southern Blue Flag Iris, usually grows in large patches that expand outward from rhizomes. It is 2’-3’ high with the leaves on the flower stem growing slightly taller than the flower. Bloom time is from late spring to early summer. The bloom color is somewhat variable, but is most often a medium to pale blue violet. There is a yellow blotch on the lower sepal where it joins a small upper lip; a mark that helps to distinguish the flower from those of Iris versicolor, Northern Blue Flag Iris. Southern Blue Flag Iris Seeds 20 Count