This phlox has an arching habit, and grows to be about 12-18" tall. Since it spreads by rhizomes, it will, in time, form a nice clump. Clusters of lavender-to-blue, five-petaled flowers bloom in mid-May. The leaves are opposite, ovate and about two inches long. Blue phlox, which is native to woodlands, is most frequently found at their edge in dappled light. This is our native midwestern phlox. Blue or woodland phlox is a good edging plant for shade or naturalistic gardens.