Blue phlox is a native herbaceous perennial wildflower in the Polemoniaceae family that may grow 6 to 12 inches high.  Clumping or spreading horizontally, it is native to eastern North America.  Prefers bright shade with organic, rich, moist, well-drained soils. Give good air circulation to reduce growth of powdery mildew. Benefits from occasional fertilization. May be propagated by terminal shoot or root cuttings. Cut back after first bloom to promote second round of growth. Makes an excellent addition to the perennial, naturalized area or rock garden.