Linum perenne-- Flax Blue is a drought resistant, sun loving, graceful plant with clusters of sky-blue flowers that last 6 to 12 weeks.  The pleasing 1/2 to 1 inch azure blue flowers appear on airy, delicate, gracefully arching branches.  The blooms last one day, but they are continually replaced by new ones.  The Blue Flax blooms from late spring to late summer.  They will bloom longer in cooler climates.  The Blue Flax requires full sun or very light shade.  Place them in well drained soil and after flowering, shear back the plants.  Plant in the spring after the last average frost date or 2 months before the first fall frost.  Flax looks great when planted in mass and in rock gardens.