Unbelievable when in flower! This tough and vigorous grower adds color and fragrace to the summer garden that attracts bees and butterflies.  Add countless flowers of violet-blue, the licorice fragrance of the foliage, and you have no reason not to have one of these in your garden. Attracts bees and butterflies. Excellent cut flower. Prefers average to dry soils. Blooms July-September.