Delta Blues™ Chastetree was the first intermediate variety of the species to be introduced, roughly two-thirds the size of the species, not nearly as coarse in texture, has richer blue-purple flowers that bloom from June to October, and dark green foliage. Delta Blues™ is deer resistant, salt tolerant, and adapts to acid or alkaline soils as long as the site is well drained. Introduced by Plant Introductions, Inc.