Trachelium caeruleum 'Dark Knight'

Nice heirloom perennial forms a clump 2’ high and wide with stems topped by butterfly attracting VIOLET frothy flower heads 3-4” across; softly fragrant summer thru fall.  Full sun in the north and on the coast and part shade in hot sun areas; regular water and loamy well drained soils will make this plant happy!  Ignored by both snails and slugs…go figure! Reseeds politely which is good because it can be short lived due to its intense flowering!