Stoke's Aster

Stokesia

Stokesia laevis 'Purple Parasols' Stokes Aster
Flowers are 10cm.(4") wide, begin as a powder blue in July and go through various darkening stages (pure dark blue, indigo, purple) until finally in September turning a deep violet.

Stokesia / Stoke's Aster : Stokesia laevis