Periwinkle-blue, star shaped flowers appear on dark stems with olive green foliage.  Low maintenance.

 
Bloom Time: Late Spring/Early Summer.

Growth Habit: 24-30″ in height, 38-42″ in width.

Foliage: Olive green with silver veins.

Sun/Shade: Sun, Partial Shade.

Hardiness Zones:  4-9.