Baptisia

-australis  

The australis has indigo-blue flowers on spikes that can be up to one-foot long over soft blue-green foliage.

Bloom Time:  Mid-late Spring.

Growth Habit:  3-4' in height.

Foliage:  Blue-green. 

Sun/Shade:  Sun, Partial Shade.

Hardiness Zones:  3-9.