Blue false indigo, with the botanical name Baptisia australis, is a lovely shrub that blooms in the late spring in zones 3-9 in full sun or part shade. It grows about 4 feet tall and as wide and is drought tolerant and deer resistant and has blue/green foliage and blue flowers that resemble lupins. 

It was used by pioneers to dye cloth and is called 'false indigo' because its color is not as deep as true indigo. It has a big root system that cannot be divided. However, it grows easily from seeds. Gather the dark-colored seed pods in the fall and start new plants any time. 

This plant has been hybridized so that there are now white, purple, and yellow flowering varieties available and some that are smaller. 

They prefer full sun and good drainage to bloom well and can be planted as a hedge or as a background plant. The foliage stays grey/green and crisp and neat until late fall when it can be cut to the ground. I have mine in the front of a large flower bed, but if I was planting it now, I would place it at the back of a bed, as its flowering period is short, and it tends to self sow. However, the foliage always looks cool even on the hottest day of summer.