Dark Knight Bluebeard
This late summer bloomer goes by several common names - Bluebeard, Blue Spirea, Blue Mist - so we usually stick to calling it Caryopteris! Caryopteris is an easy, deer resistant, drought tolerant (but also tolerant of moist soils), and long blooming addition to your garden border. The plant in the photo is 'Dark Knight' which is a darker shade of periwinkle-blue from the common 'Blue Mist' variety. Both varieties put on a show with hundreds of flowers from July to frost, attracting honeybees and butterflies from all around.
A low maintenance plant, Caryopteris can be kept at 2-3' tall and wide with a spring pruning but will get larger if left unpruned. We find that our winters do some tip pruning anyways so it is best to clean them up in spring when you see new leaves emerge and pruning right above them, which can sometimes be as low as 6" from the base. They quickly recover into a nice mounded shape, looking dense and uniform. So they are great for the maintenance person that loves to come in and hedge trim everything!
With its aromatic, lance shaped leaves, this shrub has proven to be quite deer resistant. The leaves have a blue/silver tinge that look great with other silvers like Artemesia or contrast with purple foliage like smokebush. We find Caryopteris to be drought tolerant because of its very deep taproot but can look lusher with regular water in well draining soil. Full sun is best and they will tolerate reflected heat.