Purple sage is a shrub that can grow 4-6 feet tall and just about that wide. It thrives during hot summers and can withstand drought, as it did in my yard over the last couple of years. In my yard, it lives in a bed where I very seldom provide any supplemental water and so it has to be tough enough to find the moisture it needs and survive on its own. Last summer it dropped a lot of its leaves, and the ones that remained looked wilted most of the time, but it managed to survive until the rains came again. Then it put on a growth spurt, developing new leaves and limbs. It is now full of the attractive silver rounded foliage that provides such a nice background for the snapdragon-like flowers that cover the bush. As the blossoms mature and fall, they carpet the ground beneath with their pink beauty.
This is a shrub that is very amenable to shaping or shearing. I cut mine back pretty severely in late winter and it never missed a beat. It just got fuller and leafier and more attractive (to my eye anyway). It really is an excellent shrub for our area, particularly if you need something in the gray palate. According to the plant guides, it will grow from zone 7b-10. My 9a garden is right in its happy zone!