Plant Russian Sage 'Blue Jean Baby' (Perovskia a. 'Blue Jean Baby') where you can give it sun, space, and sharp drainage, and it will reward you with a long season of hazy lavender-blue flower spikes above silvery, aromatic foliage. You will get a tidy, upright habit that feels light and airy in the garden, but still shows up well as a repeat accent in borders and mixed plantings.
At maturity, expect roughly 30-34 inches tall with a spreading shape that fills in without looking heavy. Set plants where reflected heat and lean soils are not a problem, and avoid rich, constantly wet ground. If your soil holds water, improve drainage or choose a higher spot so roots do not sit wet through winter.
For best performance, give it full sun, though it can handle part shade. Water regularly during establishment, then ease back once roots are settled. In early spring, cut stems back hard to encourage fresh growth and a denser, more uniform mound. Leave old stems in place over winter for added protection, then prune when new growth begins to push.
This Russian sage pairs easily with ornamental grasses and other sun-loving perennials, and it is a strong choice when you want reliable color, texture, and a plant that does not demand constant attention.