Perovskia Plant Care:
Prefers somewhat dry soil with good drainage. To obtain fuller plants, pinch back by 1/2 when they reach 12. Will benefit from gravel mulch. Can be divided every 4 - 6 years in spring or fall. Offsets from side of clump can be dug and transplanted. Shouldn't be cut back further than 1' after frost in the fall, leaving some stem buds for next year's growth. Clean up old foliage and stems in spring.