Upright, shrubby perennial, reaching 3 – 4 foot tall and wide, spreading by underground stems. Greyish, lacy, aromatic foliage, producing spires of small violet-blue flowers in late spring and summer, which create a haze of soft color. Plant in full sun where it will be heat and drought tolerant once established. Beloved by pollinators, bees, butterflies and hummingbirds. Deer and rabbit resistant.