Perennial: Evergreen. Deer, drought & gopher resistant. Named after two polar opposite colors of gemstones, onyx refers to its dark foliage & pearls refers to its soft lavender flowers w/white interiors. From a distance, the flowers look white. Compared to 'Blackbeard', it is taller & fuller w/lighter colored flowers. Good bed/border & cut flower plant. Attracts butterflies & hummers. Blm time: summer-fall. Size: 36-40" x 40". Exp.: sun/part shade. Water: dry. USDA Z3. PPAF