Perennial Shrub: Tolerates drought, deer and gophers. Tall border plant and cut flower. Good for under tree canopies. Beneficial plant for insects, butterflies & hummingbirds. Stunning blooms have chartreuse calyces that hold vibrant violet-blue tubular flowers. Size: 4-6' x 4-6'. Exposure: part shade. Water: moderate. USDA Z9.