Perennial: Evergreen. The Halo series are hardy, heat tolerant and long lasting in the garden. Nice rock garden, ground cover, border, container, cut flower and bedding plant. Attracts butterflies. Abundantly flowers from spring-fall. Bloom color: sky blue with bright yellow centers. Height: 8-10 inches. Width: 10-12 inches. Exposure: sun/part shade. Water: moderate. Shade and drought tolerant. USDA Z4-9. PP #24,541