Perennial: Earlier than most varieties. Good woodland, rock garden or border plant. From late spring until late summer it produces an abundance of dainty sky blue bell-shaped blooms. Compact, mounding habit. Attracts butterflies and hummingbirds. Bloom time: spring-summer. Bloom color: sky blue. Height: 6-12". Width: 10-12". Exposure: sun/part shade. Water: moderate. USDA Z4.