Perennial: Drought, cold and heat tolerant. Good for containers, window boxes, hanging baskets, borders and beds. Attracts butterflies and hummingbirds. Bloom time: spring-fall. Bloom color: dark blue. Vigorous grower with a trailing growth habit. Height: 12-16 inches. Width: 18-24 inches. Exposure: sun. Water: moderate/dry. USDA Z8.