Perennial but grown as an annual: Evergreen in warm climates. Great in beds or containers. Grows best in full sun and has a long flowering time. Attracts butterflies and hummingbirds. Flowers are 1-1.5 inches long. Bloom time: spring-fall. Bloom color: white. Height: 1-2'. Spread: 1 foot. Exposure: sun. Water: moderate. USDA Z11.