|This is a fast growing, spreading perennial, treated as an annual in cooler areas. Flowers profusely throughout the summer, attracting butterflies. Leaves are 1 inch long, dark green, with coarsely toothed edges. The yellow, pink, and purple blooms appear in domed clusters, covering the plant from summer to frost. Thrives with full sun, low moisture and poor soil. Withstands salt spray too.