Perennial: USDA hardiness zones 9a-11 (lows -6.7 °C or 20 °F)
Annual in colder zones
Full sun to part shade
Height: up to 15 feet
Spacing: at least 6 feet, 15′ for perennials
Flowers: maroon, purple, white
Velvety silvery-gray leaves
Blooms all season