A hardy, low-maintenance perennial, dusty miller (Senecio cineraria), is valued for its fuzzy, silvery-gray foliage that serves as an effective contrast to flowering plants. Dusty miller is often planted in flower beds and is especially striking in containers where the lacy foliage is viewed up close. Dusty miller comes in several varieties, all of which have silvery foliage, but the shape of the leaves is slightly different. The mature height of the plant ranges from 8 to 18 inches. Although dusty miller is often grown as an annual, it is perennial in U.S. Department of Agriculture plant hardiness zones 8 through 10.