Named for its soft, silvery gray leaves, this plant produces purplish flowers in July. Best when the old flower stalks are removed following bloom. It grows 1 ft. tall and spreads itself liberally about the garden. It prefers full sun, well-drained soil and once-a-week watering. Silver Carpet is a non-flowering cultivar that is lower in maintenance and less invasive. This plant is not bothered by rabbits, squirrels nor deer.