Swap sloping lawn for a drought-tolerant, sun-loving groundcover with an easy-grows-it personality. Woolly thyme fits the bill perfectly. The woolly leaves form a gray mat that shrugs off pests and diseases. In summer, this groundcover bursts into bloom, transforming any space into a blanket of pink. Woolly thyme demands good drainage and stands up to moderate foot traffic. Plants aren’t useful in the kitchen, but are hardy in Zones 6 to 10.