These plants, which are easy to grow, form dense evergreen mats, blanketed in early summer with countless small flowers. They require full sun and well-drained soil, and that is about all. Thyme is a perfect ground cover for hot, dry places and makes a delightful edging for an informal path. Because it tolerates foot traffic, it"s also excellent for planting between stones in a dry-laid terrace or walk. Pot-grown