Dragon's Blood is an old reliable variety of sedum. We had this growing in the old Home Landscape Demonstration Garden, where the new greenhouses are now being built. This mat-forming perennial takes full sun to partial shade. It produces clusters of starry cherry-red blooms in July and August. The tiny leaves, green suffused with burgundy, are less than a quarter-inch in length, toothed and spatulate: narrow at the base and broad at the tip. Each stem reaches about 6-10 inches long, but they will root along the nodes into patches a foot or more across. Older stems may become scraggly and need to be pinched back. Because they are so low-growing, they are suitable for a rock garden or a ground cover for a dry area. Care should be taken that they don't need to compete with taller plants. Native to the Caucasus Mountains, they are hardy to zone 3.