Moss Rose is a ground cover plant that many gardeners will turn to for the hottest, driest, most problematic spots in the garden, and it establishes nicely from Moss Rose seeds. This 6 inch tall Portulaca plant is a succulent that thrives in heat, drought, and lousy soil. It rewards gardeners with nonstop color. Yellow Portulaca ground cover looks at home in a sun-drenched area of the flower garden, a rock garden, or in containers. Plants often reseed themselves, coming back the next growing season with the same vivid color and beauty.