How to Plant Rock Cress Seeds ABOUT ROCK CRESS: Rock cress would easily grow in the crumbling rubble of civilization since it needs little soil, is drought-tolerant, and takes hold and thrives in the cracks and fissures of rock and concrete. Its masses of four-petaled blooms all but hide its fine, dense green evergreen leaves; in spring and early summer it "mutates" into waves of violet, pink, or white, forming cascades over walls and rock borders. There are about 25 Aubrieta species, all with similar growth profiles. Our current favorite is purple rock cress (A. deltoidea), which is often considered the genus standard. Even if your past gardening attempts have ended in cataclysmic disaster, you'll manage to grow a carpet of spectacular color if you give this plant a try. Seed packets , Organic seeds , Garden seed kits , Heirloom seeds , Non-GMO seeds , Vegetable seeds , Flower seeds , Herb seeds , Seed starter kits , Bulk seeds , Fast-growing seeds , Seed planters , Annual seeds , Perennial seeds , Indoor seed kits , Seed catalog , Microgreen seeds , Wildflower seeds , Seed subscription box , Seed tray sets