Rock Cress is an extremely popular rock garden plant, and a familiar sight in the spring garden. It forms a low cushion of evergreen leaves, literally smothered by flowers for several weeks. This selection has rich purple flowers, the foliage is grey-green with an edging of white or creamy yellow. Plants should be trimmed lightly immediately after blooming, to encourage a thick mounding habit. Excellent choice for a rock garden in sun or part shade, growing over rock walls, or in alpine troughs and other containers.