Compact Candytuft (Iberis sempervirens) is a low growing little beauty, covered with clusters of bright white flowers in spring. Spreading nicely to over 1' wide, it fills crevices between stones and pavers, and will lighten the mood wherever it's placed in your rock garden. When planted in mass, Compact Candytuft wonderfully cascades down a hillside or spills gracefully over that bland retaining wall you've been wanting to dress up.