If you’re looking for a ground cover that thrives in deep shade where grass and other plants refuse to grow, look no further than snow on the mountain plant (Ageopodium podograria). Also called bishop’s weed or goutweed, the shallow roots of this quick-growing, deciduous ground cover sit above those of most companion plants so that they don’t interfere with their growth. Solid green varieties provide a lush, uniform appearance, and variegated forms have white highlights that glisten in deep shade.