Lamium is one of the best choices for a tough yet showy perennial groundcover. This slow-growing selection forms a spreading patch of small heart-shaped chartreuse yellow and silver leaves. Clusters of rose-purple flowers appear in spring, then continue off and on until fall. Plants will burn if placed in any direct sun. Trim back in late winter. Stems will root into the ground where they touch, and any new plants that form can be easily moved in spring or fall. Also easily divided. Evergreen.