A weed with oval bright green leaves grows in shady, moist areas of the lawn. Tiny white flowers with blue edges bloom on stalks taller than the leaves. On the stems below the flowers are heart-shaped seedpods. Speedwell, also called creeping Veronica, was originally used as a rock garden plant but has become a weed, invading lawns and flower beds. In a few years, it can spread from a few patches to cover the entire lawn. It does not completely crowd out desirable grass, however.
Speedwell is difficult to control but does not invade areas that are well fertilized, are well drained, and get lots of sunlight.