John D. Byrd, Mississippi State University, Bugwood.org
Common chickweed is similar to mouse-ear chickweed but has significantly fewer hairs, if any at all. Its smoother leaves are one way to tell this weed apart from its cousin. It's a succulent winter perennial or annual that grows in dense patches in most any landscape. It also produces small, white flowers and light green leaves.
Applying a pre-emergent herbicide in late summer or early fall is one way to keep this weed from invading the lawn. For established weeds, use a postemergent herbicide containing triclopyr or penoxsulam for optimum control. Applying the herbicides to actively growing chickweed will work more effectively than applying it when the weed is mature.