Ground ivy (Glechoma hederaceae), also called creeping Charlie, is a common lawn weed problem. Shady lawns with poorly drained fertile soil are typical sites for ground ivy to develop into a major problem. This plant may form extensive patches as it creeps along the soil and moves into sunny areas. The stems are square and the leaves are arranged opposite of each other along stems. The leaves are round to somewhat kidney shaped with rounded, toothed margins. Crushed leaves have a minty odor. Ground ivy has small funnel-shaped purplish-blue flowers appearing from April to June.
To keep ground ivy from invading lawns, maintain a thick lawn by using proper lawn care practices. (Mow high, mow often, and keep your blades sharp just to name a few.)
Unfortunately, grasses in shade areas are not as competitive against weeds as those in full sun. See Managing Lawns in Shade Areas on this website. In some shade situations, the ground ivy may function quite well as a groundcover and be desirable.