Ground cover consists of a variety of spreading plants that never reach heights of more than 12 inches or so. Ground cover plants slow erosion and provide a natural carpet beneath taller plants and hedges. Because ground covers spread, they may be relatively dense and difficult to weed. There are some tricks, however, to get grass out of ground cover. It takes patience and precision, but once complete it improves the look of the garden.
Peel up a section of ground cover, being careful to keep the roots intact.
Hold the section of ground cover up with one hand, and with the other hand grasp the grass runner where it enters the ground.
Pull the grass runner gently until its roots are free. Continue to slowly pull the runner, following it throughout the ground cover, being careful not to yank or snap it. In each place it has rooted, pull until that section releases.
Lower the ground cover, and move to another section. Follow this procedure until all grass runners have been removed.
Gently peel back ground cover where areas of grass invasion are profuse. Lay a bath towel over the ground cover so that it prevents the ground cover from falling back into place. This should leave the grass runners exposed.
Spray grass runners with weed killer, being careful not to contact any ground cover with the spray. Allow the weed killer solution to dry.
Remove the bath towel, and gently place the ground cover back in position. Continue this procedure in any area where the grass invasion is extensive.