Creeping mazus cannot simply be overseeded in a turf grass lawn, as turf grasses are considerably more aggressive and will win the rooting battle. If you do want to replace an area of turf grass, you must first kill off or remove all the grass. Turf grass can be removed with a sharp, flat shovel, but a more effective method is to kill it off with glyphosate herbicide before replanting with creeping mazus.