Controlling Zoysiagrass Creeping into Asphalt Driveways

Zoysiagrass spreading into an asphalt driveway can be managed with two main approaches. Monthly spot-spraying with glyphosate (Roundup) along the driveway edge will gradually kill the encroaching grass. Alternatively, a soil sterilant containing prometon, imazapyr, or oxyfluorfen prevents any plant growth for several months—but use extreme caution, as these chemicals can harm nearby ornamental plants if their roots contact the treated soil.