Zoysiagrass, a warm-season grass, turns brown at the first frost. It is a popular turf grass in the southern regions of the United States for its ability to withstand high traffic and drought. In cooler areas to the north, zoysiagrass can become unsightly in the fall and winter when it naturally goes dormant. Zoysiagrass is difficult to remove. To completely and quickly eliminate zoysiagrass, kill the existing lawn and reseed. Begin the process in early August, on a windless day.
Spray herbicide over the entire lawn. Don't miss any areas and saturate the vegetation with the herbicide. Keep the spray away from any desirable plants. Read and follow the herbicide label directions carefully.
Mow the lawn to 1/2 inch tall after it has turned brown and died.
Wait three to four weeks to allow any new zoysiagrass seeds to germinate. Apply the herbicide to any new growth. Wait another two weeks and reapply the herbicide to any new zoysiagrass growth.
Remove the dead grass and reseed or sod the lawn.