Does Zoysiagrass Have Weeds?

Potential Weeds

• Zoysiagrasses produce a dense turf that is relatively more resistant to weeds than a number of other grasses, reports the Purdue Cooperative Extension. Some of the most common weeds in zoysiagrass include dandelions, white clover, garlic and wild onion. Some winter annuals likely to infest zoysiagrasses include henbit and chickweed.

Chemical Control

• The University of Maryland Extension recommends a number of herbicides for controlling weeds in zoysiagrasses. These include dicamba, dichlorprop, 2,4-D or MCPP, either singly or in combination. Combining herbicides is often more effective in controlling the more hard-to-control weed species. Using triclopyr in combination with clopyralid helps to control invasive weeds. Do not use herbicides containing dicamba under trees or shrubs especially in sandy ground. All chemicals are sold under different trade names.

Mechanical Control

• A smaller number of weeds is easily controlled in early stages of infestation by hand pulling or digging with a hoe. Timely control helps to keep the weeds from spreading, minimizing the use of herbicides later. Mowing is also effective in weed management. Use well-sharpened mowers and do not mow the grass very low, removing no more than one-third of total grass height at each time. The recommended mowing height for zoysiagrass is 1 to 1½ inches, according to the University of Arkansas Extension.

Cultural Control

• Maintain vigorous turf growth as healthy grass is naturally resistant to weeds. Keep lawns adequately fertilized with a recommended 1 to 2 lbs. of nitrogen per 1,000 square feet for zoysiagrasses every growing season. Make sure lawns are regularly dethatched and aerated to reduce stress. Patch any bare lawn areas immediately as these can rapidly get invaded with weeds. Irrigate deeply and infrequently to promote healthy root growth. Lawns that are frequently and lightly irrigated tend to have weak, shallow roots.