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Here are answers to some of the most common questions we receive about garden plants. You will find concise information on general gardening techniques as well as plant selection and care. For detailed information on specific plant pests and problems refer to our Common Garden Pests and Problems page.

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Horticulture Questions and Answers

Home  >  Lawn Care  >  Selection, Culture and Care  >  Pests and Problems  >  How do I kill zoysia grass or Bermuda grass in my fescue lawn?

How do I kill zoysia grass or Bermuda grass in my fescue lawn?

Zoysia grass and Bermuda grass are perennial, warm-season grasses that invade cool-season lawns, such as fescues, Kentucky bluegrass and perennial ryegrass.

Since selective herbicides that kill warm-season grass without also killing or damaging the cool-season graasses are not available your only good option is to spot-kill the areas with a non-selective herbicide such as glyphosate and then reseed or sod the areas.  Killing grass  is best done in late summer (July-August) just prior to early fall, the best time of year to seed cool-season grasses. Wait two to three weeks after applying glyphosate before reseeding. Reseed the areas between late August and mid-October with early September being ideal.