How to Eliminate Fescue from a Bermuda Lawn

Reclaiming Your Bermuda Grass from Fescue Invasion

Accidentally overseeding a Bermuda lawn with fescue is a common headache for homeowners. The cool-season fescue quickly outcompetes the warm-season Bermuda, leaving a patchy, uneven turf. Fortunately, a targeted approach can restore your lawn's uniformity.

Effective Control Strategy

The most reliable method combines a selective herbicide with proper mowing practices. Apply imazaquin (sold as Image for Nutgrass) in late May when fescue is actively growing but Bermuda is not yet fully vigorous. Follow the label instructions precisely for mixing and application rates.

Simultaneously, maintain a consistent mowing height of 1.5 inches. This low cut stresses the fescue while encouraging the Bermuda to spread laterally via stolons and rhizomes. The combination of chemical suppression and cultural pressure typically eliminates fescue within a single growing season.

Timing and Follow-Up

Late spring application is critical because imazaquin works best on young, actively growing fescue. A second application may be necessary four to six weeks later if any fescue persists. Once the fescue is gone, resume standard Bermuda maintenance: mow at 1 to 1.5 inches, fertilize according to soil test results, and water deeply but infrequently.

With patience and the right protocol, your Bermuda lawn can recover its dense, weed-free appearance.