Fescue is a tall, hardy grass that grows wild throughout many regions of North America. In certain areas, fescue can be quite a problem. Because this cool-season grass grows rapidly when most plants are dormant, it can easily overcrowd other plants and take over an area. Once established, fescue can be hard to get rid of. Hand weeding rarely works, even if you had the time and energy to pull up every plant in the thick patch. To permanently eradicate fescue, you must kill it with a broad-spectrum pesticide in early spring or early fall when it is actively growing.
Mow the fescue as low as you can. Then, wait two to four weeks to allow it to grow back to six inches in height.
Spray the fescue thoroughly with a commercial broad-spectrum herbicide, according to the manufacturer's instructions.
Wait one to two weeks for the fescue to die.
Observe the patch. If any more fescue sprouts, wait until it reaches six inches in height before spraying it with the herbicide again.
Allow three weeks of no re-growth to pass.
Till the soil to a depth of three inches.
Plant another variety of grass or other plant in the fescue's place.