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Perennial Weeds #929320

Asked April 23, 2026, 9:38 AM EDT

I am in the Landscape Like You Live Here Class and have some follow up questions. I have some weeds that are becoming prettying invasive in the yard. Normally I have just learned to live with them but am reaching a point where I am ready to potentially treat with Chemistry. Since yards have not greened up yet this year I thought this might be a good year to get rid of them. The green parts of the laws are where the weeds are coming in. I have attached a few photos. Any opinions or strategies you can help with would be appreciated.

Douglas County Colorado

Expert Response

Hi Eric,

From the photos, it looks like you have tall fescue invading the bluegrass lawn.  Tall fescue is sometimes used as a turfgrass on its own, and some "turf types" have been bred for higher quality.  The weedier, more natural form will blow into lawns and set up shop, creating clumps of coarser textured, often more quickly growing grass in the lawn.

Unfortunately, there's not a selective herbicide product that you could use to kill it and leave the lawn, your options (other than, as you noted, living with it) are to either spray it with a non-selective herbicide or dig it out and then to replace it with desirable species, either via sod or seed.

I hope this helps!  Let me know if you have other questions.

Cordially,

John

An Ask Extension Expert Replied April 23, 2026, 1:53 PM EDT

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