What is this perenial lawn weed?

Question: This weed is coming from my neighbors and is starting to infest my well kept lawn.
What is it and how to best get rid of it???   It is perennial
Thank you

responder: An Ask Extension Expert Replied October 03, 2024, 10:49 PM EDT
response: Thanks for your question. I need three further pieces of information: 1).  How do you know it is a perennial? 2).   How is it coming from your neighbor’s yard?  Is it spreading on the ground from his/her yard?  Are seeds from your neighbor’s yard being blown into you yard?   3). Is this the first time you’ve noticed it, or have you seen it in past years as well? Many thanks. Looking forward to your response.

responder: The Question Asker Replied October 04, 2024, 8:30 PM EDT
response: I remember seeing some of this last year too in my yard. Just not as much. Nowit seems to be spreading. I have to assume the wind brings over seeds or spores from neighbors. Their yard is full of it but they don't maintain like I do. Many of the yards in this area have this also. Gold looking.  Now I  can see little isolated spots of it starting ot show up in the middle of good grass.My suspicion is its perennial.Hope this helps. WayneSouth MinneapolisOn Fri, Oct 4, 2024 at 7:56 AM Ask Extension <<personal data hidden>> wrote:

responder: An Ask Extension Expert Replied October 04, 2024, 9:00 PM EDT
response: Thanks for your response. I have a pretty good idea what it is. It’s a type of grass.  Grass does not spread by spores. I suspect  that you might have sodded your yard recently. If so, when. If not sodded have you recently overseeded your turf. If true, what was the composition of the seed you used. Your situation is purely cosmetic but I do understand that you want to improve its appearance.  One final question. Just because your neighbor’s yard has this “weed” in it, can you be sure that it has spread to you? Might it be possible that it independently arose in your yard?  What about your other neighbors?  Do you think that your neighbor’s “weed” spread to them as well?  Give some thought to my question as your answer will be central to my suggestions to you. Improving the appearance of your turf  will be my goal . Thanks for consulting with us.

responder: The Question Asker Replied October 05, 2024, 6:05 PM EDT
response: I have not sodded or seeded my lawn. I am not sure if this weed comes from my neighbors lawn but  I didn't have it before last year and its slowly spreading in mine. I also keep my lawn watered and fertilized. Neighbors either side don't.I agree it might be a grassy weed. Hope we can zero in. Be glad to answer any questiions you may have.Thanx so far!WayneOn Fri, Oct 4, 2024 at 8:00 PM Ask Extension <<personal data hidden>> wrote:

responder: An Ask Extension Expert Replied October 09, 2024, 12:39 PM EDT
response: Thanks for your question. Based upon the information you provided, the following facts exist: 1). This is a type of grass that stands out from the rest of your turf. This is what brought it to your attention. Its actual origination is unknown. It may or may not have come from an adjoining property. I now doubt that an external point of origin existed. 2). This grass is seen in other yards near you. These may be isolated and individual occurrences or in some way related to what is present in your yard. 3). Since you have seen it in your yard in both 2023 and 2024, this would indicate that it is perennial type of grass. In running the pictures of this grass through various ID apps available to me, I do not get consistent identifications. I would suggest that to plan for 2025 in an informed manner, an absolute identification needs to be made for this grass/weed. Consider submitting a sample of this grass to the Turfgrass Diagnostic Laboratory at the University of Wisconsin. They are an excellent facility with a great reputation. Contact them ahead of time to determine how best to submit a sample. They have a small fee that they charge for their services. I think it is on the order of $20 to $30. See: https://tdl.wisc.edu/ I apologize for how long it has taken to get some type of resolution on your question. Thank you so much for your patience and your use of our services.

responder: An Ask Extension Expert Replied October 11, 2024, 6:07 PM EDT
response: Just an added comment.  While I still feel that submitting a plant sample to the Turfgrass Diagnostic Laboratory is my best advice, a Master Gardener colleague has reviewed my communications with you. He has suggested that this grass is Creeping Bentgrass (Agrostis palustris). I greatly value his opinion and think that he might have made the correct identification. See the following: https://www.canr.msu.edu/ipm/diseases/creeping-bentgrass?language_id= https://plants.ces.ncsu.edu/plants/agrostis-stolonifera/ https://apps.extension.umn.edu/garden/diagnose/weed/grass/creepingbentgrass.html https://apps.extension.umn.edu/garden/diagnose/weed/idlist.html - CBentgrass I would appreciate any further thoughts that you might have. Thanks for consulting our forum.

responder: The Question Asker Replied October 12, 2024, 6:10 PM EDT
response: You may be right about creeping bentgrass. Only trouble is that according to the enclosed websites control is limited to a liquid that contains glauco......somethingand that liquid will kill all grass too requiring reseeding. Whuf.Think I will have lawn care company come out and look at it.You have been very helpfull.Thanks,Wayne HoppkeOn Fri, Oct 11, 2024 at 5:07 PM Ask Extension <<personal data hidden>> wrote: