Thanks for the question.  Before I am able to answer it, I need to know the specific brand and type of grass seed you used.  The best thing for me would  e to receive a picture of the label on the bag of grass seed showing the composition.  Looking forward to receiving this.

Thanks for using our forum.

Thanks for getting back to us.

When I attempted to ID this grass, I came up with two possibilities: Smooth Meadow grass (Poa pratensis) and St. Augustine grass (Stenotaphrum secundatum). The latter grass is one that typically does not grow in Minnesota. Therefore, I believe what you are seeing is the smooth meadow grass. Since this grass was not mentioned on the seeds that you used, and that you observed this grass in areas that you did not seed, I believe that we can eliminate the seeds that you used as being involved. As the name of this grass (smooth meadow grass) suggests, it is very common in pastures and golf courses. Might you be close to either? I’m guessing that this grass ended up in your yard via the wind. It is a type of perennial bluegrass. Short of digging it up by hand, it may be difficult to eradicate it without damaging adjacent turf.

Here is some information about smooth meadow grass:

https://www.wildflower.org/plants/result.php?id_plant=POPR

https://www.friendsofeloisebutler.org/pages/plants/kentuckybluegrass.html

There is an annual type of blue grass (Poa annua). It is very hard to distinguish it from Poa pratensis. What you are seeing might be this. This would be consistent with your feeling that the grass in question is an annual. Here is some information about it:

https://www.minnesotawildflowers.info/grass-sedge-rush/annual-bluegrass

https://www.whenappearancematters.com/blog-posts/identifying-annual-bluegrass - :~:text=After all, annual bluegrass (Poa,in the lawn care industry.

Here’s the deal:

1). I cannot provide you with an exact identification. I’m reasonably certain that it is a species of blue grass. I can’t say whether it is annual or perennial. To do so would necessitate a microscopic examination.

2). For purposes of treatment, it is important to know precisely the type of grass with which you are dealing. Without this information, time and money for eradication could be wasted by going up a wrong road.

3). There is a fantastic turf diagnostic laboratory at the University of Wisconsin. Not only could they make a definitive identification of the type of grass you have, but they could also provide you information on how to eliminate it. They have a very short turn around time. It would be worth your time to provide them samples of this grass for analysis. Contact them beforehand as to how you should submit samples. Also specify to them that you need an identification of the grass and elimination procedures. There will be a nominal charge for their services. In the long run, this will provide you with the best information and way to get rid of it. See:

https://tdl.wisc.edu/

Good luck. Thanks for consulting with us.