Tall fescue shouldn't spread, it should clump or bunch. By Kentucky Bluegrass mixture do you mean several different cultivars of Kentucky Bluegrass, or Kentucky Bluegrass mixed with other desireable (thin-bladed) lawngrasses? Assuming you've got KY31 and not some broadleaf weed that can't be eliminated with a selective herbicide, I'd hit all the KY31 with Roundup and reseed (or sod) the areas killed by the Roundup in about three weeks with a blend of quality KBG cultivars or a mixture that approximates the thin-bladed grasses you have now. We're approaching the best time of year for seeding. You *could* dig the KY31 out, but that sounds like more work than killing it with Roundup. So yes, dig up (or Roundup) *and* overseed a new mixture (or blend). I'm assuming the affected areas are large enough the existing KBG won't have time to spread and fill in the bare soil in one season. If you leave the soil bare you'll have weed problems next spring. I know what you mean about the unkempt look of KY31 growing in the midst of bluegrass. The blades are lighter green than bluegrass, much wider, and grow twice as fast so you have these unsightly things sticking up out of your uniform stand of lawngrass about two days after mowing and it just gets worse the longer you wait to mow again.

So this week 22 aug. i have been watering the lawn everyday. I plan on applying first application of weed grass killer on the following monday 29 aug and then watering again for a week and applying another application of weed grass killer. Hopefully then everything will be dead and i will have my soil sample back. Plan to scalp the yard dethatch and aereate then seed the tall fescue applying a starter fertilizer and covering with straw. Does this sound ok or does anyone see any possible issues or things i should or should not do that i did not mention. Any help is appreciated

Its Tall fescue, and it would actually make a nice lawn if it was re-seeded with more tttf..... Its kind of "hit and miss" with seed from big box stores. Stay away from Scotts, Vigoro, Pennington and Lowe's brand -(Sta-green) Most products by Barenbrug are pretty good - including their tttf blend- 'Water Saver'........which is available at some retail outlets. Barenbrug does sell some cheap , common type grasses, but its obvious and out front. The other brands mentioned - hide sub par types in their blends , and you can't tell until the lawn is established , and you start noticing weedy off type grasses in your lawn.

I don’t know about those specific samples you pulled out but there is definitely a bluegrass in your mix. I know a lot of TTTF mixes include some Kentucky bluegrass to knit things together between the tall fescue, which is a bunch-type grass and looks clumpy when it thins out. The KBG keeps it looking more uniform. I’m in the PNW, where KBG doesn’t do well, but I do have annual and rough stalk bluegrass, as well as creeping bentgrass in my originally TTTF lawn. I don’t really see any of those in your pictures.