I'm in Eastern NC and last year's drought caused a lot of dead areas in my lawn. This spring every weed in NC started to pop up. It was(is) a sight to make a grown man cry so I found a very good landscaping Co nearby and they said it was beyond repair. So today the entire lawn was sprayed with industrial weed killer and in 3 or 4 days they will remove all the old grass & weeds and re-sod with Centipede and by Fri I'll have a new lawn and large water bills. I do not know the secret to eliminating weeds but I bought a stand up weed puller(Grand Daddies) and it works well with no bending over. They say Centipede is drought tolerant but I found that in extreme conditions is does need a lot of water.

That might be the most perfect poster picture ever of one kind of bermuda invading the other kind. What you have is Tif 419. What the invader looks like is all the other bermuda - common bermuda. It looks like someone seeded the common into the Tif. The only way to get rid of the invader, if it is bermuda, is to kill the entire lawn. Does the invader get flowers on it a few days after mowing? Can you let the grass grow until it flowers and post a picture of the flowers? That will help to identify it. I don't think you can hurt bermuda with a weed n feed product. You wasted the herbicide, though, by not following directions. Don't feel bad. 99.999999999999999999% of everyone makes that mistake. Seriously. All the lawn forums tell people to just forget about weed n feed products because they won't work for most anyone. You don't get any herbicide and you don't get any fertilizer out of it. And besides, the weed you have would not be touched by the herbicide in a weed n feed. Those are more for clover, dichondra, oxalis, and other broadleaf weeds. In the future if you want to fertilize, use a fertilizer. If you want to kill weeds, use a herbicide. Don't mix the two and expect to get good results. Find the Bermuda Bible online and memorize it. This time of year you should be watering once per month unless you are catching up from a loooong dry spell like we are in Texas. I let mine go too long and am watering pretty deeply to get some moisture in the soil. Where do you live?

Are you planning to spray the whole yard with atrazine, or just spot spray? I would spot spray each & every suspected Crabgrass head, but I would not broadcast a spray across the entire yard--That's a bit wasteful & atrazine is tough stuff. It's really not too late on the preM this year, all this rain & cool weather has kept them behind schedule in my yard. The atrazine should be used in combination with a good preM to keep the heads from coming back anyway. I use dimension & it actually kills baby Crabgrass up to a single tiller, so it can be applied later than the others on the market. Late app plus late growth means you're not too late for preM & it will make a world of difference. I also recommend a product called bonide Sedge ender, which targets Crabgrass & nutsedge specifically, including a preM already mixed in. Ace has both these products, but the big box stores usually only carry fast acting stuff to keep you coming back.

Okay I'm in San Antonio and moving to Bandera. Hold off on the fertilizer unless you want to use an organic like alfalfa pellets or corn meal. If you've never seen those flowers then you don't have buffalo. Can you take a picture on a cloudy day from a height of about 3 inches. If the grass has flowers or tassels or anything on it, that would help. You have not used the really hard stuff, but then you did use 7x too much, so I'd let things rest for a couple weeks. Today's herbicides often don't show progress for at least a week. If you have St Augustine, for example, 2,4-D will kill it. Applying anything at 7x the rate would probably wipe out St Aug. St Aug is a very hardy grass, but one weakness is sensitivity to most herbicides. It's weird. Let's figure out what grass you have before going crazy with treating it. If you water the fertilizer in immediately after applying, it should not hurt a normal grass. The problem comes if you don't water it and then the morning dew creates a very salty solution that will kill most grass (but not usually St Augustine - weird). If you have a hand sprayer of Weed b Gon, you could spray those dandelion looking weeds. Just spray the leaves - don't drench the soil. They might be thistle, which looks very similar before it flowers. As for fertilizing the lawn, I'd just enjoy the bluebonnets for a couple more weeks.