Weed treated with Celsius and now I need some grass to grow. Thoughts? Updated

Lespedeza?

I’d imagine something like Celsius, image, MSM would knock it down.

As Jimbeam said, it does look like lespedeza. From the LSU AgCenter

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Common lespedeza — low growing, mat forming summer annual legume. Stems becoming woody as plant matures. Very difficult to control. Early to mid-summer applications are more effective than fall applications. Control options: repeated apps of metsulfuron (MSM Turf, Mansion) or Celsius (St. Augustinegrass, centi-pedegrass, bermudagrass, zoysiagrass)

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Also, I would not fertilize again in a couple weeks. Centipede requires minimal fertilization, much less than St Aug or Bermudagrass and you just added fertilizer a month ago.

You can consider fertilizing again in late July/early August. And if so, just use lawn fertilizer, not weed and feed. Apply 0.5 pound nitrogen per 1,000 ft2 of lawn. Just divided the %N on the lawn fertilizer you purchase into 50 for your application rate. For example if you used a 15-0-15 centipede fertilizer apply 3 1/3 pounds of the fertilizer per 1000 sq ft (50 divided by 15 = 3.33).

Recommend going forward, you keep lawn fertilization and weed control as 2 separate lawn management activities. Long way of suggesting to you to reconsider using Weed & Weed products on your lawn.

ETA: Yes, just spray the affected areas, no need to spray the entire lawn if you are seeing the weeds in patches

Applied Celsius 5 days ago. Doing work

What should I do to get the grass to fill in? Water a lot, seed, another round of fertilizer?

Have more of that weed growing than I thought.

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Trimec Southern (3 way mix) does well on it too

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Think I’m done with 3 way mixes, at least in the ready to spray form. Bought a premix that is supposed to cover 8,000 sq, I was spraying my front yard and not thinking anything of it, as I had used ready to spray before with good results. Apparently the valve was fricked up and it sprayed 80% of the bottle on 2000 square feet. Got some really ugly spots that I’m hoping don’t die completely. I’m used to the temporary damage they sometimes do, but this is the worst I’ve seen it