Dollar weed .... how to kill it?

Dude my dollarweed will not die either. It'll disappear after a treatment and comes back meaner than ever. I've almost given up.

The only lawn weed I haven't been able to get rid of completely. I think it's because my neighbor has a goat ranch looking front yard and it contaminates my property.

Try MSM Turf (metsulfuron methyl), 1/8 teaspoon (0.5 grams) per gallon of water with 2 teaspoons of spreader/sticker (surfactant). About $25 for a 2 oz bottle and that bottle should last 3 or 4 years. Give a few weeks to work, with follow up sprays as needed.

I have a little dollarweed in low spots but I don’t have an issue keeping it controlled/in check with MSM.

Go to Site One and get one jar of Celsius and a gallon of the surfactant. Mix one teaspoon of the Celsius to a gallon of water, and add 1 oz of the surfactant. Shake it up, and absolutely douse the dollarweed. Check on it in about 3-4 weeks, repeat. It should be turning yellow by that point. Make sure we don't have any rain within 3 or so days after you treat it. You may have to hit it another 2-3 times to get it.

That's what worked for me. Expect to have some bare spots in your yard where the dollarweed once was. You could just go buy some seed and some topsoil and get the grass to catch there, or just fertilize it.

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24d

Penoxsulam herbicide. A Ferti-lome granular product called “Dollarweed killer” at local nurseries.
It’s also in Bio-Advanced weed and feed granules at Lowe’s. If you want to fertilize your grass at the same time.
All okay with St. Augustine grass