re: Virginia Buttonweed

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Is MSM Turf okay to use this time of year and for spot treatment through the summer?

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Yes it is even though the label will state not to use above 85 F. Expect a little temporary yellowing of desirable turf but it will recover. Use a 1/8 teaspoon per gallon + 2 teaspoons of surfactant.

Though an excellent herbicide for VBW and other broadleaf weeds, It’s dangerous to turf grass using Weed-Free-Zone at temps above 85 F - it’s better reserved for use in spring and fall at cooler temps.