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Sean from St. Louis, Mo writes

Is MSM safe to use on tall fescue lawn?


Per the MSM Turf Herbicide product label on Fescue: This product may temporarily stunt tall fescue, cause it to turn yellow, or cause seedhead suppression.  

To minimize these symptoms, take the following precautions:

• Do not use more than 4/10 ounce of MSM Turf Herbicide per acre • Use a tank mix with 2,4-D

• Use the lowest specified rate for the target weeds

• Use a non-ionic surfactant at 1/2 to 1 pint per 100 gallons of spray solution

• Make application later in the spring after the new growth is 5 to 6 inches tall, or in the fall

• Do not use a surfactant if liquid nitrogen is used as a carrier

• Do not use a spray adjuvant unless it is a non-ionic surfactant

Answer last updated on: 01/07/2020

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