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Chris from South Louisiana writes

Can MSM Turf be mixed with Roundup to kill Bahia?

Hi, would it be advisable to mix roundup and MSM in a 110 gallon tank in order to kill a very well established and thick pasture of bahia that was planted? If so, what would be the proper mixture? I do have oak trees in the vicinity. I can avoid spraying around them, but I am concerned about the MSM leaching and reaching the root systems. I've read/seen several articles attributing tree kills, specifically oaks, to MSM. If it is too risky, I will just spray roundup unless you can suggest something more effective. I also have some woody plants growing in the bahia, it has not been cut/baled in 2 years. I plan to spray it in order to eradicate it and then cut with a flail mower afterwards. Thank you for any input.


You can mix MSM Turf Herbicide with a non-selective herbicide such as RoundUp if you are not planning to replant the area right away. Otherwise, we suggest using only the Roundup so that you do not have to worry about residuals interfering with your replanting. There is a danger if using MSM around oak trees, so you want to be sure that you do not use MSM under any oak tree canopies: be sure to stay outside the drip line of these trees and do not spray if there is wind or other risk of drift to oak trees. You can use MSM Turf Herbicide at a rate of 0.25 – 0.75 oz per Acre to control bahiagrass. Keep in mind that MSM can have a long soil residual, so you should not apply this near desirable ornamental plants or where you intend to plant new trees or shrubs within 1 year and new bedding plants within 2 years. Please refer to the product label for complete application instructions.

Answer last updated on: 11/05/2019

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