Mixed as instructed. Applied to the massive invasion of Dollar Weed that covered my yard with a pump sprayer. I am in central Florida and temperatures have been around 80-85 degrees. It's been 2 weeks and the weeds are dying nicely. I am very impressed.

This product is very effective against Virginia Buttonweed (assuming the directions are followed and the second application is made), and is safe to use on Zoysia (again assuming label directions are followed). The active ingredient of this product (metsulfuron methyl) is the same as the herbicide formerly sold under the trade name “Manor”. Metsulfuron is one of only two selective herbicide chemical groups actually shown to be effective against Virginia Buttonweed, and MSM is the only one of these chemicals I have found that is sold in volumes economical for residential use. In fact at my local farmer's co-op, even the container of MSM I found was 3 times the cost of what I paid online and would have been enough chemical to treat my yard for over a decade (far past the shelf life of the chemical in an opened container). In my experience, Zoysia is quite tolerant of this herbicide at the recommended rates as long as ambient temperatures are under 85F. The best strategy is to make the initial broadcast application in mid spring (early to mid-May in TN) before sustained temperatures reach 85, and while Buttonweed is still in its more vulnerable stages. Spot spraying during summer also doesn't seem to harm the turf grass. Some stunting of Zoysia will occur if you broadcast spray during hot weather, but it is short lived and the turf seems to rebound quickly. It took me basically 2 years to rid my yard of a pretty heavy Buttonweed infestation by using the split application method of initial broadcast spray in May, followed up with a sequential application 6 weeks later. Since then, most years I don't have to spray for Buttonweed at all, and when I have it has only been light spot spraying in early summer. Also, it may not be completely clear from the description, but this product is in dry form, so “oz.” refers to the unit of weight, not fluid ounces. I was initially concerned when I read the chemical data sheet prior to purchase that this product would be impossible to mix up in lawn sprayer sizes (before I realized that it was not referring to a fluid ounce), but the product is not too terribly difficult to mix for a residential scale application with the volumetric dosage cup that is included.