Rimsulfuron 25DF is not labeled to be used on St Augustine grass specifically, only warm-season turf such as Bermudagrass, zoysia, and centipede. We would not recommend using this product on St Augustine grass. You could test a small area first for tolerance, but we cannot guarantee that it would n…
Read Full Answer »Certainty Herbicide is a great option for a warm season turf like Bermuda to remove poa annua and other broadleaf weeds. We would recommend putting down a split application of a pre emergent like Pendulum 2G this fall to help prevent the poa annua from coming up next spring. To learn about split ap…
Read Full Answer »We recommend contacting the manufacturer of Rimsulfuron 25DFÂ Quali-Pro directly with specific product questions by calling 800-242-5562, or via their website's contact page here.