According to the University of Florida Extension, for established turfgrass, use a weed-and-feed product that contains oryzalin (Surflan), benefin (Balan) or pendimethalin (Pendulum, Pre-M) to control annual grass and some broadleaf weeds. Using a product that contains oxadiazon (Ronstar), bunsulide (Betasan, Pre-San) or dithiopyr (Dimension) will also provide preemergence annual grass and broadleaf control. Apply the product in the winter before the weeds emerge.
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Aileen Clarkson has been an award-winning editor and reporter for more than 20 years, earning three awards from the Society of Professional Journalists. She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." Clarkson earned a Bachelor of Arts in journalism from the University of Florida.