For weed control in your lawn, use Weed B Gon For St. Augustine. We have a new formulation that is safe to use on Floratam St. Augustine Grass. Treats up to 2500 sq. ft. and comes in a ready to spray hose-end bottle. Image will kill some broadleaf weeds (dollarweed) as well as a few grassy weeds (grassburrs) without hurting your St. Augustine. Another new product we have is Topshot. It also kills all broadleaf weeds in the lawn and comes in a package with 2 ampules which cover 5000 sq. ft. Simply add 1 ampule with water in either a pump sprayer or Dial n Spray to cover 2500 sq. ft.. For best results apply weed killers when weather is warm (not hot) and sunny for 3-4 days. Do not use in flowerbeds for weed control (except Image), only as a lawn application.