Superior broadleaf weed control that provides better efficacy on more than 100 of the toughest weeds. Grazonnext hl specialty herbicide 2 gallons excellent pre and postemergence control of many species. Together, this dual chemistry controls nearly all problem annual and perennial broadleaf weeds, including Canada thistle, biennial thistles such as musk and plumeless thistles, horsenettle and ironweed.