Trimec® Southern Broadleaf Herbicide for Sensitive GrassesControls 90+ broadleaf weeds in southern grasses What it is Trimec Southern Broadleaf Herbicide for Sensitive Southern Grasses is formulated to minimize risk to sensitive warm season grasses and maintain the quality performance you expect from a Trimec complex. Trimec Southern provides dependable control of more than 90 broadleaf weeds, including dandelion, clover, and spurge. And Trimec Southern provides exceptional control of clover and chickweed.