Ortho® Groundclear® Poison Ivy & Tough Brush KillerTake out tough weeds with Ortho GroundClear Poison Ivy & Tough Brush Killer1. This weed killer concentrate controls over 60 listed tough weeds and brush right down to the root, including poison ivy, poison oak, kudzu, wild blackberry, honeysuckle, elderberry, wild rose, and other listed weeds. Use this herbicide in non garden areas around homes, cabins, buildings, fences, and trails. Apply when weeds are leafed out and actively growing. Wilting or