Ortho WeedClear Lawn Weed Killer Base Trigger, 1 GAL, Ready to Use Weed Killer. Kills 250 + weeds. Won't harm the lawn, guaranteed. When used as directed. Results in hours. Works on Southern and Northern lawns.Active ingredients:Dimethylamine Salt of 2,4-D Acid 0.605%, Dimethylamine Salt of Mecoprop-p Acid 0.149%, Dimcamba Acid 0.026