Ortho WeedClear Lawn Weed Killer Base Ready to Spray, 32 oz, 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 8.658%, Dimethylamine Salt of Mecoprop-p Acid 2.127%, Dimcamba Acid 0.371