Kills weed not lawns. Apply with either a watering can with a fine rose or a garden sprayer. Apply evenly over the area to be treated and wash out the sprayer or watering can thoroughly after use. After treatment leave the clippings from the first mowing on the lawn. The next three mowings should be composted well for at least 9 months before being used at mulch. Use pesticides safely and always read the label.