Kills lawn weeds PLUS Crabgrass without harming the lawn (when used as directed, not for use on St. Augustinegrass including Floratam variety, Bahiagrass, Carpetgrass, Centipedegrass or Dichondra). Kills over 200 of the most common broadleaf weeds, such as Dandelions and Clover. PLUS controls grassy weeds like Crabgrass. Won’t harm lawns when applied as directed. If the lawn is dry, water one to two days before using this product. Rainproof in 1 hour. Rain or watering one hour after application will not wash away effectiveness. Lawn can be mowed one to two days after spraying.