Effective on over 200 hard to kill weeds, right to the roots. Won't harm lawn grass when used as directed. The product performs well in both warm and cool weather. Kills grassy and broadleaf weeds like crabgrass, clover, chickweed, oxalis, dollar weed, spurge, foxtail and over 200 others. Not recommended for St. Augustine or Centipede grass type turf. Combines Quinclorac, 2,4-D and Dicamba for complete post emergent weed control.