Preen 18 lb. One Lawncare. Covers 5,000 sq. ft. Easy one-step application for spring lawn care. Stops Crabgrass all season & can be applied up to 4 weeks after Crabgrass emerges. Kills dandelions & up to 250 other tough lawn weeds (as listed) to the root. Feeds your lawn for up to 8 weeks with a zero-phosphorus 24-0-6 formula. Do not use this product on St Sugustinegrass, Colonial Bentgrass, Dichondra or Carpet Grass as serious lawn injury will result. For use on established bahiagrass, bermudagrass, buffalograss, fine fescues, Kentucky bluegrass, perennial ryegrass, tall fescue and zoysiagrass.