Preen 18 lb. One Lawncare bag. 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.