· Scotts Turf Builder Halts Crabgrass Preventer with Lawn Food stops crabgrass before it invades and feeds grass for a fast green-up after winter· Prevents listed weeds including crabgrass, barnyard grass, foxtail, poa annua, chickweed, and oxalis· Apply pre-emergent weed killer plus fertilizer to a dry lawn in early spring (prior to 3rd or 4th mowing) before temperatures are regularly in the 80s· Rain, snow, or freezing conditions after application will not affect product performance· One 37.38 lb. bag of Scotts Turf Builder Halts Crabgrass Preventer with Lawn Food covers 14,000 sq. ft.