Start the spring season off right with Scotts Turf Builder Halts Crabgrass Preventer with Lawn Food. This pre-emergent weed killer plus fertilizer stops crabgrass before it invades and protects all season long. It also prevents other listed grassy and broadleaf weeds, including barnyard grass, foxtail, poa annua, chickweed, and oxalis. The added fertilizer feeds for a fast green-up after winter and helps build strong, deep grass roots. It's a great pre-emergent crabgrass killer for lawns that homeowners can use during their yard maintenance. Apply Scotts Turf Builder Halts Crabgrass Preventer with Lawn Food in early spring (prior to 3rd or 4th mowing) when your lawn is dry and before temperatures are regularly in the 80s. For best results, the lawn should receive ¼ to ½ inch of water from rainfall or watering within 2-3 days after application. We recommend using a Scotts fertilizer spreader to apply this product. For Scotts broadcast/rotary spreaders, use a setting of 3. For Scotts drop spreaders, use a setting of 6. Do NOT apply to Dichondra and Bentgrass. This pre-emergent control product controls crabgrass in its early stages of growth. It does not control mature crabgrass and other existing weeds. One 37.38 lb. bag of Scotts Turf Builder Halts Crabgrass Preventer with Lawn Food covers 14,000 sq. ft.