Protect your lawn from weeds and insects with the Northern Lawn 4-Bag bundle for Large Lawns. Start by applying Scotts Turf Builder Halts Crabgrass Preventer with Lawn Food in the early spring. This pre-emergent weed killer prevents weeds such as crabgrass, barnyard grass, poa annua, and chickweed. Also, the added fertilizer feeds for a fast green-up after winter. In mid to late spring, apply Scotts Turf Builder Weed & Feed5 to wet grass when temperatures are consistently between 60° and 90°F. This weed killer plus fertilizer kills existing listed weeds and feeds to thicken grass to crowd out future weeds. In the summer, apply Scotts Turf Builder SummerGuard Lawn Food with Insect Control to kill and protect against listed bugs, while feeding and strengthening your lawn against heat and drought. The included insecticide controls listed lawn pests like ants, armyworms, chinch bugs, crickets, fleas, grasshoppers, spiders, and ticks. Lastly, in the fall, apply Scotts Turf Builder WinterGuard Fall Weed & Feed3, will kill listed weeds and deliver nutrients to help your lawn recover from summertime damage and build strong roots for winter.