This lawn fertilizer is a three-in-one formula that kills weeds, prevents crabgrass, and feeds grass. It effectively controls weeds like dandelion and clover while preventing crabgrass for 4 months. Suitable for various grass types, it treats up to 4,000 sq. ft. The price drops from $41.49 to $24.97. Shipping is free for Prime members or on orders over $35.