This fertilizer prevents dandelion and crabgrass for up to 6 weeks while promoting grass growth. It effectively stops various weeds, including clover and chickweed, without harming new grass. Suitable for Kentucky Bluegrass, Tall Fescue, and more, it covers 1,000 sq. ft. The price drops from $20.49 to $14.34. Shipping is free for prime members or on orders over $35.