Scotts Turf Builder Triple Action provides three benefits in one bag. This 3-in-1 formula kills and prevents weeds, all while feeding and strengthening your lawn. It kills broadleaf weeds, including dandelions and clover and prevents crabgrass for up to 4 months. It also prevents other listed grassy weeds, including barnyardgrass, fall panicum, foxtail and annual bluegrass. Scotts Turf Builder Triple Action can be applied to Kentucky Bluegrass, Perennial Ryegrass, Tall Fescue, Fine Fescue, Bermudagrass, Bahiagrass, Centipedegrass and Zoysiagrass. Apply with a Scotts spreader when dandelions are actively growing. Make sure the grass is wet from dew or watering before applying to help the particles adhere to weed leaves. After 24 hours, water the lawn to wash particles into the soil to prevent germination of crabgrass and other listed grassy weeds. Do not allow people and pets to re-enter the treated area until dusts have settled. A 20 lb. bag treats 4,000 sq. ft.