Scotts STEP 1 for Seeding Starter lawn food with weed preventer not only has the strength to prevent pesky weeds, but also helps grow a newly seeded/over seeded lawn. This product will prevent the toughest lawn weeds including large crabgrass, smooth crabgrass, dandelion, common chickweed, ground ivy, yellow nutsedge and more. Scotts STEP 1 for Seeding Starter lawn food with weed preventer is for use on Kentucky bluegrass, tall fescue, perennial ryegrass, centipedegrass as well as fine fescues.