Build a thick, healthy, green lawn and stop pesky dandelion and large crabgrass weeds before they start with Scotts® Turf Builder® Weed & Feed. This natural, pre-emergent weed seed inhibitor contains 100% corn gluten meal to help keep annoying weeds from taking root. For best results, apply before weeds appear, usually in early Spring and again in late Summer or early fall. Ideal for established perennial ryegrass and Kentucky bluegrass lawns. Not for use on newly seeded lawns or when over-seeding or re-sodding. • Contains 100% corn gluten meal, a natural weed seed preventer • Helps inhibit germination of dandelions and large crabgrass weed seeds • Best for established lawns with mostly perennial ryegrass and Kentucky bluegrass • Use 2x a year, in early Spring and late Summer/early Fall after heat stress has passed