This new Triple Action Formula allows you to apply a pre-emergent control and seed at the same time. Active ingredient is Mesotrione which is the same active used in Step 1 for Seeding. Scott's has an exclusive on using Mesotrione with a fertilizer. Feeds to jumpstart grass development so grass grows thicker and quicker. Premium technology of Mesotrione prevents tough weeds like crabgrass and dandelions. Pairs perfectly with Turf Builder Grass Seed.