Convenient lawn fertilizer and weed killer in one product. Apply in early spring to obtain control of pre-emerged and post-emerged weeds in Centipede, Zoysia, and St. Augustine lawns. For best results, lawn should be moist prior to application. After application, water well. Do not use on Bermuda Grass or any type of Northern grasses. Formulation: 15-0-4. Active ingredient: Atrazine.