BCF 25-0-5 with 1.15% Atrazine fertilizer is a specialized "weed and feed" product for St. Augustine and Centipede lawns, providing nutrients (25% Nitrogen, 0% Phosphorus, 5% Potassium) while the Atrazine herbicide controls pre-emergent and post-emergent grassy and broadleaf weeds like crabgrass, clover, dollarweed, and Florida pusley. It's designed for warm-season turf, preventing new weeds from sprouting and killing existing ones, requiring watering after application for activation.