0.37% Prodiamine Professional Pre-Emergent is a professional-grade herbicide designed to prevent annual grassy weeds before they germinate. The granular formulation delivers long-lasting control of problem weeds such as crabgrass, goosegrass, and annual bluegrass in established turfgrass. Prodiamine works below the soil surface to stop weed development early, helping lawns and managed turf maintain a clean, uniform appearance throughout the growing season.