Monterey, Remuda, QT, Extended Weed Control, Pre-Emergent & Post-Emergent Full Season Weed Control, With 1 Application, For Use In Driveways, Sidewalks, Patios, Gravel Areas, Rock Gardens, Around Established Trees & Shrubs, Etc, 1 Active Ingredient Controls Existing Weeds & The Other Goes Into The Soil To Prevent Weeds That Have Not Yet Emerged.