Poa Constrictor Herbicide is formulated to provide selective control of tough and hard-to-kill annual grasses and broadleaf weeds. It has an added suppression on tough-to-control weeds. A reliable choice for application on ornamental turf areas, including but not limited to sod farms, cemeteries, parks, residential lawns, and commercial lawns. This formulation is most effective on annual bluegrass (poa annual), black nightshade, barnyardgrass, chickweed, crabgrass, pigweed, lambsquarters, and purslane.