Spectracide® One-Shot™ weed and grass killer ready-to-use spray works fast to kill unwanted weeds and grass. This powerful formula kills from the leaves to the roots and prevents regrowth for up to five months. Plus, it works quickly, with visible results same day. Clear out unwanted vegetation on walkways, driveways and patios. Avoid spraying this product onto desirable plants, lawn grasses, shrubs or trees. Spectracide® One-Shot™ weed and grass killer's formula gives you control over weeds and grass, roots and all.