Spectracide One-Shot Weed and Grass Killer2 with Accushot Sprayer 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. Just aim and spray with the Accushot Sprayer. This extendable sprayer gives you precise control and a continuous spray. For best results apply during warm, sunny weather when weeds are actively growing and temperatures are above 60 degrees Fahrenheit. This formula is rain safe within 1 hour. Pets and people may re-enter treated area once sprays have dried.