roundup grass killer

Roundup grass killers are typically offered as ready-to-use (RTU) spray products and as concentrated liquids that you mix with water.

They’re intended for hardscapes and landscape areas such as cracks and crevices in driveways, sidewalks and patios; along fences; gravel areas; mulch beds; and around the base of well-established plants, trees, and shrubs.

Label recommendations vary by formula. Some products advise applying in warm, sunny weather above 60°F, while a lawn-specific product recommends use in spring or fall when daytime temperatures are between 45°F and 90°F and weeds are actively growing. Always follow the instructions on the label for the product you’re using.

Timing varies by formula. Many products state they become rainproof in as fast as 30 minutes and can show visible results within hours; some lawn-specific options indicate rainproof in about 3 hours, with visible action that may begin immediately. Refer to the product label for the precise timing.

Products are offered with spray wands and one-handed applicators, including comfort-style continuous-spray wands, wand shields, battery-powered one-handed sprayers, and refill bottles or refill systems compatible with those applicators.

Mix the concentrate according to the product label. Guidance indicates treating evenly so that each gallon of mixed spray solution covers about 300 sq ft. As an example, a 32 fl. oz. concentrate bottle is listed as making up to 5.3 gallons of spray solution—covering up to about 1,600 sq ft when mixed per the label instructions.

Replanting guidance varies by formula. Some labels recommend waiting about 4 months before planting ornamentals, trees, shrubs, sod or seed; other formulations note planting may be allowed within 1 to 30 days. Check the specific product label for exact replanting directions.