How Do Roundup Weed & Grass Killer Products Work?

Our Roundup® Weed & Grass Killer products are formulated with active ingredients and precision sprayers to help you protect your landscape from invading weeds.

This product is formulated with three active ingredients for broad spectrum control of weeds and grasses. Two ingredients, fluazifop-P-butyl and triclopyr, are absorbed by the leaves of grasses or weeds and move within the plant down to the roots. Weeds die, down to the root—so they don’t grow back. The third ingredient, diquat, works on contact to provide visible results within hours.

Roundup® Weed & Grass Killer products help you triumph over the toughest weeds. Do not spray plants or grasses you like—they will die. Not recommended for spot weed control in lawns since this product kills lawn grasses. Do not allow treated weeds to come in contact with desirable plants until the spray has dried.

Roundup® Weed & Grass Killer4 Ready-To-Use with Sure Shot® Wand lets you focus the spray where you want it to go. The protective dome fits over weeds to help contain spray, even in windy conditions, and helps target the spray on the weed.

Our residual products, like Roundup® Dual Action Weed & Grass Killer Plus 4 Month Preventer and Roundup® Dual Action 365 Weed & Grass Killer Plus 12 Month Preventer, also feature the active ingredient imazapic. Imazapic prevents new weeds from growing for up to 1 year by creating an invisible barrier in the soil.

Roundup® Weed & Grass Killer Products are effective and work fast. Once applied to your weeds, our exclusive formulas are rainproof in as fast as 30 minutes and give you visible results in as fast as 6 hours.

ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. Not all products are registered for use in all states and may be subject to use restrictions. Roundup® Dual Action 365 Products are not registered for sale or use in New York.