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Learning the Basics

Learn how Roundup® Weed & Grass Killer products work, how to use them safely, which weeds they work on, and where to use them.

  • Learning the Basics
  • Using Roundup® Weed & Grass Killer Products Properly
  • Specific Weeds
  • Learning the Basics
  • Using Products Properly
  • Specific Weeds
  • General Weeding
  • Landscape Projects
Roundup® Landscape Weed Preventer sitting on a garden bed.
What does Roundup® Landscape Weed Preventer Prevent?

If you’re ready to stop pulling weeds and start preventing them, Roundup® Landscape Weed Preventer puts a stop to over 40 types of grassy and broadleaf weeds.

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Large house with driveway and a green lawn.
Choosing The Right Roundup® Weed & Grass Killer Product

For every challenge, there's a Roundup® Weed & Grass Killer product made to meet your needs.

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Roundup® Weed & Grass Killer Products Control over 200 species of weeds.
What Do Roundup® Weed & Grass Killer Products Control?

We know of over 200 types of weeds and grasses that our products can help you handle.

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Man spraying weed killer on weeds in a garden.
How Do I Prevent Weeds From Coming Back?
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Lawn with a wheelbarrow on it by a large house.
Where Can I Use Roundup® Weed & Grass Killer Products?

Roundup® Weed & Grass Killer products work wonders in many of your outdoor areas. Whether it’s your patio, walkway, garden bed, or around trees, they’ll stop the weeds — guaranteed. Some of our products can even be used for larger projects like garden prepping or lawn renovation. Just remember, you shouldn’t treat any plants you want to keep, as these products stop any growing plant dead in its tracks.

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Man using Roundup® Landscape Weed Preventer for a garden.
How does Roundup® Landscape Weed Preventer Work?

Every square inch of soil in your landscape beds contains weed seeds. Fortunately, Roundup® Landscape Weed Preventer is on your side. Here’s how it works.

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Fence built on dirt.
How Do Roundup® Weed & Grass Killer Products Work?

We reveal the technology behind our products’ weed-killing success.

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Man using Roundup Ready-to-Use Weed & Grass Killer III with Sure Shot® Wand in his garden
What’s in Roundup® Ready-to-Use Weed & Grass Killer?

The ingredients explained.

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The information on this site refers to Roundup® Weed & Grass Killer products and is for homeowner use. Always read and follow label directions.

*Consumer Guarantee: If for any reason you are not satisfied after using this product, simply send us original proof of purchase, and we will refund the purchase price.

Always read and follow label directions. Roundup, Roundup & design, FastAct, Roundup Extended Control and X design, Roundup® Precision Gel™, Pump 'N Go, Sure Shot and Draw the Line are trademarks of Monsanto Technology LLC. © 2021 Monsanto Company, worldwide rights reserved.