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Roundup® Weed Barrier Granules



  • Create a weed barrier around your plants with Roundup® Weed Barrier Granules
  • Prevents weeds and grasses for up to 8 months (see use directions for complete list of treated weeds)
  • Easy to apply - just sprinkle directly to the soil around listed ornamental landscape plants
  • Won't harm desirable plants, such as annuals, flowers & bulbs, and established trees & shrubs
  • Covers up to 1,000 square feet

Specs and Details

Active Ingredients

  • 1.71% Pendimethalin


  • Make sure newly planted areas have been watered and soil is packed around roots of desirable plants before applying this product.
  • Keep product off of plant leaves. If product is applied to the plant leaves, rinse the leaves with water.
  • Avoid unintentional contact of granules with stone, wood, or other porous surfaces as staining may occur. Sweep immediately to avoid staining. If granules are crushed into surface, rinse thoroughly.
  • Unusually cold, excessively wet, or hot and dry conditions that delay germination or extend germination over a long period of time can reduce weed control.
  • To prevent possible staining to unintended surfaces (concrete, stone walks, vinyl surfaces, etc.), sweep up stray granules as soon as possible.
  • Not for use on edible fruit, vegetables or herb areas.

Disposal Methods

  • Store in a dry place for your next application. Product can be used until container is empty.
  • Nonrefillable container. Do not reuse or refill this container.

  • If empty: Place in trash or offer for recycling if available.

  • If partly filled: Call your local solid waste agency for disposal instructions. Never place unused product down any indoor or outdoor drain.

Product Label

  • This is not the product label. Always read and follow the product label before use.
  • Download Label
  • Safety Data Sheets can be found at scottsmsds.com


Don't pull weeds and grasses, prevent them! Introducing Roundup® Weed Barrier Granules, a granular weed and grass preventer that won't harm your plants, when used as directed. Roundup® Weed Barrier Granules can be applied around established trees, shrubs, perennials, ground covers, ornamental grass, bulbs, and bedding plants. Want to know the best part? The product creates a weed barrier that lasts up to 8 months (see directions for treated weeds)! Applying Roundup® Weed Barrier Granules couldn't be any easier. Simply sprinkle the product around your plants at rate of 3⁄4 oz. (2 Tbsp) per 10 sq. ft., rake it into the top inch of soil, then activate it by lightly watering-in. To make the application process even more seamless, Roundup® Weed Barrier Granules features a built-in applicator that provides even coverage. For best results, the product should be applied in the spring and before mulching. Outsmart weeds before they appear with Roundup® Weed Barrier Granules.

Step by Step Instructions

How to Use

  • Sprinkle around plants at a rate of 3/4 oz. (2 Tbsp) per 10 sq. ft.
  • Activate product by lightly watering-in.
  • This product may be raked into the top inch of soil before watering.

When and Where to Use

Where Not to Use

  • This product is not for use on lawns or vegetable gardens.
  • Do not use when planting seeds. Do not use on lawns.
  • Do not treat plants grown for food or feed.
  • Not for use on plants being grown for sale or other commercial use as sod, or for commercial seed production, or for research purposes.

Where to Use

  • For use around established trees, shrubs, perennials, ground covers, ornamental grass, bulbs, and bedding plants.

When to Apply

Established* Trees, Shrubs, Perennials, Ground Covers, Ornamental Grass, Bulbs

  • Apply to soil around plants in Spring before weeds germinate and before mulching.
  • Wash granules from plants and activate product by lightly watering-in.
  • Apply once every 12 months.

Bedding Plants

  • Apply after planting and watering the area to pack soil around roots.
  • Make sure newly planted area has been watered and soil is packed around roots before applying this product.
  • Wash granules from plants and activate product by lightly watering-in.
  • Apply once every 12 months.

*Established plants are those that have been planted for more than 2 weeks.

How Often to Apply

  • Apply once every 12 months.

Special Instructions

Watering Tips

  • After application, wash granules from plants and activate product by lightly watering-in.

Using with other Products

  • This product prevents weeds from germinating. It does not kill existing weeds. For best results with existing weeds in your garden and landscaped beds, use Roundup® Weed & Grass Killer III.

Frequently Asked Questions

Our 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.

Weeds Controlled

Grass Weeds

Barnyardgrass; Bluegrass, annual; Crabgrass, large; Crabgrass, smooth; Crowfootgrass; Foxtail, giant; Foxtail, green; Foxtail, yellow; Goosegrass; Itchgrass; Johnsongrass (from seed); Junglerice; Lovegrass (from seed); Panicum, browntop; Panicum, fall; Panicum, Texas; Sandbur, field; Signalgrass; Sprangletop, Mexican; Sprangletop, red; Witchgrass; Woolly cupgrass

Broadleaf Weeds

Burweed, lawn; Carpetweed; Chickweed, common; Chickweed, mouseear; Clover, hop; Cudweed; Evening primrose; Fiddleneck; Filaree; Henbit; Knotweed, prostrate; Kochia; London rocket; Pigweed; Puncturevine; Purslane; Pusley, Florida; Rocket, London; Shepherdspurse; Smartweed, Pennsylvania; Speedwell, corn; Spurge, annual; Spurge, prostrate; Woodsorrel, yellow; Velvetleaf (Buttonweed)

Kids & Pets

  • Do not apply this product in a way that will contact any person or pet, either directly or through drift.
  • Keep people and pets out of the area during application.
  • Do not allow people or pets to enter the treated area until dusts have settled.
  • Do not enter or allow others to enter treated areas until watering-in is complete and the soil surface is dry.

Our Environment

  • This pesticide is toxic to fish. Runoff from treated areas may be hazardous to aquatic organisms in neighboring areas. To protect the environment, do not allow pesticide to enter or run off into storm drains, drainage ditches, gutters or surface waters.
  • Applying this product in calm weather when rain is not predicted for the next 24 hours will help to ensure that wind or rain does not blow or wash pesticide off the treatment area.
  • Sweeping any product that lands on a driveway, sidewalk, or street, back onto the treated area of the lawn or garden will help to prevent run off to water bodies or drainage systems.
  • In case of spills, either collect for use or dispose of properly.
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