Skip to main content
Customize by ZIP Code

User account menu

  • Help Center
Menu Search
Home Home
Roundup

Main Navigation (US)

  • Products

    • Landscape Weeds

    • Driveway & Patio Weeds

    • Lawn Weeds & Bugs

    • Poison Ivy & Tough Brush

    • Concentrates

    • Refills

  • Product Picker

  • Weeding Wisely

    • Learning the Basics

    • Using Products Properly

    • Specific Weeds

    • Learning the Basics

    • Using Products Properly

    • Specific Weeds

    • General Weeding

    • Landscape Projects

  • Help Center

    • Email Us

    • Site Map

    • Terms & Conditions

    • About Us

Search

FREE SHIPPING ON ORDERS $35 OR MORE

Roundup® Ready-To-Use Weed & Grass Killer III Refill
1. Roundup Weed and Grass Killer held in hands
Alt 2
RoundUp weed and grass killer refill pouring into sprayer
8. Product Usage Chart
4. Which Roundup product is right for me?
7. Product Usage Chart
5003810.png - Roundup® Ready-To-Use Weed & Grass Killer III Refill Packshot 1. Roundup Weed and Grass Killer held in hands Alt 2 RoundUp weed and grass killer refill pouring into sprayer 8. Product Usage Chart 4. Which Roundup product is right for me? 7. Product Usage Chart

Roundup® Ready-To-Use Weed & Grass Killer III Refill

5003810
4.518

Overview & Benefits

Kill the toughest weeds and grasses down to the root with Roundup® Ready-To-Use Weed & Grass Killer III refill! The formula is ideal for use in and around vegetable gardens, flower beds, tree rings, and mulched beds, as well as on cracks in driveways, walkways, and patios. This convenient, no-mix formula is rainproof in just ten minutes—AND you get visible results in 3 hours. Simply pour into your any Ready-To-Use Roundup® Weed & Grass Killer III applicator and kill weeds faster with Roundup®.

LEARN
SPECS

Pairs Nicely With

Related Products

Jug of Roundup® Ready-To-Use Weed & Grass Killer III with Comfort Wand®
Roundup® Ready-To-Use Weed & Grass Killer III with Comfort Wand®
Learn More

Key Features

Roundup® Ready-To-Use Weed & Grass Killer III Refill
Roundup Ready-to-Use Weed & Grass Killer III Refill
Roundup Ready-to-Use Weed & Grass Killer III Refill is easy to use with a convenient, no-mix formula. For use in and around vegetable gardens, flower beds, tree rings and mulched beds, as well as on cracks in driveways, walkways and patios. Rainproof in 10 minutes and visible results in 3 hours. Absorbed through the leaves, it goes all the way to the root for a total kill. A simple way to keep your driveway, patio and mulched beds looking good.
Features & Benefits
Easy to Refill

Easy to Refill

Quickly refill your existing Roundup Ready-to-Use Weed & Grass Killer III with Comfort Wand. No mixing and no measuring!

Refill Your Pump ‘N Go

Refill Your Pump ‘N Go

Also, it’s easy to refill your Pump ‘N Go 2 Sprayer bottle.

Kills Weeds to the Root!

Kills Weeds to the Root!

Spray existing weeds and grasses you want to kill. Always read and follow label directions.

  • Learn
  • Gardens
  • Product Specs

Overview

  • Kills the toughest weeds and grasses to the root. Guaranteed!* *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.
  • Convenient, no-mix formula
  • Use in and around vegetable gardens, flower beds, tree rings and mulched beds, as well as on cracks in driveways, walkways and patios
  • Rainproof in 10 minutes
  • Visible results in 3 hours
Roundup

How to use

Slowly pour refill into an empty Roundup® Ready-to-Use Weed & Grass Killer III applicator being careful not to overfill. Pouring slowly will help reduce foaming. People and pets may enter treated areas after the spray has dried.

Where to use

May be used around vegetable gardens. Also use on patios, walkways, driveways, gravel and mulch beds, around shrubs or trees, in flower beds and along fences.

Where not to use

For weed control in your lawn, try Roundup® For Lawns.

When to apply

Apply when weeds are actively growing. Be sure to spray when the air is calm to prevent drift to desirable plants.

Our Environment

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 when rain is not predicted for the next 24 hours will help to ensure that rain does not wash pesticide off the treatment area.

Guarantee

Kills the Roots, Guaranteed!*

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.

Coverage area

Your coverage will vary based on the number of weeds treated and the size of the weeds in a given area.

Category

Landscape Weeds
Refills

Disposal Methods

IF EMPTY: Place in the 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.

Kids & Pets

People and pets many enter treated area after spray has dried. The main active ingredient in Roundup® Weed and Grass Killer products is glyphosate.  It works by targeting an enzyme that is essential to plant growth.

Product Label

This is not the product label. Always read and follow the product label before use.

View Label

Packaging

Bottle

Shelf Life

4 years

Special Instructions

All ornamental flowers, trees and shrubs may be planted one day after application. Lawn grasses, herbs, vegetables and fruit can be planted 3 days after application. The main active ingredient in Roundup® Weed and Grass Killer products is glyphosate.  It works by targeting an enzyme that is essential to plant growth.

Active Ingredients

2% Glyphosate, 2% Pelargonic and other related fatty acids.

Ratings & Reviews

Social Media

  • Youtube

Footer menu

  • General Conditions of Use
  • Privacy Statement
  • Return Policy
  • Contact Us
  • Site Map
  • The Scotts Miracle-Gro Company
  • Investor Relations
  • Our Brands
  • Careers

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. © 2020 Monsanto Company, worldwide rights reserved.