How Much Cornerstone Plus per Gallon of Water [4 Mixing Tips]

Mix 3 to 4 ounces of Cornerstone plus per gallon of water. When mixing Cornerstone Plus for application, it’s important to add the herbicide to your pump sprayer first. Then, add a non-ionic surfactant to encourage the Cornerstone to stick to plants for increased effectiveness. After measuring and adding these two ingredients, fill your sprayer with water to ensure the contents are properly mixed.

How much Cornerstone Plus per gallon of water

How Do You Mix Cornerstone Herbicide?

You can make your own powerful nonselective herbicide from Cornerstone Plus concentrate. This method can save money when you compare Cornerstone Plus vs Roundup, since both herbicides contain the same active ingredient. Here’s how to mix Cornerstone yourself.

Prepare Your Sprayer

Whether you are using a pump sprayer, backpack sprayer, or spray bottle, begin with an empty container. Make sure your sprayer has no other liquids or materials inside before you begin. Ideally, your sprayer should be clean, dry, and empty. This will allow you to mix the Cornerstone Plus properly for the application.

Measure Your Cornerstone Plus

Add 3–4 ounces of Cornerstone Plus to your sprayer for every 1 gallon of water. In order to make measuring easy, use a tablespoon designed for kitchen use. 2 tablespoons equal 1 ounce. So, add 6–8 tablespoons for every gallon of water your sprayer holds. Just remember not to use the same tablespoon in the kitchen—Cornerstone Plus contains strong herbicides. Measuring devices used for herbicides should not be used for cooking.

Add a Non-Ionic Surfactant

After adding your Cornerstone Plus to the sprayer, follow up by adding 1 teaspoon of this non-ionic surfactant for every gallon of water your sprayer holds. Unlike more expensive herbicide sprays that are pre-mixed with a surfactant, Cornerstone works best when you add a non-ionic surfactant yourself. This surfactant helps the herbicide stick to the plants you spray, which ensures you will kill weeds effectively. In order to maximize the weed-killing power of your spray, it is essential not to skip this step.

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Add Water

After adding Cornerstone Plus and surfactant to your sprayer, fill the sprayer with water. It is a great idea to use a garden hose with a spray nozzle to add the water to your pump sprayer. The force of the water coming from the nozzle will help to mix the herbicide, surfactant, and water together. Once your sprayer is filled with water and the ingredients are thoroughly mixed, you can begin using your Cornerstone to control a broad spectrum of weeds and grasses.

Can You Mix Cornerstone Plus and 2,4-D?

It is not useful to mix Cornerstone Plus with 2,4-D because the two herbicides have different uses. Cornerstone Plus is a non-selective herbicide that attacks all plants it is sprayed on. So, you should only use Cornerstone Plus where you want to kill all the plants growing in the area. 2,4-D, on the other hand, is a selective weed killer that will broadleaf plants but won’t harm grass. You should use 2,4-D to kill weeds in your lawn without harming grass.

  • Cornerstone Plus and 2,4-D should not be mixed.
  • Use Cornerstone Plus to kill all weeds and grasses in an area.
  • 2,4-D is best used to kill broadleaf weeds without harming grass.
  • Since Cornerstone Plus kills all plants it is sprayed on, mixing it with 2,4-D removes the 2,4-D’s ability to kill weeds without harming grass.

Cornerstone Plus is strong enough to kill both weeds and grasses without adding 2,4-D, so mixing the two is unnecessary. Additionally, if you want to use 2,4-D to kill broadleaf weeds without harming grass, don’t add Cornerstone Plus to the mix. The Cornerstone will attack and kill your grass.

How Long Does it Take Cornerstone Plus to Work?

Cornerstone Plus will kill a plant entirely in 7–14 days. This includes the time it takes for Cornerstone Plus to kill the plant’s roots. Although you may see plant discoloration and wilting within days after spraying Cornerstone Plus, it takes time for the herbicide to fully infiltrate the plant and kill all its parts. After 14 days, it’s safe to fully uproot the plants you sprayed and discard them.

  • Plants will die completely 7–14 days after being sprayed with Cornerstone Plus.
  • You may see plants wilting in days—or even hours.
  • Allow 2 weeks before you uproot dead weeds and plant new vegetation.

Because the active ingredient in Cornerstone Plus is glyphosate, it will kill weeds just as quickly as other glyphosate-containing products, such as Roundup. Glyphosate breaks down quickly in soil. Once you’ve waited 2 weeks for the weeds to die, the ground is safe for you to plant whatever you want.

How Much Cornerstone Plus Do You Mix Per Gallon of Water?

When mixing Cornerstone with water, follow these simple steps for success:

  • Begin with a clean, dry sprayer.
  • Add 3–4 ounces of Cornerstone Plus for every gallon of water your sprayer holds.
  • Pour in 1 teaspoon of non-ionic surfactant for every gallon of sprayer capacity.
  • Add water with a hose to fill your sprayer.

It’s that easy. You can mix up a batch of Cornerstone Plus to attack weeds growing up through driveway seams, along fencerows, or anywhere else you need to kill tough plants to the root.

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