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Cornerstone Plus Post-Emergent Herbicide

22 reviews
Usually Ships in 1-2 days
Get broad-spectrum weed control with Cornerstone Plus Herbicide, an effective herbicide for eradicating post-emergent weeds on turfgrass and Roundup Ready crops. It contains an active ingredient for controlling both annual and perennial weeds and goes from the shoots to the roots as it eliminates the plants. With the power to target more than 100 different weed species, this nonselective herbicide does the job of multiple products. If you want something better for your weed management, go with Cornerstone Plus herbicide.

Features and Specifications

Active Ingredient(s) Glyphosate 41%
Weed Killer Kills: Annual Weeds, Perennial Weeds, Broadleaf Weeds, Grasses
Sale Prohibited AK, CA, HI, WA
Shipping Rate Free
EPA Registration

How Cornerstone Plus Works

Cornerstone Plus Herbicide contains glyphosate, a high-potency ingredient for the successful killing of broadleaf weeds and grasses. After spraying, the weed absorbs the herbicide and circulates it throughout the plant and down into the roots. It slowly kills competing weeds that strangle desirable plants and grasses in the same area. You can also use Cornerstone Plus with an adjuvant or a surfactant in the tank for optimal weed performance.


Where to Use Cornerstone Plus Herbicide

Use Cornerstone Plus Herbicide to kill unwanted weeds and grasses on Roundup Ready crops such as canola, cotton and soybean. It also targets weeds in pastures, range lands, greenhouses and shade houses. Apply Cornerstone Plus for habitat management or as an injection for woody brush and trees. It also keeps turfgrass, industrial sites, railroads and roadsides free of weeds.


Target Weeds

Cornerstone Plus Herbicide affects more than 100 broadleaf weeds and grasses. From barnyardgrass to carpetweed, this herbicide works after one spray and kills bothersome weeds where they grow. It also takes out many common weeds such as chickweed, crabgrass and dwarf dandelion. Other target weeds include:

  • Corn speedwell
  • Fleabane
  • Foxtail
  • Henbit
  • Johnsongrass
  • London rocket
  • Pigweed
  • Ragweed
  • Smartgrass
  • Stinkgrass
  • Wheat
  • Witchgrass


Cornerstone Plus Herbicide Features and Benefits

  • Power to kill more than 100 annual and perennial broadleaf weeds and grasses
  • Contains glyphosate for effective and successful weed elimination
  • For use on turf, industrial sites, Roundup Ready crops and other labeled areas
  • Tank-mix compatible with some adjuvants and surfactants for better control
  • Easy to mix and apply and has a wide window of application


Tips for Use

  • Use 24 ounces per acre to control downy brome using a no-till system.
  • Target wheat before the boot stage for the best results.
  • Avoid treating kochia in the button stage.


Cornerstone Plus Has the Power to Eliminate Weeds

With Cornerstone Plus, you can target, kill and control many different weeds and grasses with one product. The active ingredient glyphosate goes from the shoots to the roots and provides successful eradication of invasive plants on turfgrass, roadsides and Roundup Ready-treated crops. You can even use it with a tank mixture for greater weed control where you need it. For maximum weed-fighting power, go with the effectiveness and strength of Cornerstone Plus herbicide.


It is a violation of Federal law to use this product in a manner inconsistent with its labeling. Do not apply this product in a way that will contact workers or other persons, either directly or through drift. Only protected handlers may be in the area during application. For any requirements specific to your State or Tribe, consult the agency responsible for pesticide regulations.


For additional information on this product please reference the CDMS label database listed below



Ask a Question
  • Do I water after applying


  • What ratio is the mixing solution. Cornerstone/Water

    1 to 1.5oz per gallon of water

  • If I spray cornerstone plus around trees to kill the grass will it kill the tree?

    Please see the cornerstone plus product label for use around trees https://www.winfieldunited.com/product/cornerstone%C2%AE%20plus/235

  • how many ounces of product per gallon of water ?

    1 to 1.5oz per gallon of water

  • Will this kill Saint Augustine turf grass if broadcast sprayed?

    It is best to spray a test plot in the affected area to make this determaintion

  • When can lawn be reseeded

    6 weeks

  • Im spraying an area to plant food plots for hunting season. How long after spraying this product can I plow and plant over it without affecting the seed production. Thanks

    Six Weeks

  • How long do you have to wait before you get a rain on it

    12 hour or more is best.

  • Does it kill poison oak and poison ivy?

    Yes at a higher rate of 2 to 3 oz per gallon mix

  • Will this kill trees? I have a fence line close to trees and I am wanting to use this on the fence line but i do not want to harm my trees.

    Be very mindful of Drift. I would use a surfactant as well. Don’t spray inside the drip line or on any suckers from your trees. Make sure you want to kill everything you spray. 

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Customer Reviews
4.8 Based on 22 Reviews
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Filter Reviews:
    United States United States
    I recommend this product
    First purchase

    This was my first purchase from Phoenix. The site was easy to navigate and the product showed up at my doorstep earlier than I thought. I will be buying more product in the future.

    vicky m.
    United States United States
    I recommend this product

    havent used it yet but havee used it before your company is a very fast shipper thank you so much

    Mark J.
    United States United States
    I recommend this product
    Previous experience has been good.

    I’ve previously used this product and been happy with effects.

    United States United States
    I recommend this product
    Not the **** killer I wanted !!!!!!!

    You had some stronger **** killer that went on sale a few days after I bought this stuff. I would recommend the other stuff not 41% weedkiller but the 53% week killer that I wanted.

    Meranda S.
    United States United States
    I recommend this product

    Item works wonders! Had a little confusion about shipping details but the problem was resolved in a timely and professional manner! Very pleased.

    United States United States
    I recommend this product
    Slow delivery

    Product is good, have used before. When placing order sad it would ship in a day or two and if it doesn’t arrive within a week to contact them. I did not arrive and I did contact but never received an answer. Product did finally arrive.