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4-Speed XT Post-Emergent Herbicide Weed Killer

65 reviews
Usually Ships in 1-2 days
For effective post-emergent weed control, 4-Speed XT Post-Emergent Herbicide Weed Killer delivers quality results quickly and efficiently. This liquid herbicide works to control a variety of broadleaf weeds and grasses in residential and commercial landscapes. It kills tough weeds like spurge and ground ivy and shows results in under 24 to 48 hours. 4-Speed XT is safe to use around pets when it's applied as directed, and it produces weed-free lawns with very little work involved.

Features and Specifications

Active Ingredient(s) 2,4-D 41.92%, Triclopyr 4.81%, Dicamba 3.46%, Pyraflufen-enthyl 0.067%
Weed Killer Beggarweed, Bindweed, Black medic, Buckhorn, Chickweed, Dandelion, Florida pusley, Frenchweed, Goldenrod, Ground ivy, Henbit, Jimsonweed, Knawel, Knotweed, Kochia, Lambsquarters, Lespedeza, Little starwort, Mallow, Oxalis, Pennywort, Pepperweed, Pigweed, Plantain, Purslane, Ragweed, Red clover, Red sorrel, Sheep sorrel, Spurge, Thistle, Toadflax, Veronica, Vetch, Wild aster,
Sale Prohibited AK, CA, HI, WA, NY
Shipping Rate Free
UPC 094922016478
EPA Registration 228-590

How does 2,4-D Herbicides like 4-Speed XT Work?

4-Speed XT gets its name from the four active ingredients that help it work. This herbicide contains 2,4-D as the main ingredient, including triclopyr, dicamba and pyraflufen-ethyl as the secondary ingredients. Combined, these four components create a lethal mixture for stubborn weeds and grasses in almost any setting.

Which Weeds do 2,4-D Herbicides like 4-Speed XT Kill?

4-Speed XT works quickly to stop hard-to-control weeds from taking over a landscape. Some of the weeds that it helps to control include:

  • Beggarweed
  • Chickweed
  • Knotweed
  • Mallow
  • Pigweed
  • Ragweed
  • Thistle
  • White clover

Where to Use 4-Speed XT:

Use 4-Speed XT in places where broadleaf weeds have taken hold, such as home lawns and business landscapes. Other areas for use include:

  • Athletic fields
  • Cemeteries
  • Golf courses
  • Recreational parks
  • Sod farms

How to Use and Apply 4-Speed XT:

Use 1.1 to 1.5 ounces of 4-Speed XT per 0.1 to 5 gallons of water in a 1,000-square-foot area. In addition, use between 3 and 4 pints per 3 to 220 gallons of water per acre. When in doubt, look to the label for further directions.

Stop Hard-to-Control Weeds Fast with 4-Speed XT

With 4-Speed XT herbicide, broadleaf weeds and grasses start to die within 24 to 48 hours. The product's four ingredients work together to eradicate weeds without harming established cool- and warm-season turfgrass. When invasive broadleaf weeds pop up in your lawn, knock them down with 4-Speed XT.


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
  • Does it kill oxsolas

    Yes it will kill Oxsolas but it may take a few applications

  • Does it kill violets?

    Please refer to the 4-speed xt product label for your answer

  • Trying to control wild violet under a Linden tree. Will the application of this product kill the tree?

    You will need to check the product label for use around linden trees.

  • Does this product kill Wild Ivy?

    Yes but it is really hard to kill

  • How long before mowing

    72 Hours

  • how after applying can i water the grass?

    8 hours

Customer Reviews
4.8 Based on 65 Reviews
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Filter Reviews:
    United States
    I recommend this product

    Excellent results

    Product was easy to use with my 2 gallon pump sprayer. Within a few days the wild orchid scattered throughout my lawn began turning pale yellow.

    United States United States
    I recommend this product

    Wild violets beware

    So glad to have found something that is effective in getting the wild violets out of my lawn. This product does a great job. I do my two annual applications about green weeks apart each autumn. It does take 7 oz/gal to effectively eradicate them. I've tried less and it doesn't work well.

    James K.
    United States United States
    I recommend this product

    4 speed xt

    It killed the Wild Violets so far ...It has Tricyclor in it ... Lowes chemicals do not .... Wish price was cheaper tho I am getting **** killer at Lowe's fir $12 fir 32 oz and works on weeds in yard other than Wild Violets ...

    Dean K.
    United States United States
    I recommend this product

    4Speed XT Great Value

    I’ve been using this product for about six years and have had great results with it. Your price beat everyone, local and on the Internet. Thank you and I will continue shopping here.

    Craig P.
    United States United States
    I recommend this product

    Repeat User

    I have finally found a product effective on wild violets. This is a tremendous product and PedChem is great to buy from.

    Craig P.
    United States United States
    I recommend this product

    First time user

    I read quite a lot about this product and the wide range of concentrations that are used. I decided to start with two ounces per gallon to make sure my lawn tolerated it. I'm about 5 days out and the wild violets, chickweed, and clover (the prominent weeds in my lawn) are all showing signs of distress. So I would say it's looking promising. I have a small front yard and a large backyard, so I chose to start in the front and see how it worked. Looks like I'll be taking on the backyard soon. It looks like I'll probably need to dial up the concentration to fully eradicate the weeds.