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4-Speed XT Post-Emergent Herbicide Weed Killer

55 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 do 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

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Customer Reviews
4.7 Based on 55 Reviews
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Filter Reviews:
    United States United States
    I recommend this product
    1st order with website

    I’ve used this product in the past and it is an excellent product

    Martin M.
    United States United States
    I recommend this product
    try again to **** Creeping Charlie

    First time it seemed to work, most CC gone in 3-4 weeks, but then it came back. Used it at 3oz/gal water on established lawn. Will retry at higher concentration, 4-5oz/gal water. Also will cut and bag grass before application to expose crawling leaves. Will see how that goes.

    United States United States
    I recommend this product
    Best price around

    The directions on the 4speed xt is slightly confusing, I think I applied too lightly. I still saw results from the application, but it took a few weeks to see results, so just be patient!

    Vishwas G.
    United States United States
    I recommend this product
    4speed Xt

    I have used 4 speed xt previously ie before I had purchased it from you. The product is very effective. I would recommend it.

    United States United States
    I recommend this product
    4-Speed XT Herbicide

    This is hands down the best **** killer I have ever used.

    Martin M.
    United States United States
    I recommend this product
    Attacking creeping Charlie in yard

    So far so good. Been 2 weeks since I hand sprayed with 5oz per 4 gal water and used a blue dye to avoid over-spray. Quick **** of dandelions, small thistles. Creeping Charlie is showing signs of dying finally after 2 weeks. One interesting note is that the smell of the 4 speed XT was still very prevalent for almost 2 weeks.