4-Speed XT Selective Herbicide

4.5 out of 5 stars 3 Reviews | 34 Q&A

4 - Speed XT Selective Herbicide - Quart
4 - Speed XT Selective Herbicide - Quart

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Average Rating

4.5 out of 5 stars Rating: 4.3

3 Reviews | 34 Q&A

Product Overview

4-Speed XT provides rapid, effective control of a wide range of post-emergent broadleaf weeds in many settings, including cemeteries, athletic fields, golf courses (aprons, fairways, roughs, and tees), parks, lawns, sod farms, and other professional turf sites. The high-powered blend of four active ingredients creates a combination that is deadly to almost any broadleaf weed, including tough weeds like ground ivy, violet, and spurge. Results will noticed in as little as 24 hours.

Available Sizes:

  • 4-Speed XT – quart
  • 4-Speed XT – 2.5 gallon

Features and Specs

Active Ingredient 2,4-D, 2-ethylhexyl ester 41.92% Dicamba 3.46% Pyraflufen-ethyl 0.07% >br> Triclopyr, butoxyethyl ester 4.81%
Target pests 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, Wild violet, White clover and many others
* See label for complete list
For use in Cool & Warm-Season Turf: Athletic fields, Cemeteries, Golf courses (fairways, aprons, tees and roughs), Lawns, Parks, Sod farms
Application 1.1 - 1.5 oz. per 0.1 - 5 gallons of water per 1,000 sq. ft.
3 - 4 pints per 3 - 220 gallons of water per acre
* See label for complete application instructions
Pet safe Yes, when used as directed on label
Formulation Professional Product
CA, CT, MA, NJ, NM, VT (Restricted To Licensed Applicators Only)
LA, TX, WA (1 & 2.5 Gallon Sizes Restricted To Licensed Applicators Only)
Shipping Weight 21.25 lbs
Manufacturer Nufarm
UPC 191662011289
EPA Registration 228-590


  • Fast-acting broadleaf weed control with visible results within 24 to 48 hours
  • Premium chemistry of four active ingredients
  • Maximum control of hard-to-control weeds like wild violet, ground ivy and spurge
  • Good tolerance on established cool- and warm-season turfgrasses
5 stars   1
4 stars   2
3 stars   0
2 stars   0
1 star   0
Review Search   
Sort Reviews
  • 5 of 5 Stars

    Works as advertised

    By Matthew on 07/13/2016

    Was using Trimec 992 before I bought this. The Trimec didn't touch the Wild Violet in the yard but this certainly did. It is a lot more expensive than the Trimec but it finally killed the tough weeds. Trimec is fine for most weeds and usually needed a second application to kill them all but this worked great on all the weeds and no need for a second application. Works as advertised and worth it for the cost.

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    21 of 23 people found this review helpful

  • 4 of 5 Stars

    Better than anything at the big box store

    By Stephen on 05/11/2019

    In my first application to wild violets I saw the plant wilt far more than any other broadleaf spray from the box stores. I have no doubt 4 speed will significantly slow the growth of wild violets with consistent applications.

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    9 of 9 people found this review helpful

  • 4 of 5 Stars

    Looking Good and is working

    By Claude on 06/07/2019

    looks like it is working on my Wild Violet problem - as well as all other weeds in 24 hrs - wilting . dandelions as well curling up- in 1 week 50 % gone but I will take couple of weeks I guess - Went this this version - Weed B Gone did not work - as well as Oxylic Weed killer

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    6 of 6 people found this review helpful

See all 3 customer reviews

Questions & Answers

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Sort Questions
How many ounces of 4 Speed XT do I use per gallon of water to spot spray weeds with a tank sprayer?

How many ounces of product per gallon of water should I put in my tank sprayer?


The mixing ratio of 4-Speed XT for fescue is 1.1-1.5 fl. oz. per gallon of water. This will treat approximately 1000 square feet.

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106 of 118 people found this answer helpful

What is the shelf life of 4-Speed XT if stored 55 to 75 degrees?
The 4-Speed XT will have a shelf life of 3-5 years as long as it is stored in moderate temperatures of 55 to 75 degrees,

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41 of 43 people found this answer helpful

How long before you can water after an application of 4-Speed XT?

What is the safe time before pets can use the yard?


Do not apply 4-Speed XT if rainfall is expected within 4 hours and avoid irrigation for 24 hours following the application. Children and pets should not be present during the application and may return after the treated surfaces are completely dried.

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40 of 40 people found this answer helpful

How long do I wait to see results with 4-Speed XT and determine if I need an additional treatment?

You will notice results with 4-Speed XT in as little as 24 hours but it can take up to 2 weeks to completely kill weeds.  You are limited to 2 appliations per year as directed on the product label.

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28 of 29 people found this answer helpful

How much 4 speed to a gallon of water?
When using herbicides such as 4 Speed XT, the amount of water is dependent on the how much water it takes to cover a 1,000 sq ft area. The best way to gauge this is by marking off a 10ft by 100ft area. Fill your pump sprayer and "mock" spray the area thoroughly. This will tell you how much water to mix the 4 Speed XT with. 

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20 of 54 people found this answer helpful

See all 34 customer questions

4-Speed XT Selective Herbicide 4.5 out of 5 stars Rating: 4.3 (3 Reviews / 34 Q&A)

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