The 5 Best Weed Killer For Horse Pasture

Tired of weed making an appearance again and again? Well, I have been in the same situation last year and I know how annoying this can be. Weeds grow throughout the year, it’s just that some weeds grow in summer whereas the other deadliest ones find fall more appropriate for the growth. Just so any time this year, you do not have to face this issue frequently we are here with some effective weed killer suggestions, buying guide, and some valuable tips. So without further ado, here are our top picks;

Best Weed Killer For Horse Pasture

Best Overall: Southern Ag 2,4-D Amine Weed Killer
Non Toxic: Doctor Kirchner Natural Weed Killer With No Hormone Disrupting Chemicals
Broadleaf weedicide: Southern Ag Lawn Weed Killer With Trimec Herbicide
All-in-one: Roundup All In One Weed Killer
Affordable: Ortho WeedClear Ready To Spray Weed Killer

1. Southern Ag 2,4-D Amine Weed Killer

Southern Agricultural Insecticides began serving the gardeners and lawn owners in 1930 when the gardeners and lawn owners badly needed fungicides, herbicides, and insecticides.

This manufacturer is known for offering the best pesticides, fertilizers, rooting hormones, plant growth regulators, safety equipment, and horticultural supplies.


To kill the weed and bring fruitful results, mix two or three tablespoons in 3-5 gallons of water. As per the manufacturer’s claim, this mixture is enough to treat 1000 square feet efficiently. It shows remarkable results when applied with a fan-type nozzle.


This Southern Ag is not an all-in-one sort of weed killer. It’s written on the package that the said weed killer is effective on “selective broadleaf weed” so it might not kill any other weed. It can be bought to control clover, chickweed, dandelion, milkweed, wild geranium, ivy, plantain, and thistle.


This forgiving weed killer can be used to boost pasture, golf courses, ditch banks, corn, small grains, and non-crop sites, etc.


  • Economical
  • Effective in controlling clover, chickweed, dandelion, milkweed, wild geranium, ivy, plantain, and thistle
  • Controls woody plants as well
  • Can be used to treat horse pasture, fences, and ditch banks, etc.
  • Can be used with a fan-type nozzle


  • Toxic, must be kept out of children’s reach
  • Works for selective weeds

2. Doctor Kirchner Natural Weed Killer With No Hormone Disrupting Chemicals

Doctor Kirchner is a famous Amazon seller who has been lifting the lawn and garden owners from distress.

Doctor Kirchner’s innovative products can be bought online or from stores located in your area. This weed killer made it to our list because it is manufactured by combining safe elements of nature.

Tested and approved by University of Florida

This forgiving natural weed killer is tried, tested, and approved by the University of Florida. It’s 100% effective in burning and flushing the weed from roots. Doctor Kirchner’s weed killer is safe to use around kids, pets, and wildlife.

Acetic acid, being an active ingredient, helps in degrading this natural weed killer effectively, causing no harm to soil health and underground water.

Sizes and deals

This exceptional weed killer comes in four sizes: 1 quart, 1, 2.5, and 5 gallons.


Doctor Kirchner’s weed killer can get rid of almost all common weeds. As per the company’s claim, it can treat more than 250 deadly weeds.

Other than eliminating weeds from the horse pasture, it is equally effective in bringing a healthier change to the residential, commercial, and agricultural property.


It contains sodium chloride, water, vinegar, and soap. To be more specific, sodium chloride is 4% of the solution and the other ingredients(water, vinegar, and soap) make about 96% of the total solution.


  • Natural and non-toxic
  • Contains soap, water, vinegar, and sodium chloride
  • Tried, tested, and approved by the University of Florida
  • Safe for kids, pets, wildlife, soil health, and underground water
  • Can be used to treat the residential, commercial, and agricultural property as well
  • Affordable
  • Kills more than 250 weeds


  • Harmful to swallow

3. Southern Ag Lawn Weed Killer With Trimec Herbicide

Southern Ag got recognition and fame because they have the solution for almost all garden or lawn-related problems. Other than serving the lawn and gardens with the best fungicides, fertilizers, and pesticides, this manufacturer is engaged in providing helpful gardening tips through safety data sheets, labels, and YouTube videos.


This weed killer comes in a ready-to-use form, no mixing or careful preparation is required. Best results can be obtained by applying it as a uniform spray with a fan nozzle hose-end end sprayer.


This is another broadleaf weed killer but it has proven to kill some other common weeds as well. However, it is most effective on white clover, creeping Charlie, curly dock, lambsquarter, purslane, henbit, wild buckwheat, ribwort plantain, oxalis, chickweed, and other such broadleaf weeds.


This Southern Ag lawn weed killer with trimeric herbicide is safe to be used on bermudagrass, bahiagrass, bluegrass, buffalo grass, bentgrass, centipede grass, ryegrass, fescue, st. Augustine grass, zoysia grass, etc. It is not suggested to use this weed killer on flora tam st. Augustine grass.


Though it belongs to a well-known brand, it does its job efficiently; killing the weed. What bothers most regular users is that it takes time to show results whereas most of the other solutions available in the market act super fast.


  • Kills almost all broadleaf weeds
  • Patented combination of three weed killers
  • Can be readily sprayed, no mixing or hard and fast preparation required
  • Listed with all necessary details


  • A bit pricey, one gallon may only treat a backyard pasture
  • Takes time in showing the noticeable result
  • A review suggested that it kills bermudagrass

4. Roundup All In One Weed Killer

This Roundup all-in-one weed killer is in Amazon’s choice as the best killer that kills weeds, not the lawns. This Roundup all in one weed killer’s demand decreased a few years back but it has now been back with a bang.

The Roundup demand is skyrocketing once again as its active ingredients are not discovered harmful for humans.


This all-in-one weed killer can effectively cure ryegrass, fescue, Bermuda grass, zoysia grass, buffalo grass, Kentucky bluegrass, and perennial ryegrass, etc. Use it after the application of horse pasture fertilizer.

Some regular users have found it effective for other grasses as well but the company claims it to be a good one for the grasses mentioned above.

Control and action

Being an all-in-one weed killer it is formulated to kill almost all kinds of weeds. However, the users have found it more effective on crabgrass, clover, dandelion, and yellow nutsedge.

The Roundup all-in-one weed killer is a fast-acting weed killer that starts immediately as sprayed. Unlike other weed killers, it becomes waterproof in just 3 hours.

Application method

To get fruitful results, you need to fill a Roundup branded tank sprayer with water, mix the weed killer and spray. The mixture will start working immediately and begin showing results in a couple of weeks.


  • All in one weed killer
  • Burns to roots
  • Control and prevent over 250 weeds
  • Becomes waterproof in 3 hours
  • Starts working immediately
  • Cure ryegrass, fescue, Bermuda grass, zoysia grass, buffalo grass, Kentucky bluegrass, and perennial ryegrass, etc
  • Shows results in a couple of weeks
  • Non-toxic
  • Comes with detailed instructions


  • None

5. Ortho WeedClear Ready To Spray Weed Killer

Ortho is best known for presenting the best solutions for bugs, weeds, and other garden issues. This Ortho WeedClear is another of Amazon’s best-selling weedkiller sprays that come at an affordable price and a handy packing.


This forgiving weed killer is though made to treat all possible weed types but it works exceptionally well for clover, crabgrass, foxtail, chickweed, and dandelion, etc.


Like every other weed killer listed here, the Ortho WeedClear ready to spray weed killer is best to be used on ryegrass, bermudagrass, fescues, Kentucky bluegrass, zoysiagrass, and buffalo grass, etc.


For best results, apply during the daytime when the temperature is below 90 f. If for horse pasture grass seed is planted, make sure the temperature is below 85 f.


  • Comes in a handy packing
  • Kills clover, crabgrass, foxtail, chickweed, and dandelion from the roots
  • Treats up to 200 plus troublesome weeds
  • Shows results after one application
  • Gets rainproof in an hour
  • Ready to use spray
  • One bottle can treat up to 5000 sq. ft


  • Comes in a small quantity

Now that the options we found best have been revealed, let’s move ahead and discuss what do you need to consider while buying a weed killer.

How to Pick the Right Weed Killer for a Horse Pasture?

It’s not that hard to find a good weed killer online or from a local store nearby. Look for the


The first thing that should be bothering you is “active ingredients”. Carefully look if any disclaimer is given. If the active ingredients are safe for you, kids, pets, and the environment, this weed killer can be shortlisted.


As you are bringing a weed killer home to kill or control weed, open the listed photos in a new tab, zoom in and see what the packing says. If the weed killer you have chosen is made for treating the weed growing in your area, it can be the right option.


We usually plant Kentucky bluegrass for horse pasture, the said option is nutritional and economical. Some other grasses have now been planted as horse pasture as well, make sure if the weed killer you have selected does not burn the horse pasture.


Now after investigating the ingredients, it is recommended to double-check the quantity as well. If the pasture is growing on a large scale, you would have to invest in some cheap yet effective weed killer.


Price should also be your concern as some products on Amazon are overly expensive. Right before hitting the ” place an order button” search again and try finding a weed killer that is being sold at the right price.

How To Successfully Eliminate Weeds From the Horse Pasture?

Well, to nip the evil in the bud you first need to identify which weed is bringing the horse pasture down.

Make sure the weed killer you are investing in is made to kill that particular weed. You would not find any specific weed killer, there is no way another way than investing in a general-purpose weed killer.

A weed and feed is a fine option if the weed has not taken the entire pasture area down. If the attack is deadly, consider investing in an all-in-one weed killer.

Choose a “ready to spray” weed killer and do not try to dilute it in water(unless it is written on the label). Spray as it has come in the packing.

Investing in a good weed killer is not enough, having the right tool; sprayer is equally important.

Take the quantity measurements very seriously as such products contain dangerous elements, so overdose would burn and the underdose may fail to serve up to expectations.

Set a goal, whether you want to kill or prevent weed? If you want to kill, invest in a curative weed killer but if preventing weed is your concern, choose what good for the preventive purposes.

Following the directions properly is the key. If you are planning to prevent weed from bringing your horse pasture down, look how the manufacturer wants you to do prevent weed from showing heads again. In the other case(killing weed from roots), look what you are supposed to do to cure the evil. Usually, weed killers are applied in spring to prevent them from making an appearance.

Our recommendation

Lastly, I would like to reveal which one from the shortlisted options suited my horse pasture more. I have tried several weed killers, nothing worked up to my expectations except the Southern Ag 2,4-D Amine Weed Killer. It may or may not work for you, I would suggest you not blindly trust the suggested options, be the judge, and choose what looks more promising for your horse pasture.

Iqra Maryam is a passionate equestrian who has spent her life researching and writing about equine. She remembers playing with her pony more than toys and friends! With time, she managed to train her Pony and did all research related to the well being of her friend. She trains young equestrian and writes thoughtful articles on them. She believes each horse is a new learning experience and it sparks up her equine passion.

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