Top 10 Best Organic Weed Killers ǀ 2021 Reviews + Guide

Using safer options like the best organic weed killers can be the better solution for you and your weed problems in the yard. If you are among homeowners and landscape professionals looking for effective herbicides that won’t cause potential health effects, you’ve come to the right place.

There are many advantages to using the best organic weed killers instead of those toxic chemicals in conventional herbicides. For one, all-natural weed killers won’t cause harm to the habitat, land, or aquatic. Plus, bio-safe weed control products are generally safer for you, the kids, and the pets. You don’t have to wait for days to get the garden ready for everyone again, unlike when you use herbicides containing toxic chemicals.

If you want to go greener and safer in your yard care maintenance, here are some best organic weed killers that are tough on weeds but gentle on you and the environment.

Top 10 Best Organic Weed Killers Reviewed

  1. Natural Armor All-Natural Weed and Grass Killer – Best Overall
  2. Doctor Kirchner Natural Weed and Grass Killer – Best Value
  3. Bonide Burnout Weed Killer Concentrate – Editor’s Choice
  4. Green Gobbler Vinegar Natural and Organic Weed and Grass Killer
  5. Nature’s Avenger Organic Weed Killer Concentrate 
  6. ECO Garden Pro Organic Vinegar Natural Weed Killer 
  7. BioSafe Systems 7601-1 Organic Weed Killer Concentrate 
  8. Organic Matters Natural Weed Killer Spray 
  9. Natural Elements Weed Killer 
  10. No products found. 

#1. Natural Armor All-Natural Weed and Grass Killer – Best Overall

Natural Armor All-Natural Weed and Grass Killer

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  • Active ingredient: Sodium Chloride, Vinegar, Lemon, Citric Acid, Clove Oil
  • Type: non-selective herbicide
  • Action time: 24 hours
  • Formulation: ready-to-use spray-and-go solution
  • Best used for wells, barns, patios, pavers, walkways, pool areas, fencing lines, around flower beds

Natural Armor, from the name itself, promises an all-natural solution to fight against the toughest weeds. It’s our top favorite primarily because it lives up to its name and more. This non-selective herbicide only contains natural ingredients, safe to use without harsh chemicals like glyphosate common in conventional weed killers. 

If you’re having second-thoughts if natural ingredients effectively kill pesky weeds in the yard, this product will show you what’s you’re missing out on. It boasts an incredibly potent mixture of several natural herbicides like sodium chloride, citric acid, vinegar, and clove oil. It has every natural active ingredient you can think of, giving it enough power to get rid of more than 250 types of grasses and weeds. 

It’s a non-toxic solution that can effectively clear out grave areas, pavers, walkways, pool areas, fencing lines, and water systems without compromising your health and the environment. It’s also safe for humans and pets. What’s even better is the fantastic set of active ingredients gives this product fast-acting capabilities, showing visible results less than 24 hours from application.

However, like any non-selective herbicide, this solution can harm anything that it comes into contact with. Handle and apply it carefully to avoid killing your precious plants and shrubs nearby.

All-natural formulation; no glyphosate and other harmful chemicals
Leaking spray
Fast-acting with visible results after hours from application
Biodegradable, non-toxic, and environmentally-friendly
Easy to use

#2. Doctor Kirchner Natural Weed and Grass Killer – Best Value

Doctor Kirchner Natural Weed and Grass Killer

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  • Active ingredient: 4% sodium chloride, ocean saltwater, vinegar, soap
  • Type: non-selective post-emergent herbicide
  • Action time: one hour
  • Formulation: ready-to-use
  • Rainproof after 30 minutes

The natural weed and grass killer from Doctor Kirchner is one of our best organic weed killers for many reasons. Firstly, it’s one of the cutting-edge products that use ocean saltwater and food-grade vinegar to create a potent weed control solution. It comes pre-mixed, making it hassle-free to use without worrying if you’ve mixed the right amount of water. 

Spraying this solution to unwanted weeds and grass will kill them quicker than you would have thought an all-natural product could do. It can show fantastic results within an hour, making sure that those pesky weeds die overnight. 

We are also impressed that even with a tough herbicide, it’s safe to the surrounding, thanks for its glyphosate-free and overall chemical-free formula. This weed killer is a post-emergent herbicide, which can effectively get rid of established weeds. Another notable feature is its rainproof protection 30 minutes to one hour after the initial application. And because it’s a non-selective herbicide, it’s not suitable for use where you want to keep other grasses or plants. However, it’s a perfect solution for clearing out borders, pool decks, walkways, and pavers.   

No glyphosate and other hormone-disrupting chemicalsNot the most affordable option
Shows initial signs of wither in hours
Safe for use around kids and pets
Simple spray application

#3. Bonide Burnout Weed Killer Concentrate – Editor’s Choice

Bonide Burnout Weed Killer Concentrate

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  • Active ingredient: Citric acid, clove oil
  • Type: non-selective herbicide
  • Action time: hours
  • Formulation: concentrate
  • Best for use around sidewalks, driveways, greenhouses, and around buildings

If you want to get rid of unwanted weeds and grasses quickly, there’s no reason to look further than the Burnout Weed Killer Concentrate from Bonide. It features a strong formulation from its citric acid and clove oil active ingredients. It’s potent enough to show visible results of dying weeds mere hours after your initial application. Plus, it can handle numerous types of broadleaf plants and grassy weeds. 

One stand-out feature of this organic weed killer remains an effective weed killer even after it dries and becomes waterproof. It gives you the best results from a single spray, and more often than not, you won’t need to reapply the herbicide even after it rains.

This herbicide is a concentrate that you need to mix with water. It works best when applied using a spray bottle, although you need to be careful not to touch plants you don’t want to harm. Warm or cool weather, this is one of the best organic weed killers you can use in the garden.

Works even at low temperaturesMay harm other nearby plants
Waterproof after application
Pet and people-friendly
Dries after application

#4. Green Gobbler Vinegar Natural and Organic Weed and Grass Killer

Green Gobbler Vinegar Natural and Organic Weed and Grass Killer

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  • Active ingredient: 20% acetic acid
  • Type: non-selective herbicide
  • Action time: less than 24 hours
  • Formulation: ready-to-use solution
  • Best for use in commercial, industrial, agricultural, and residential spaces

Acetic acid, vinegar obtained from maize, is a fantastic natural herbicide. It’s the primary active ingredient in Green Gobbler Vinegar Weed and Grass Killer. It doesn’t contain a small amount of the potent ingredient, but 20% of this ready-to-use solution is acetic acid, making a highly concentrated weed control formula. 

This product is 100% organic, but what we like best about it is it’s a strong weed killer that can dry out and kill even the toughest weeds overnight. It’s an incredible choice if you want to clear out residential and agricultural spaces without causing grave effects to the land. This weed killer is safe to use in farmlands, walkways, patios, and driveways and can effectively eliminate white clover, crabgrass, moss, and tough dandelions. And because it’s a non-selective herbicide, utmost care is necessary during application if you don’t want to harm nearby plants and shrubs. 

Gets rid of dandelions, clover, chickweed, thistle, general broadleaf
Dries out healthy grass
Four times stronger than most organic herbicide solutions
Certified for organic use

#5. Nature’s Avenger Organic Weed Killer Concentrate

Nature’s Avenger Organic Weed Killer Concentrate

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  • Active ingredient: 70% D-limonene (citrus oil)
  • Type: non-selective post-emergence herbicide
  • Action time: visible results in two hours
  • Formulation: concentrate
  • OMRI-listed

Citrus oil is already a potent all-natural active ingredient. Still, when an herbicide features 70% of it, you know it’s going to handle the toughest grasses and weeds without any problem. That’s what you get from Nature’s Avenger Weed Killer. It’s a strong and fast-acting concentrate that kills weeds quickly, but it is safe for you and the environment since it’s made from oranges and lemons. 

While some fast-acting organic weed killers show visible results overnight, this one will show you wilted weeds merely two hours from your application. The high concentration of citrus oil is especially effective in killing tough weeds on dry soil and hot days when it doesn’t require much to dehydrate them. You can apply this weed killer on seedlings to well-established weeds, although you might need several applications when trying to get rid of large tap-rooted pests like dandelions.

Doesn’t stain pavement, concrete, or brick
Can also kill surrounding plants when sprayed
Approved for use in organic gardening
Safe to use around children and pets
Kills weeds up to six inches long

#6. ECO Garden Pro Organic Vinegar Natural Weed Killer

ECO Garden Pro Organic Vinegar Natural Weed Killer

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  • Active ingredient: 8% acetic acid, 5% sodium chloride
  • Type: non-selective herbicide
  • Action time: within 24 hours
  • Formulation: ready-to-use solution
  • Safe for bees and groundwater

Another exceptionally safe solution for keeping your lawn free from unwanted grass and weeds is the ECO Garden Organic Weed Killer. It boasts a potent combination of 8% acetic acid and 5% sodium chloride. The figures may not sound much, but it provides everything you need to kill tough weeds like crabgrass and thistle in less than 24 hours. Using them on dandelions and clover may need some reapplication, especially when you’re trying to get rid of mature plants and overgrowth.

If you’re worried about potential health effects and the posing hazard to livestock, pets, and aquatic animals when using herbicides, that wouldn’t be a problem in this weed killer. It’s 100% organic, made from natural white vinegar, Himalayan rock salt, and plant activators. You can apply it anywhere you want to clear out weeds without worrying about harmful effects. 

Will not damage walkways, pathways, and concreteDoesn’t work well with dandelions and clover
Safe for pets, kids, fishes, bees, and livestock
100% all-natural and biodegradable
Kills weeds and grass on contact

#7. BioSafe Systems 7601-1 Organic Weed Killer Concentrate

BioSafe Systems 7601-1 Organic Weed Killer Concentrate

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  • Active ingredient: 40% ammonium nonanoate
  • Type: non-selective herbicide
  • Action time: works within minutes
  • Formulation: concentrate
  • OMRI-listed; EPA-registered

If you want a safe herbicide that can kill unwanted dandelions, bermudagrass, nimblewill, bittercress, and bentgrass, the BioSafe Systems 7601-1 Weed Killer Concentrate is your best bet. It’s a strong weed killer but is safe for people, pets, and the environment. It’s an effective weed control solution made with 40% ammonium nonanoate, but it’s 100% non-toxic. 

This herbicide is a non-selective weed killer and can get rid of everything it touches, a perfect solution to keep pool areas, parking areas, fence lines, foundations, and gravel areas spot-free. But more than that, it’s one of the fastest-acting all-natural weed killers in the market, working on drying out weeds within minutes from application. You’ll be sure to see signs of wilted or dead weeds within hours after spraying the infested spot.

This product is your best bet if you want to achieve a beautiful and healthy garden space within a few hours. You’ll also have more peace of mind to know that this solution doesn’t leave any toxic residue.

Shows visible results within 24 hours
It kills everything it touches
Prevents future weed regrowth
Kills weeds right to the roots
Organic-certified weed killer

#8. Organic Matters Natural Weed Killer Spray

Organic Matters Natural Weed Killer Spray

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  • Active ingredient: acetic acid, citrus, sodium
  • Type: non-selective herbicide
  • Action time: less than 24 hours
  • Formulation: ready-to-use solution
  • Best for use in driveways, barns, around flowerbeds, parking areas, pathways, water systems, foundations

If you want to kill over 250 different weed and grass species in the greenest way possible, the Organic Matters Weed Killer Spray is one of the best organic weed killers for the job. It features a 100% all-natural formulation made from safe organic ingredients like sodium, citrus, and acetic acid, three of the well-known natural active ingredients for herbicides.

This ready-to-use solution can eliminate crabgrass and dandelions from your walkways, driveways, and fence lines even though it doesn’t contain glyphosate. Plus, it comes with a heavy-duty sprayer, and once you start applying it to infected areas and leave it overnight, you’ll be pleased to find the best results.

Kills over 250 different grass and weed types
Can also kill plants
Safe around wildlife and pets
Contains no glyphosate
Includes a sprayer

#9. Natural Elements Weed Killer

Natural Elements Weed Killer

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  • Active ingredient: 5% sodium chloride, vinegar, sodium laurel sulfate
  • Type: non-selective herbicide
  • Action time: within 24 hours
  • Formulation: ready-to-use solution 
  • Best for use around gardens, lawns, landscaping, flowerbeds

The Natural Elements Weed Killer is one of the easiest and best organic weed killers to use. It comes in a spray bottle and with its ready-to-use formulation, you can get to spraying it on unwanted weeds right out of the box. 

It might not be the most affordable organic weed killer, but it’s among the best if you want ease-of-use and overnight results. You can use this product around gardens, flowerbeds, landscaping, and lawns to kill most grasses and broadleaf weeds. Its combination of active ingredients can kill both grass and weeds but remains safe and non-toxic to use around people, animals, and groundwater. It can ease your worry about using herbicides that can damage the habitat and potentially cause health concerns.

Effective against most broadleaf weeds and grasses
Expensive solution
Works fast in the hot season
Easy-to-use no-mix formula
Pet-friendly herbicide

#10. No products found.

No products found.

No products found.  



  • Active ingredient: 6% Eugenol
  • Type: non-selective broad-spectrum herbicide
  • Action time: 10-14 days
  • Formulation: water-soluble concentrate
  • WSDA certified

Weed Slayer Natural Weed Control concentrate is one of the best organic weed killers tough on various weeds and grasses but safe on humans, pets, livestock, and water. You can trust this all-natural herbicide to get the job done of clearing out your lawn from unwanted weeds, thanks to its potent 6% Eugenol or clove oil. It’s a much greener and safer alternative to using conventional herbicides that contains glyphosate that isn’t as environmentally-friendly. 

What’s even better is the pleasant smell you can get from this organic weed control solution, making it more palatable to use. The only downside about this product is it’s not a fast-acting weed killer like every option mentioned above. However, it doesn’t alter this weed control’s effectiveness against many weeds and grasses, although you may need to wait for ten to 14 days to see the best results.

Formulated with essential oils
Slow-acting herbicide
Certified for organic use
Kills weed roots
Pleasant smell

Best Organic Weed Killer – Natural Armor All-Natural Weed and Grass Killer

There are many weed killers available, but going organic in your yard is a lifesaver. All-natural weed killers are generally safe for everyone, except for unwanted weeds. When it comes to the best alternative to keeping a spot and weed-free lawn, our top pick is the weed and grass killer from Natural Armor. 

It’s a high-quality product that delivers top-quality results in the most convenient ready-to-use solution. It’s a spray-and-go weed control that gives you desired results overnight.

Best Organic Weed Killer Brands

If you’re looking for trusted brands of the best organic weed killers, check out our top three choices.

Natural Armor

By far, Natural Armor is our top favorite brands in terms of the best organic weed killers. It’s a family-owned and operated brand for all-natural products, including yard maintenance and weed control solutions. They create highly-effective weed control formulations with fast-acting properties that can show visible results in less than 24 hours.

Doctor Kirchner

Another favorite brand that offers a more environmentally-friendly solution in getting rid of pesky weeds and grass is Doctor Kirchner. The brand offers a solution against a wide range of weeds that kills them down to the roots without using harmful and toxic chemicals. It uses ocean saltwater and food-grade ingredients for a glyphosate-free and hormone-disrupting chemical-free non-selective weed killer. 


Bonide is a trusted brand since 1926, providing a wide range of solutions and products to handle pest problems at home, gardens, and lawns. It is especially famous as one of the industry leaders in lawn and garden care formulations, and its organic fast-acting weed and grass killer is only one of its stand-out products.

What to Consider When Buying Best Organic Weed Killers

Before investing any money on the best organic weed killers, it’s essential to ensure that it’s the correct one for your turf or garden. After all, no single weed killer will work for all yard problems and infestation. To make it more hassle-free for you to choose the best organic weed killers for the job, here are some essential factors you need to consider when choosing a product.

Intended Purpose

Before you but the best organic weed killers, it is important to determine your work scope or purpose of buying a product. Your current weed problems will determine which type of herbicide is best to use. For instance, you need to choose between a pre-emergent and a post-emergent weed killer.

If you want to prevent weed growth, a pre-emergent herbicide is your best bet. However, if you want to get rid of existing and thriving weeds, you’ll need to use a post-emergent weed and grass killer. 

Whether you choose a pre-emergent or post-emergent weed killer, the herbicide type will also affect the ideal time or season for application. For instance, pre-emergent treatments are best for use late in fall or early in spring, just before weeds start germinating or growing. Meanwhile, post-emergent control is best used during peak growing season to allow the chemicals to penetrate fully into the weed roots.

Ultimately, it all comes down to what weed problem you have at hand. 

Selective vs. Non-Selective

Another choice you have to make when buying weed killers is between a selective and non-selective herbicide. Selective weed killers will only destroy select weeds and grasses, while non-selective solutions can damage everything it touches. 

The primary takeaway about selectivity in weed killers is choosing the ideal solution to eliminate weeds and unwanted grass infesting your yard. 

However, you won’t have that many organic herbicide options as you would when using chemical-based weed killers. Most organic solutions are non-selective, which means they can dry out or even kill any grass, weed, or plant that it comes into contact with.

Primary Ingredient

Organic weed killers mostly work the same, but they have varying formulations using different active ingredients. Some of the common all-natural active ingredients in weed killers include D-limonene or citrus oil, vinegar, salt or sodium chloride, and Eugenol or clove oil. Each of them offers varying weed control capabilities, making it necessary to take the active ingredients in herbicide into account when buying the best organic weed killers.

Citrus oil is a widely-used natural weed killer, and a single spray of this ingredient will cause many weed types to wither away quickly. It has a potent acidity that can kill any plant it comes into contact with, so careful application is necessary when using citrus-based herbicides.

Vinegar is another natural weed killer with strong acidity, the primary reason it’s effective against many grass and weed types. Vinegar-based herbicides are also fast-acting solutions that should show visible results in less than 24 hours. The only downside with vinegar is it doesn’t kill the roots. It can only dry out the leaves, causing weed regrowth in several weeks.

Many organic weed killers also contain salt as an active ingredient. It’s effective in suppressing further weed growth by removing moisture and nutrients. This weed control method can also damage surrounding plants, making salt-based weed killers only best for spot treatments.

Lastly, you can find many all-natural weed killers with Eugenol, a clove essential oil, as the primary active ingredient. This type of herbicide is ideal for getting rid of above-ground parts of grasses and weed as clove oil easily causes cell-leakage resulting in dead leaves. In this case, however, it won’t be as effective in controlling weed types with bulbs, tubules, or rhizomes.

The key takeaway when choosing the ideal active ingredient in the best organic weed killers is to select one that can tackle the kind of weeds infesting your area.

Concentrate vs. Ready-to-Use

Choosing an herbicide formulation is primarily for your convenience when using the product. Concentrates require to get diluted in water before use, while some others may even need additional surfactants. 

Ready-to-use and pre-mixed products may look like they contain a lot, but they are mostly used in small yards. Meanwhile, concentrates are more cost-effective and suitable for use in larger yards, but it’s riskier and a hassle to use. 

Whether you select the best organic weed killers in ready-to-use or concentrate formulation, it’s important to consider the land coverage per pack or container. Also, choose the formulation that works best for you in terms of ease of use.

Non-Residual Herbicides

One of the best things about organic weed killers is they have non-residual effects, which means they don’t linger in the soil for a long time. They break down quickly and gets easily washed out soon after application. It means they don’t have lasting effects on the soil, which is both good and bad. 

The non-residual property of most all-natural weed killers doesn’t poison the soil or alter its properties. Still, it also doesn’t prevent new weeds from cropping up several days or weeks after application.


Spending money on weed killers that can’t get the job done is a waste of money. Before buying the best organic weed killers, ensure that it provides the level of effectiveness that you need to get rid of the toughest grass and weeds in your yard.

There’s no 100% solution to determine if an organic weed killer will be effective. However, studying its active ingredients will help rule out the best options. You can also check out reviews and ratings from industry professionals and legitimate customers. 


Although you’re dealing with the best organic weed killers and are made from all-natural and non-toxic ingredients, it’s still essential to consider safety during use and application. Before using a product, it’s critical to check out the components and formula for any possible irritants. 


Unwanted weeds and grasses can ruin the beauty of your otherwise well-manicured lawn. They stick out like a sore thumb and can be a challenge to get rid of. And while there are many conventional pesticides available to fight against pesky weeds, there are also tons of the best organic weed killers that offer much safer and environmentally-friendly solutions. Our best pick for the job is Natural Armor for its convenient application and potent formulation that delivers desired effects in less than 24 hours.

Still, there is no single organic weed killer for every yard and weed problem. Choosing the best organic weed killers will primarily depend on what you’re dealing with in your turf. Still, what’s good about the products we mentioned above is they deliver desirable results in the most eco-friendly way possible. Whether you choose one or the other, it’s important to figure out the best organic weed killers based on factors like your intended purpose, selectivity, ease-of-use, ingredients, effectiveness, and safety.

FAQs (Frequently Asked Questions)

How can you get rid of weeds organically?

There are two safe ways to get rid of weeds in your garden without using toxic and harmful chemicals. Firstly, you can take them out by hand, which can be a tiring process, especially if you’re dealing with countless weeds. Meanwhile, you can opt for all-natural weed killers that are safe to use around kids, pets, livestock and safer for the environment.

How long does it take for the vinegar to kill weeds?

Vinegar is a highly potent natural active ingredient that provides fast-acting properties. Applying vinegar or acetic acid containing herbicide can kill weeds less than 24 hours from application. However, it’ working time will primarily depend on the vinegar concentration used. Essentially, the higher amount of vinegar you use, the quicker it can kill weeds.

Is there any selective natural weed killer?

Most natural weed killers available are non-selective herbicides that can kill anything it comes into contact with.

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