8 Best Organic Weed Killers for Lawns And Garden 2021 (Reviews)

Organic weed killers for lawns and gardens. All gardeners desire to have weed-free lawns, flowerbeds, gardens, and yards. All homeowners do not want to use chemical weed killers due to their potential health effects.

Safer options for weed control are available to make the areas where children and pets play. High concentrations of some organic weed killers may pose a risk.

Every organic weed killers that title as non-selective, only kill all plant growth that it comes in contact with. Organic weed killers can be a useful tool when combined with other means of weed control. This is why you need the best natural weed killer.

In this article, we deeply research for information about organic weed killers. We have come up with this buying guide for organic weed killers users looking for the top organic weed killers. Check out our best organic weed killers ratings, comparison, pros, cons, and review, so you can make the purchasing decision faster and wiser.


Our Quick Overview

  1. Best Fast-Acting #1: Bonide Burnout Concentrate
  2. Best for Grass Herbicide: Natural Armor Weed and Grass Killer
  3. Best Overall #1: Green Gobbler Weed Killer Vinegar
  4. Best Vinegar Weed Killer: ECO Garden PRO
  5. Best Overall #2: Doctor Kirchner Natural Weed & Grass Killer
  6. Best Grass and Weed Control: Weed Slayer Safe Weed Killer Organic Herbicide
  7. Best Fast-Acting #2: Nature’s Avenger Organic Weed Killer Concentrate
  8. Best for Beginners: BioSafe Systems 7601-1 BioSafe Organic Weed Killer Concentrate

Our Top Picks

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Model  CapacityPriceRating
Bonide Burnout Concentrate, Fast Acting Organic Weed and Grass Killer For Lawns and Garden Natural Weed Killer1-gallon$8.3
Natural Armor Weed and Grass Killer All-Natural Concentrated Formula – Grass Herbicide Natural Weed Killer1-gallon$8.6
Green Gobbler Weed Killer Vinegar Natural and Organic Weed & Grass Killer1-gallon$8.9
ECO Garden PRO – Organic Vinegar Natural Weed Killer1-gallon$8.2
Doctor Kirchner Natural Weed & Grass Killer – Natural Herbicide Weed Killer For Lawns1-gallon$9.0
Weed Slayer Safe Weed Killer Organic Herbicide Natural Grass and Weed Control Natural Weed Killer1-gallon$
Nature’s Avenger Organic Weed Killer Concentrate – Natural Herbicide Broadleaf Herbicide For Lawns Natural Weed Killer1-gallon$8.0
BioSafe Systems 7601-1 BioSafe Organic Weed Killer Concentrate – Safe Weed Killer Broadleaf Herbicide For Lawns Natural Herbicide Natural Weed Killer1-gallon$7.9

The advantage of not using chemical weed killers

  • Organic weed killer is safer compared to chemical weed killer. If you notice the warnings on every chemical weed killer or herbicide, that means there are reasons for these. You must wear protective gear and very careful when applying. You do not have to worry when you use an organic weed killer that is safe for application. Organic weed killer is safe for humans, pets, wildlife, or water. You should use the best natural weed killer.
  • Chemical herbicides can be expensive. You can use cheaper household vinegar for weed killers. Household vinegar is a natural and safe alternative for killing weeds. Vinegar will not harm humans, pets, or wildlife. Acetic acid is the ingredient in vinegar that kills and moisture out weeds organically. However, you must be careful not to touch another surrounding plant. It might end up killing them too.
  • Organic weed control can suppress weed growth. It can promote optimal soil health. If you use biologically-based compost and fertilizers, compost can aid suppress weed growth by eliminating weed seeds. A healthy soil automatically stimulates plant growth that can outcompete weeds.
  • Organic weed control can make your lawn better. One thing for sure is that a healthy and thick lawn can be annoying to weeds. Limited space will limit weeds’ ability to thrive and grow. You can fertilize and mow your lawn to prevent weeds to germinate. There is no one way to kill all kinds of weeds.

Factors to consider when purchasing an organic weed killer


Organic Weed Killers Reviews

We researched online to put together the top organic weed killers available on the market today. Combining mostly on consumer reviews and product information, we recommend our favorite products.


Best Fast-Acting #1

Bonide Burnout Concentrate

Best organic weed killer
Buy At Amazon

Average Ratings: 8.3

  • Easy to spread: 8.5
  • Easy to use: 8.0
  • Effectiveness 8.5

Our tips

  • This Bonide organic weed killer for lawns and gardens is very recommended to apply made by Bonide. When applied, this weed killer can kill in just a few hours numerous grassy weeds and broadleaf plants.
  • Be careful when you are applying the organic weed killer, you make sure to follow included instructions for details on how to kill any type of plant. You will discover that this organic weed killer is waterproof and keeps working even when it dries. You do not have to worry about re-applying the weed killer when the unfriendly weather turns later.
  • In as low as forty-two degrees Fahrenheit, you still can apply the weed killer. You can be sure to apply the organic weed killer around school grounds, borders, driveway, and around established trees because it is safe to use.
  • For application, mix three parts of water with one part organic weed killer. To mix them correctly, you can use the measuring cup included. When the measuring is right, apply using a spray bottle. It works fast and has a great odor using clove oil and citric acid. It is one of the best weed killers for lawns and the best natural weed killer.

Features that we like

  • Fast-acting grass and weed killer
  • Safe to use on Driveway, Landscape Bed, Lawn
  • Can Controls Broad Leaf
  • Can Kill Common Weeds
  • Systemic
  • Post-Emergent
  • Citric Acid

Why we like it (Pros)

  • The formula can kill weeds in a matter of hours
  • An excellent alternative solution to synthetic weed and grass killers
  • Pet-friendly weed killer
  • It is easy to use

Why we do not like it (Cons)

  • May not work on certain weeds
  • May not work properly as expected
GTIN or UPC037321074649
Coverage Area1,500 square feet
Active IngredientsCitric Acid
Weed TypeBroadleaf Signal Grass, Cinquefoil, Dandelion, Lambsquarters, Orchardgrass, Quackgrass, Ragweed, Wild Carrot
OrganicNon-organic
ContactSystemic
Area of UseDriveway, landscape bed, lawn
Container Size128 oz

Best for Grass Herbicide

Natural Armor Weed and Grass Killer All-Natural Concentrated Formula

Natural weed killer
Buy At Amazon

Average Ratings: 8.6

  • Easy to spread: 8.5
  • Easy to use: 8.7
  • Effectiveness 8.7

Our tips

  • Why did we recommend this organic weed killer? This is a weed killer for lawns product by Natural Armor that can handle more than two-hundred-fifty types of weeds and grasses. The grass herbicide does not contain glyphosate, and it is chemical-free.
  • It means that this grass herbicide product is safe and environmentally friendly because of the natural ingredients. You can be sure that the grass herbicide is safe to apply this organic weed killer in areas where there are pets, humans, fish, birds, and groundwater.
  • The great thing about this product is that you do not need to mix or dilute anything because it is ready to use with the bottle sprayer. After applying, in just a few hours or as long as 24 hours, you will see the results. If you are not satisfied with the result, it comes with a 100% money-back guarantee. The Natural Armor will give you a hassle-free refund and it is one of the best weed killers for lawns and the best natural weed killer.

Features that we like

  • Can kill 250+ types of weeds and grasses
  • Ready to use
  • Any location where there is no vegetation
  • See results in 24 hours

Why we like it (Pros)

  • You will not have trouble diluting and mixing
  • Easy to use
  • Effective organic weed killer
  • Pet-friendly formula

Why we do not like it (Cons)

  • May produce slight odor
GTIN or UPC023632039996
Coverage Area1,500 square feet
Active IngredientsNatural without Glyphosate
Weed Type250+ Types of Weeds and Grasses
OrganicOrganic
Contact
Area of UseAround Flower Beds, Shrubs and Trees, Barns, Driveways, Edging, Fence Lines, Foundations, Gravel Areas, Mulch Beds, Overgrown Weed Areas, Parking Areas, Patios, Pavers, Pool Areas, Rock Walls and Pathways, Walkways, Wells And Water Systems
Container Size128 oz

Best Overall #1

Green Gobbler Weed Killer Vinegar Natural and Organic Weed & Grass Killer

Non toxic weed killer Green Gobbler Weed Killer Vinegar Natural and Organic Weed & Grass Killer
Buy At Amazon

Average Ratings: 8.9

  • Easy to spread: 9.0
  • Easy to use: 8.5
  • Effectiveness 8.9

Our tips

  • Fast Acting Weed Killer. This organic weed killer for lawns from Green Gobbler Weed Killer is a fast-acting killer. The Green Gobbler weed killer product can kill weeds in twenty-four hours or even less.
  • Chemical Free Weed Killer. This liquid herbicide or liquid weed killer is chemical-free, with the main ingredient is acetic acid. The acetic acid is derived from corn.
  • Stronger Than Table Vinegar. All treatments of acetic acid can give excellent control of crabgrass and broadleaf plantain, without re-growth of these weeds within the thirteen weeks. Acetic acid is four times stronger than the similar material used in table vinegar.
  • Effective Control. A study showed that acetic acid is a very useful herbicide. Acetic acid at 5% concentration can give short-term control of common perennial weeds but entirely effective in controlling plantain and crabgrass. It is also effective against white clover, moss, and dandelions.
  • Organic Weed Killer. The liquid organic weed killer for lawns product is certified organic so you can apply them for agriculture or residential. You do not have to worry when using the Green Gobbler weed killer in farmlands, driveways, or mulch beds.
  • Comes with Sprayer. An included sprayer can be used during a no windy sunny day and add surfactant for better a result. Last but not least, if you are not satisfied with the result, you can return the product and Green Gobbler will be happy to refund your money. That is why it is one of the best weed killer for lawns and the best natural weed killer.

Features that we like

  • Organic 20% RTU Liquid Vinegar
  • Ready to use and post-emergent
  • Safer alternative
  • Kills all Types of weeds including Dandelion
  • Certified for organic
  • With trigger sprayer
  • Powerful, and effective solution
  • Price: under $50

Why we like it (Pros)

  • Get rid of any type of weed or grass in hours
  • Zero toxic chemicals
  • Eliminates herbaceous perennial weeds and grasses
  • Free of dyes, chloride, sulphates, or bleach
  • No glyphosate

Why we do not like it (Cons)

  • May be harmful to birds or pets
  • The quality is just average
GTIN or UPC859501007540
Coverage Area200 ft²
Active IngredientsOrganic Acid
Weed TypeCrabgrass, Poison Ivy, Wild Garlic, Wiregrass
OrganicOrganic
ContactYes
Area of UseAll Purpose
Container Size128 oz

Best Vinegar Weed Killer

ECO Garden PRO

Organic weed killer for lawn
Buy At Amazon

Average Ratings: 8.2

  • Easy to spread: 8.5
  • Easy to use: 8.0
  • Effectiveness 8.2

Our tips

  • Environmental Friendly. If you are worried about weed killer might get in touch and hazardous to pets, kids, bees, livestock, and fish, this formulated organic weed killer for lawns from Eco Garden Solutions can give you relief. The weed killer for lawns product has the selected ingredients to be safe and environmentally friendly.
  • Natural Ingredients. With natural ingredients such as co-factors, Himalayan rock salt, plant activators, and natural white vinegar, you can apply this product to kill weeds anywhere. You can eliminate thistle, white clover, clover, dandelion, and crabgrass, and much more.
  • Provide Refund. Eco Garden Solutions is a great company that will give a refund if you are not satisfied with the product.

Features that we like

  • CloverPoison Ivy, moss killer
  • Safe for ground water
  • 100% Biodegradable
  • Phosphate Free
  • Eco Friendly

Why we like it (Pros)

  • Animal and humans-safe herbicide
  • An efficient natural herbicide
  • Can get rid of grass and weed fast in 48 hours

Why we do not like it (Cons)

  • None so far
GTIN or UPC628250836127
Active IngredientsOrganic Acid
Weed TypeDandelions, clover, chickweed, dollar weed, thistle, crabgrass, moss, white cover, grasses, weeds
OrganicOrganic
ContactYes
Area of UseAll Purpose
Container Size3.78 liter

Best Overall #2

Doctor Kirchner Natural Weed & Grass Killer

Organic weed and feed Doctor Kirchner Natural Weed & Grass Killer - Natural Herbicide Weed Killer For Lawns
Buy At Amazon

Average Ratings: 9.0

  • Easy to spread: 9.0
  • Easy to use: 9.2
  • Effectiveness 9.0

Our tips

  • Ready to Use. When you purchase this organic weed killer for lawns from Doctor Kirchner, you do not have to dilute or mix anything. All you have to do is to pour the liquid weed killer into your spray bottle.
  • Does not harm the Environment. Once you apply the weed killer for lawns, it will not damage or harm the environment because the liquid weed killer contains vinegar, soap, and saltwater. These ingredients are effective and powerful enough to handle weeds.
  • Pet-friendly Weed Killer. The weed killer for lawns is a completely safe weed killer for pets and humans when used as directed. It is a pet-friendly weed killer. Spray onto the weeds until they are saturated. Next, you wait for the result in twelve to twenty-four hours. You should buy a large bottle because it has a long shelf life.

Features that we like

  • Safe for the environment, human, and pets
  • Simple to use
  • Fast-acting weed killer in hours, grassy weeds 12-24 hours to kill
  • Last for years
  • Sustainable weed killer
  • Kill 250+ common weeds and grasses
  • Does not affect groundwater or soil health
  • Non selective ready to spray

Why we like it (Pros)

  • Very easy to use
  • Ready to spray
  • Users do not have to mix
  • Efficient, natural, and multiple weight option weed killer

Why we do not like it (Cons)

  • Need to be careful because it may spill
GTIN or UPC680611915377
Active IngredientsOcean salt water, commercial strength food grade vinegar and soap
Weed Type250+ common weeds and grasses
OrganicOrganic
ContactYes
Area of UseCement and pavers, flower and mulch beds, crop beds, parking lots, farmlands
Container Size32 fl oz

Best Grass and Weed Control

Weed Slayer Safe Weed Killer

  • Safe. This organic weed killer is a safe weed killer for lawns product does not contain glyphosate, so it is safe for the environment or the family. The Weed Slayer is a formula made from a plant-based herbicide. The ingredients include clove essential oil called eugenol which is a natural herbicide.
  • Ingredient. Eugenol is extracted from leaves, stems, and dried flower buds of the clove tree (Eugenia Aromaticum). Eugenol is great for agricultural purposes because of its powerful and natural insecticidal, herbicidal, and fungicidal properties. It is called green herbicide. It is very useful for killing weeds.
  • Application. The organic weed killer product comes with a quart of AgroGold. Dilute the two solutions in the same quantity and mix them with water. You can read the manual instructions for detailed specifications.
  • Pleasant Smell. You will like this product of its pleasant smell from the essential oils when applying it. It is not a fast-acting product but gets the job done, safe, and effective when applied properly.

Best Fast-Acting #2

Nature’s Avenger Organic Weed Killer Concentrate

Nature's Avenger Organic Weed Killer Concentrate - Natural Herbicide Broadleaf Herbicide For Lawns Natural Weed Killer
Buy At Amazon

Average Ratings: 8.0

  • Easy to spread: 8.5
  • Easy to use: 7.8
  • Effectiveness 7.8

Our tips

  • Fast-acting Weed Killer. This Avenger weed killer concentrate product is a fast-acting and environmentally safe herbicide for lawns. It is a post-emergence and non-selective herbicide that is made from lemons and oranges. It is a safe weed killer.
  • Ingredient. The grass herbicide product is effective in killing broadleaves, weeds, and grasses. The main ingredient, citrus oil is most effective when used on hot days with dry soil.
  • Result in 2 Hours. The broadleaf herbicide for lawns works by taking away the cuticle of the weeds, so the plant is dehydrated and then killed. After the application, you will see results in about two hours.
  • Safe for Pets and Humans. Because of its organic ingredient, the grass herbicide is safe for humans, wildlife, and pets. If you are targeting a matured and large taprooted weeds like dandelions, you may require to apply several applications to kill them.

Features that we like

  • Non-selective
  • Post-emergence herbicide
  • Kills weeds, grasses and broadleaves
  • Approved by the U.S. Department of Agriculture’s (USDA) National Organic Program (NOP) rule
  • Independent and university testing results prove that Avenger Weed Killer is as effective

Why we like it (Pros)

  • Get rid of weeds organically with visible between 1 to 2 hours
  • Works well in cloudy and cool
  • Highly biodegradable disperse and break fast

Why we do not like it (Cons)

  • Price: above $50
GTIN or UPC859177001040
Coverage Area2,000 square feet
Active IngredientsD-limonene (citrus oil)
Weed TypeAnnual Bluegrass, Bermuda Grass, Bindweed, Black Clover, Broom Sedge, Bur Clover, Common Burdock, Dandelion, Dwarf Dandelion, English Lawn Daisy, Indian Chickweed, Lambsquarters, Mallow, Ragweed, Spurge
OrganicOrganic
ContactYes
Area of UseGarden, Landscape Bed, Lawn
Container Size1 gallon

Best for Beginners

BioSafe Systems 7601-1 BioSafe Organic Weed Killer Concentrate

Natural herbicide
Buy At Walmart

Average Ratings: 7.9

  • Easy to spread: 8.2
  • Easy to use: 7.8
  • Effectiveness 7.8

Our tips

  • Result in 2 Hours. You can expect to see the result in just two hours when you apply this organic weed killer from Biosafe System. In as soon as two hours, broadleaf weed, ragweed, dandelions, liverwort, spurge, and crabgrass will be killed.
  • Safe to Use. If you already planted cultivated plants, they will not be harmed after applying this organic weed killer. The area is clear for new planting after four days of this organic weed killer application product.
  • Warm Weather. You will get a maximum result if you apply this product on little wet weeds from dew or rain. This broadleaf herbicide for lawns works better during summer months or warm weather. It is a safe weed killer!

Features that we like

  • The perfect choice for beginners
  • Easy to use
  • OMRI, EPA approved

Why we like it (Pros)

  • Visible results between 5 to 6 hours
  • Destroying the cells of weeds naturally
  • Does not leave any residue
  • Beginners can replant four days after application
  • Water-soluble herbicide
  • Humans, animal friendly weed killer and the environment

Why we do not like it (Cons)

  • Can kill fish and bees
GTIN or UPC617407728460
Coverage Area
Active IngredientsAmmonium Nonanoate
Weed TypeChickweed, Crabgrass, Dandelions, Ragweed, Liverwort, Algae, Moss, Bittercress, Mustards, Pigweed, Moneywort, Spurge, Velvet Leaf, Bentgrass, Bluegrass, Nimblewill
Ryegrass, Bermudagrass
OrganicOrganic
ContactYes
Area of UseGarden, Landscape
Container Size1 gallon

What are organic weed killer ingredients?

Citrus oil or d-limonene

Citrus oil is a natural weed killer. Spray weeds with citrus oil and weeds will shrivel away fast. Because of the acidic nature of Citrus oil, it will kill any plant. Be careful when applying and do not spray your cultivated plants or flowers.


Surfactant

Surfactants help herbicides do the job better, so you need to add a surfactant to your weed killer mix. A surfactant is a soluble compound that decreases interfacial tension between a solid and liquid or two liquids.

It is a linear molecule that attracted to water and repelled by water. Surfactants were forming a surface between the air and fluid with the hydrophobic heads in the fluid and tails in the air.

If you are killing brush, unwanted grass, or weeds, it is very important in the herbicide mix because most water is hard. Hard water will roll-off leaf surfaces.

If you mix up a broadleaf weed killer solution and spray it on a thistle, the water beads up and rolls right off the leaves. But if you add a surfactant, you will see a sheen on the leaf surface. The herbicide is sticking to the leaf, and it is doing a better job.

Add dish soap to the mix. Add about one tablespoon per gallon of spray. Even if a herbicide product says it contains a surfactant, it is recommended to add more surfactant. It is cheap such as Dawn, Palmolive, Lux, and Dial dish soap.

Clove oil or Eugenol

Eugenol is a compound derived from clove essential oil. This compound is the most used ingredient in organic weed killers in the market today. The clove oil kills the outside of the leaves of weed that result in cell leakage and the end, causing death.

Eugenol is good at eliminating the above-ground parts of weed. It may not work effectively against weeds with rhizomes, tubules, and bulbs.

You can spot spray using clove oil on walkways or building edges.

Salt

If you are trying to grow plants alongside the beach because the plant will not have enough nutrients and nutrients. This is because salt or the saltwater will remove those needed nutrients and moisture.

That is why some organic weed killer has salt as its main ingredients. Salt will dry out the surrounding soil areas of weeds.

Because salt can also kill other cultivated plants, it is best to spot spray weeds. Other method is to apply organic weed killer that contains salt along roads, sidewalks, and walkways. Make sure there are no other plant nearby when applying organic weed killer that contains salt.

Vinegar

Many people use vinegar as a weed killer. This is because vinegar is so acidic that it will work on the leaves of weeds causing it to turn to brown.

The application should show a result within 24 hours. However, weeds may appear in a few weeks because vinegar only destroy the leaves.

To kill the weed entirely, you might have to re-apply vinegar to the weeds. To get to the root, you might need a high concentration of vinegar to succeed.

Vinegar may also make the surrounding soil acidic, and you can solve this problem by using water to rinse the acidic soil.


Frequently ask question

Are organic weed killers safe?

You might think that because weed killers are organic they are consider to be safe. It is true. Organic weed killer have a way of breakdown quickly in the environment. While chemical weed killers have a long residual life in a plant or the soil.


How do organic weed killers work?

Since they contact weed killers, they have to entirely cover the plant with spray. The organic components of organic weed killers eliminate the damage cell wall or the waxy plant cuticle causing the weed to dry out or lose too much water and will eventually die.


How long does it take for weeds to die after spraying with vinegar?

It may take two days to kill the weeds with a lower concentration of vinegar, but they will die. With a higher concentration of vinegar, weed could die within 24 hours.


Does baking soda kill weeds?

Household baking soda, with sodium bicarbonate as ingredient, can have a role as a herbicide on weeds. Baking soda draw water out of plant cells. When the cell lose water, the foliage will dry out.


How do you control weeds organically?

  • Flame weeders
  • Apply Vinegar
  • Apply Corn gluten
  • Vodka
  • Irrigate and fertilize the plant properly
  • Boiling water
  • Limit digging and tiling
  • Solarizing
  • Mulching
  • Crowding
  • Apply Borax
  • Straw
  • Apply rubbing alcohol

Which is better, spraying weeds or pulling weeds?

If you pull weeds, do this after a rain or when the soil is moist and damp. Weeds will come out of the ground easily. If you spray, use enough concentration ingredient to eliminate the weed to ensure weed does not re-appear.


Our word of advice

There’s a lot of factors to consider purchasing the best organic weed killer. There are many organic weed killer products in the market today.

Organic weed killers does not use toxic ingredients. Some products work within hours. Work fast and effectively without harming the environment.

Be sure to use organic weed killers or the best natural weed killer instead of chemical weed killers! It is a safe weed killer!


8 Best Organic Weed Killers for Lawns And Garden 2021 (Reviews)
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