Best Weed Killers in 2020


With the many types of weed control formulations on the market, choosing the right one for your weed control needs can be challenging. Acquiring information on what to look for in a weed killer or preventer helps to make the purchase process easier.

In this review of best weed killers in 2020, we explore 10 top-ranking weed control formulations. All the weed killers are verified best sellers and you’d get tremendous value from any of them. However, each weed killer in the list works differently, so you have to select the one that best fits your needs.

How about starting with understanding the different types/categories of weed killers in existence?

Categories of weed killers

    1. Selective vs. non-selective: Selective weed killers act on specific weeds while leaving untargeted plants untouched. On the other hand, non-selective formulations destroy any plant with which it comes into contact. If you want to get rid of weeds that have grown amongst other vegetation, a selective weed killer is the better option. But if you want to clear everything out, a non-selective weed killer will do the job.
    2. Organic vs. inorganic: Natural or organic weed killers are made out of natural ingredients and do not contain chemicals that might cause harm to plants and human health or damage the soil. Inorganic weed killers are manufactured using chemicals such as Glyphosate and Triclopyr. These chemicals may have negative effects on the soil if used repeatedly for a long period.
    3. Contact vs. systematic: Contact weed killers destroy plants on contact, but they do not infiltrate the root system. This is unlike systematic formulations that can travel through the foliage to destroy the plant’s root system.
    4. Emergent and pre-emergent: An emergent formula only works on plants that have sprouted, so it cannot prevent seeds that are yet to germinate. Pre-emergent weed killers prevent weed seeds from germinating. Thus, they are preferred when the user wants to maintain a completely weed-free surface.

Other important factors to consider when buying the best weed killer

  • Can the weed killer be used around edibles?
  • How long does the formulation take to show results?
  • How much area can the solution cover?
  • Does the weed killer have residual effects, that is, does it affect the soil or environment in any way?
  • How long should the area remain closed for entry after applying the formulation?
  • For how long will the weed killer be active? When should it be reapplied?

Best Weed Killers in 2020

Let’s now review in detail each of the 10 top-performing weed killers on the market.

Last update on 2020-09-29 / Affiliate links / Images from Amazon Product Advertising API

1. RM43 43-Percent Glyphosate Plus Weed Preventer – Best Overall

1. RM43 43-Percent Glyphosate Plus Weed Preventer – Best Overall

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One spray of the RM43 Glyphosate Plus will keep your garden free from unwanted plants for up to a year. The formula is a combination of a surfactant and two herbicides. It acts fast to show results in just two hours. In addition, it is a very user-friendly weed killer with no entry restrictions. One gallon of the solution can treat up to 17297 sq. ft.

Features of RM43 weed preventer

  • Ideal for total vegetation control where no growth is desired
  • Can also work as spot control of unwanted plants
  • Kills up to 250 types of weeds
  • Terminates the growth of root systems
  • Rainproof in one hour

Why buy this weed preventer?

You can spray the RM43 anywhere you want to stop growth totally. The high concentration of weed-killing chemicals in this weed killer makes it effective against the most stubborn grasses, weeds, vines, brush, and trees. Some people spray it on bare ground to prevent plants from germinating.

2. Compare-N-Save 016869 – Runner up

2. Compare-N-Save 016869 – Runner up

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Are you planning to restore your lawn, prepare your garden, or control plantation along driveways and walkways? Compare-N-Save 016869 is a powerful grass and weed killer that obliterates all annual and perennial plants and grasses. This solution can even be used as a stump treatment – just in case you are wondering how strong it is.

For best results, spray the 016869 during the day when temperatures are above 60°F.

Highlights of Compare-N-Save 016869

  • Concentrated grass and weed killer with 41% Glyphosate
  • Comes as a ready-to-use spray
  • Visible results within 2 to 4 days
  • Kills all weeds and grass to the roots
  • Spray is rainproof in 2 hours

Reasons to buy the 016869

Compare-N-Save 016869 will sweep clean any plants in the entire area of application. If you have weeds that have been disturbing you for as long as you can remember, this weed killer goes down to the roots. It kills both annual and perennial plants.

3. Preen 2464083 Garden Weed Preventer

3. Preen 2464083 Garden Weed Preventer

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If you have vegetable and flower gardens where you need to control weeds, this Preen weed preventer is an ideal solution. It prevents the germination of seeds for up to three months. You simply spread the solution on bedding areas, water in, and rest assured that no weeds are going to germinate for the next three months. Note carefully that this weed preventer doesn’t kill weeds that have already germinated. So, you have to remove existing grasses and weeds before applying the solution.

Features of Preen 2464083 Garden Weed Preventer

  • It can be used during any season
  • Blocks the germination of common broadleaf garden weeds, including chickweed, purslane, thistle, and knotweed, as well as grassy garden weeds like foxtail, bluegrass, and crabgrass
  • Safe to use on gardens with edibles
  • Doesn’t affect existing plants
  • One application stops weeds growth for up to 3 months
  • Covers 5000 square feet

Reasons to buy Preen 2464083

This weed preventer allows you to avoid the difficult work of hand-weeding by killing weeds before they come out of the soil. It’s ideal for weed control around established plants, and it can be used at any time throughout the growing season. With Preen 2464083, you can maintain weed-free beds throughout the year as long as you apply it every nine to twelve months.

4. Roundup Weed & Grass Killer Concentrate Plus – Best Non-selective weed killer

4. Roundup Weed & Grass Killer Concentrate Plus – Best Non-selective weed killer

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If you want to make a quick attack on weed and grass, this Roundup weed killer will do it for you. It is a super-fast killer that shows results in 12 hours. Through FastAct Technology, this contact and systematic herbicide attack the weed’s surface while also infiltrating the roots. Thus, further weed growth and spread is stopped instantly.

Features of Roundup Concentrate Plus weed killer

  • Completely wilts weeds in 1 to 2 weeks
  • Rainproof in 30 minutes
  • Super quick action on weed leaves and roots
  • Ideal for large areas especially when applied using a Roundup-branded tank sprayer
  • Kills the toughest weeds to the root
  • Usable around shrubs, flowers, and trees, but NOT SAFE around edibles

Why choose this weed and grass killer

This is a strong weed blaster from a trusted brand. It should make your plot preparation tasks easier and quicker. It’s also an economical way of maintaining drive-ways and walk paths clean and attractive. Above everything else, users love the quick action of the weed killer.

5. Green Gobbler Organic Weed & Grass Killer – Best natural weed killer

5. Green Gobbler Organic Weed & Grass Killer – Best natural weed killer

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Here’s a highly-rated organic weed and grass killer that will keep your property free of stubborn weeds. Distinctively, this glyphosate-free herbicide is made from corn and 20% vinegar. Besides, it is approved by the OMRI. The herbicide allows you to control weeds without using dangerous chemicals.

Features of Green Gobbler herbicide

  • Environmental-friendly herbicide
  • It’s the fastest natural weed killer
  • Eliminates broadleaf weeds on contact
  • Non-selective formula; it shouldn’t be sprayed on plants whose growth is desired
  • Safe for use anywhere – on residential, agricultural, and industrial property

Reasons to buy this natural weed killer

The greatest reason for choosing this weed and grass killer is perhaps its organic formulation. It eliminates weeds and unwanted grasses without introducing toxic chemicals to the environment. Weeds and grass on your driveways, sidewalks, parking lots, mulch beds, pavers, flower beds, farmlands, or barns will no longer be a headache when you have this Green Gobbler weed killer.

6. Spectracide Weed & Grass Killer2

6. Spectracide Weed & Grass Killer2

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Spectracide is a well-known brand for cutting-edge solutions to lawn insects, diseases, and weeds. The Killer2 weed and grass killer comes in pre-mixed and ready to use around walkways, patios, and flower beds. It is one of the fastest solutions for complete removal of grasses and weeds.

Features of Spectracide weed & grass killer 2

  • Rainproof in 15 minutes
  • You can plant new trees, shrubs, or flowers one day after spraying
  • Kills weeds to their roots
  • Entry restrictions apply until the spray is dry
  • A 3-hour wait for visible results

Reasons to buy Spectracide weed & grass killer 2

The power of Spectracide Weed & Grass Killer2 is magical. It makes maintaining your landscape significantly easy and enjoyable. However, it is not ideal for spot treating as anything you spray will die. Also noteworthy, pets and humans aren’t allowed to step into the sprayed area until the spray has dried.

7. Southern Ag Amine 24-D Weed Killer

7. Southern Ag Amine 24-D Weed Killer

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This selective weed killer acts mercilessly on a wide variety of broadleaf weeds, all the while leaving your lovely grass to flourish. If weeds such as poison ivy, dandelion, clover, and chickweed have invaded your garden, one bottle of Southern Ag Amine will have them gone sooner than later.

Southern Ag Amine 24-D Weed Killer Highlights

  • Contains 46 per cent Ag 2,4-D Amine; makes it a highly concentrated herbicide
  • Works as a pre- and post-emergent herbicide
  • Effectively controls broadleaf weeds and woody plants
  • A 32 oz. bottle can cover 20,000 square feet
  • Doesn’t harm grasses such as St. Augustine grass

Reasons to choose this herbicide

A highly potent and effective formula, the Southern Ag herbicide is the best selective weed killer on the market. It’s very economical and easy to use. Buy this herbicide with confidence that the frustrating weeds will be gone, leaving your beautiful lawn grass to grow and glow in all glamor.

8. PBI/Gordon 652400: Best weed killer for safety and environmental friendliness

8. PBI Gordon 652400- Best weed killer for safety and environmental friendliness

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It’s not always easy to find a highly potent weed killer that’s also environmentally safe. PBI/Gordon is a unique formulation that uses ingredients that are not only safer for the environment but also for your pets and children. Moreover, it is designed for cool weather effectiveness, making it one of the best solutions for weed control during cold seasons.

Features of PBI/Gordon 652400

  • Kills over 100 weeds species
  • Environmentally safe ingredients
  • Starts showing results in a few hours and complete results in 2 weeks
  • Cool-weather performer
  • Doesn’t harm lawn grass
  • Comes pre-mixed and ready to use

Why buy this weed killer

Many herbicides are ineffective during the cold season. However, the PBI/Gordon 652400 Speed Zone is different, in that it’s taken up quickly thanks to its cool-weather formulation. So, if there are weeds infecting your vegetation at any time of the year, this weed killer will help you get rid of them completely.  The use of safe and environmentally-friendly ingredients in the formulation is also a big plus for the weed killer.

9. Remedy Ultra Specialty Herbicide

9. Remedy Ultra Specialty Herbicide

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The Remedy Ultra Specialty Herbicide destroys tough weeds the likes of English Ivy, mesquite, privet, and wildflowers. It’s a specialized oil-soluble formula that has been proven to deliver consistent results in both residential and commercial applications. As a result, the herbicide is ideal for weed and brush control along fence lines and on pasture and rangeland.

Features of Remedy Ultra Specialty Herbicide

  • 60 % Triclopyr concentration
  • Can control more than 35 brush species
  • Low-odor
  • Works perfectly on woody plants
  • Usable alone or mixed with Grazon

Why buy this weed killer?

This fast-acting weed control herbicide is ideal for getting rid of annuals perennials and woody plants. It’s super easy to use. Just dilute 2oz. of the herbicide in one gallon of water, wet the foliage, and wait for the toughest weeds to start wilting. It’s also long-lasting, which makes it a great choice for maintaining fences, pasture restoration, and general brush and encroaching brush control. A crucial aspect to note is that the herbicide is safe for pets and children.

 10. Doctor Kirchner Natural Weed & Grass Killer

10. Doctor Kirchner Natural Weed & Grass Killer

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If you are keen on using a natural herbicide, this all-natural weed killer by Doctor Kirchner will impress you. It’s made entirely from food-grade vinegar, soap, and ocean saltwater. Unlike inorganic weed killers that might contain harmful chemicals, this herbicide doesn’t affect your plants or add toxic substances to your soil.

Features of Doctor Kirchner natural weed killer

  • Non-selective, all-natural formulation
  • Can disintegrate weeds
  • The comfortable light vinegar smell
  • Ready-to-spray solution

Reasons to buy this herbicide

In addition to offering you the advantages of an all-natural, non-toxic, and easy-to-use herbicide, this Doctor Kirchner herbicide fully disintegrates all weeds within hours. Thus, you don’t have to worry about the extra work of removing dead weeds from your garden. It’s important to note, however, that the herbicide in non-selective. Thus it cannot be used on the lawn as it will destroy everything in its way.

Final word

Weeds and other unwanted vegetation should not be difficult to deal with as long as you have the appropriate weed killer. The weed preventers and killers we’ve reviewed above are of different kinds. Make sure to read carefully the manufacturer’s usage indications on the package of your desired weed control formulation. Particularly, it is inherent to understand all indicated safety precautions related to using any weed killer.

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