10 Best Weed Killers for Flower Beds – Make Your Garden Look Beautiful!

Last updated: Apr 07, 2020
42 Models Considered
61 Hours of Research
8 Experts Interviewed
179 Reviews Analyzed

If you are wondering how to get rid of unwanted weeds, then you’re not alone. Weeds are ugly, and they can take valuable nutrients away from your plants. This can especially be a problem for flower beds as you want them to look as pretty as possible. The answer to your problems is in getting the best weed killer for flower beds.

To make this as easy as possible, we’ve examined 42 different products by spending countless hours on research and compiled a list of the 10 best weed killers for flower beds. In our search, we found the Compare-N-Save Concentrate Grass and Weed Killer to be our favorite. It’s easy to use and gives you incredible results quite fast. It could be, however, that you’re looking for something a little different, which is why we have included 9 other great options here.

Top 10 Weed Killers for Flower Beds Review 2020

What makes the best weed killer for flower beds? Well, you have to consider the active ingredients, what types of weeds its most effective against, the consumption, size, shelf life, and other features, such as waterproofing and application. There is a lot to think about, which is why we’ve consulted several expert sources to give you the right information. We’ve broken this down into a comparison table and extensive product reviews along with our buying guide and FAQs. So, without further delay, let’s find the best weed killer for your needs!

Editor's Choice

This fantastic weed killer for flower beds works very quickly and lasts for long periods. This 1-gallon 41% glyphosate solution is able to cover up to 25,500 square feet of area.

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9.9
Best Value

If you are looking for a cheaper glyphosate-based concentrate, we recommend this product with a double-surfactant formula that dries on plants fast. Moreover, it becomes rainproof within a couple of hours.

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9.8
Best Long-term Performance

For longer performance, we recommend this weed killer for flower beds. It ensures visible results in three hours and prevents weeds from appearing for up to five months.

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9.6
Best Natural Weed Killer

An amazing natural weed killer that comes with a sprayer for simpler applications. It provides full desiccation in less than 24 hours and can be used in a wide range of areas.

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9.5
Best Rain Resistance

With this fantastic product, you won’t have to worry about rainy weather because it becomes rainproof in 30 minutes. Also, it offers visible results in 12 hours and is very simple to apply.

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9.4
Best Weed Killer for Large Gardens

If you need a weed preventer, check this option that kills weed seeds. This is a great choice for large gardens with various plants and decorative areas and is simple to apply.

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9.3
Best Fast-Acting Weed Killer

A great weed killer for flower beds that activates quickly and becomes rainproof very fast. You will get visible results in three hours, and you can find this product with different bottle sizes.

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9.2
Best Versatile Weed Killer

As a versatile product, we have this weed killer for flower beds. It is famous for its long-term effectiveness and works on a wide variety of weeds.

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9.0
Best Weed Killer with Feed

This 2-in-1 solution allows you to get rid of the pesky weeds while also acting as a versatile feeder for your plants. It is safe for your pets and is quite powerful.

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8.8
Best Concentrated Weed Killer

Another glyphosate-based concentrate that appears to be highly effective against weeds in the flower beds. It has good weather resistance, so you can rest assured that it works even after the heavy rain.

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8.7
Features
  • Active ingredients: Glyphosate – 41%
  • Perfect against: 175 types of weeds, roots
  • Consumption: 1 gallon per 25,500 sq. ft.
  • Net contents: 1 gallon
  • Shelf life: 5+ years

 More features: rainproof in 2 hours, visible results in 2 – 4 days, makes up to 85 gallons of ready-to-use spray

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If you’re looking for the best weed killer for flower beds while also looking for immense value for money, then this is going to be the perfect option. It ticks all the boxes on what makes a great weed killer with its 41% glyphosate solution.

You’re not going to have to wait long to see great results as the weeds should start dying off in 2-4 days. Once the weeds are gone, you’ll get long-term effective performance, and that is also helped by the fact the weed killer is quite waterproof.

For some people, it’s going to be a little too powerful. You need to be very careful with the application as otherwise, you can damage your plants. The positive side to that is that it’s going to be highly effective in killing a wide number of weeds. There is no doubt that the level of performance that you get here is high. With this concentrated solution, a gallon tub is going to last for a long time.

Pros
  • Works quickly
  • Lasts a long time
  • Reasonable price
  • Wide area of usage
Cons
  • Needs careful application
Features
  • Active ingredients: Glyphosate – 41%
  • Perfect against: weed and grass
  • Consumption: 3-5 tablespoons per gallon, 32 fl. oz. cover up to 6,400 sq. ft.
  • Net contents: 32 fl. oz.
  • Shelf life: 1+ year

 More features: double-surfactant formulation dries on plants fast, rainproof in 2 hours

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Another product that needs very careful application is this Fertilome Killzall Weed and Grass Killer, as it’s going to destroy any weeds or grass that it touches. It’s highly concentrated, which is a part of the reason why it’s such great value for money.

The powerful solution is going to be highly effective, and you should only need to use this one time for you to get the results. As well as flower beds, the weed killer is also going to be ideal for a wide range of different areas.

It becomes rainproof in around two hours, and, therefore, you can apply it without worrying about the weather ruining its effectiveness. It’s an aggressive solution but one that is going to work very well and give you the results that you need.

Pros
  • Works quickly
  • Highly concentrated
  • Great value for money
  • Can be used almost anywhere
Cons
  • Needs careful application
Features
  • Active ingredients: Diquat Dibromide – 2.30%, Fluazifop-p-butyl – 1.15%, Dicamba (dimethylamine salt) – 0.77%, Oxyfluorfen – 1.92%
  • Perfect against: all types of weeds and grasses, roots
  • Consumption: 7 fl. oz. per 1 gallon of water (1 gallon treats up to 300 sq. ft.)
  • Net contents: 40 fl. oz.
  • Shelf life: 2+ years

 More features: visible results in 3 hours, prevents weeds from coming back for up to 5 months, rainproof in 10 minutes

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If you want to have the quickest results possible, then you’re not going to get much better than this weed killer. You should start seeing results in around three hours as it will then work to eradicate them completely.

It is quite concentrated, but you may need quite a high volume to be able to get the results that you want. Due to that, a bottle won’t last for quite as long as other weed killers in this list. For fast results, however, this is going to be perfect.

As well as quick results, it also becomes rainproof extremely quickly in around 10-15 minutes. It’s ideal for any climate where the weather can change quite quickly. It will kill the weed right down to the root, which makes the reemergence of the weed quite unlikely.

Pros
  • Long-term effectiveness
  • Results take a few hours
  • Weather-resistant
  • Kills the root of weeds
Cons
  • Consumption rate is high
4.

Green Gobbler Vinegar Weed & Grass KillerBest Natural Weed Killer

Features
  • Active ingredients: acetic acid – 20%
  • Perfect against: weeds and grasses, including dandelions, clover, chickweed, dollarweed, thistle, general broadleaf
  • Consumption: 1 gallon per 1,200 sq. ft.
  • Net contents: 1 gallon
  • Shelf life: indefinitely with a sealed lid

 More features: certified for organic use, Glyphosate-free, 30-day money-back guarantee, full desiccation in less than 24 hours, comes with a sprayer

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If you are looking for a natural weed killer for flower beds, then your search can end here. This is a brilliant weed killer, which uses vinegar as its active ingredient. This vinegar is around 4x as concentrated as the one you may have in your home.

The vinegar weed killer for flower beds is non-selective, which does mean that it’s going to kill everything it touches. Due to this, you have to be quite careful about where you’re going to be using it.

It’s perfect for those looking for an organic solution to their weeding problem. It’s quite versatile and is going to be effective in a wide range of different areas. You’re going to see results in less than 24 hours, and you’ll be impressed with its performance.

Pros
  • Natural formula
  • Versatile performance
  • Quite strong solution
  • Results in less than 24 hours
Cons
  • Non-selective
Features
  • Active ingredients: Glyphosate (isopropylamine salt) – 18%, Diquat dibromide – 0.73%
  • Perfect against: weeds and grasses to the root
  • Consumption: 6 fl. oz. per one gallon of water
  • Net contents: 16 fl. oz.
  • Shelf life: 8+ years

 More features: rainproof in 30 minutes, visible results in 12 hours, for use in a tank sprayer

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Roundup has been a trusted name in the world of weed-killing for a long time now, and this is able to deliver on that reputation. What makes this one of the most popular products out there is that it’s a safe weed killer for flower beds.

If you want a product that won’t affect flowers, then this could well be your best option. It’s quite simple to apply, and you won’t have to worry about getting it in the wrong areas or spraying it where you shouldn’t.

One thing you should consider is that it’s not very pet-friendly, which is something to bear in mind. What is impressive about this weed filler is that it’s highly effective and also very resistant to poor weather, making it an impressive option for any gardener.

Pros
  • Highly effective
  • Resistant to poor weather
  • Safe for plants
  • Fairly simple to apply
Cons
  • Not pet-friendly
6.

Preen 2464083 Garden Weed PreventerBest Weed Killer for Large Gardens

Features
  • Active ingredients: cellulose – 40-45%, corn cobs – 50-55%, mineral seal oil – 1-2%, Trifluralin (Treflan) – 1.47%
  • Perfect against: broadleaf garden weeds such as chickweed, knotweed, purslane, and thistle, and grassy garden weeds like crabgrass, foxtail, and bluegrass
  • Consumption: 31.3 lbs. cover up to 5000 sq. ft.
  • Net contents: 31.3 lbs.
  • Shelf life: 2+ years

 More features: blocks weeds up to 3 months, can be applied any time in spring, summer or fall, safe for use on edibles

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If you want the best pre-emergent weed killer for flower beds, this would be the one for you. What does that mean? Well, this doesn’t kill existing weeds, but instead, it will simply prevent any new growth from occurring.

That makes it one of the best weed and grass killers for flower beds is that it can be used on edibles safely. You can apply it in three seasons, and this product will prevent new weeds from appearing for up to three months.

This granular weed killer for flower beds is very simple to use, and you’ll be able to spread it out in no time at all. It’s hard to judge the results of this as it’s designed so that nothing grows rather than destroying weeds, but it’s able to do that job very well.

Pros
  • Simple to apply
  • Great for decorative areas
  • Kills weed seeds
  • Don’t take long to use
Cons
  • Doesn’t kill existing weeds
7.

Spectracide Weed & Grass KillerBest Fast-Acting Weed Killer

Features
  • Active ingredients: Diquat dibromide – 2.30%, Fluazifop-p-butyl – 1.15%, Dicamba (dimethylamine salt) – 0.77%
  • Perfect against: weeds, grasses, roots
  • Consumption: 5-7 fl. oz. per 125 sq. ft. when mixed with 1 gallon of water
  • Net contents: 64 fl. oz.
  • Shelf life: not specified

 More features: rainproof in 15 minutes, visible results in 3 hours, kills the roots

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This product is definitely worth considering if you want your weed killer to have a wide range of use. You’ll enjoy this as it works great for flower beds and also everywhere else in a garden too.

What makes it one of the best weed and grass killer for flower beds is the rapid results that Spectracide is known for. The weeds will start dying off in a matter of hours, and the rain proofing on this solution is also impressive.

There is a range of great buying options that will allow you to get the exact amount that you need. Weeds can grow back over time, but with the repeated doses that this will be able to give you, they’ll be constantly suppressed. Many people admit that this product is highly effective if used properly.

Pros
  • Can use in many areas
  • Variety of bottle sizes
  • Rapid results
  • Impressive rain resistance
Cons
  • Might require several applications for better results
8.

Ortho GroundClear Vegetation Killer ConcentrateBest Versatile Weed Killer

Features
  • Active ingredients: Glyphosate (isopropylamine salt) – 2,97%, Imazapyr (isopropylamine salt) – 0.47%,
  • Perfect against: dandelion, crabgrass, Canada thistle, bur clover and more
  • Consumption: 2 gallons can cover up to 3200 sq. ft.
  • Net contents: 2 gallons
  • Shelf life: 1+ year

 More features: weeds and prevents new growth for up to 1 year, fast-acting, easy to apply with a sprinkling can or a tank sprayer

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Large gardens with many flower beds are probably going to need a lot of solution. With the 2-gallon tub, you’re going to be able to kill a huge amount of weeds with a coverage area of up to 3,200 square feet.

What the 2-gallon tub gives you is incredible value for money. It has a long shelf life, and, therefore, you won’t have to worry about needing to throw this out after a couple of uses. It’s not the most highly concentrated solution around, but it still goes a long way.

Growing vegetables and fruit while using this weed killer is going to be a good idea as it keeps everything safe while still being able to kill a wide variety of different weeds. You also get long-term effectiveness here as once you’ve applied the solution, it’ll be a very long time before they start to grow back.

Pros
  • Great value
  • Works on a wide variety of weeds
  • Suitable for vegetables and fruit
  • Long-term effectiveness
Cons
  • Not highly concentrated
9.

Scotts Turf Builder Weed and FeedBest Weed Killer with Feed

Features
  • Active ingredients: 2,4-D – 1.21%, Mecoprop-p – 0,61%
  • Perfect against: dandelion, clover and more
  • Consumption: 14.29 lbs. cover 5,000 sq. ft.
  • Net contents: 14.29 lbs.
  • Shelf life: 4-5 years.

 More features: WeedGrip technology, works as a fertilizer and weed killer, recommended to use in spring

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Do you want to weed and feed at the same time? If so, this weed killer is going to be perfect as it’s a 2-in-1 solution. It has a high level of effectiveness, and you’re going to enjoy watching your weeds die, but your plants thrive.

One important consideration with this weed killer is that you’ll need to wet the flower beds or grass before you start using it. It’s only a minor thing but an important distinction between this and the other weed killers that we’ve looked at.

It works as a great fertilizer, and one bag of this is going to cover up to 5,000 square feet of area. It’s very safe to use, and you won’t have to worry about it coming into contact with plants or pets. Although this weed killer is not that simple to apply, it’s very powerful.

Pros
  • Powerful performance
  • Safe for other plants and your pets
  • Versatile feeder
Cons
  • Application can be somewhat time-consuming
10.

Martin’s 82004318 Eraser Weed & Grass KillerBest Concentrated Weed Killer

Features
  • Active ingredients: Glyphosate (isopropylamine salt) – 41%
  • Perfect against: annual, perennial weeds, shrubs, vines and more
  • Consumption: 1-2 fl. oz. per gallon of water
  • Net contents: 1 quart
  • Shelf life: 1+ year

 More features: broad-spectrum post-emergence herbicide, rainproof in hours, low odor water-based formulation, kills unwanted vegetation easily

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Here, we see another weed killer that has 41% glyphosate as an active ingredient, which is going to give you excellent results. Martin’s have called this solution ‘Eraser’ as that’s exactly what it’s going to do to those horrible weeds in your flower beds.

While the results are going to be brilliant, it does require a little bit of patience as the results aren’t going to be instant, but they will come. Part of the reason for that is the good level of weather resistance, so you don’t have to worry about the rain washing it away.

The solution is densely concentrated, which means that one tub of the weed killer is going to last for a long time. With a shelf life of over year, it’s should easily last for a full season. It’s another great option and one that will get rid of perennial weeds, shrubs, and vines as well as many other types of weeds.

Pros
  • Good value
  • Highly effective
  • Densely concentrated
  • Good weather resistance
Cons
  • Requires a bit of patience to see results

Buying Guide

There are many different types of weed killers out there, and it can get a little frustrating trying to work out which one is going to be the best option. In this buying guide, we aim to remove that frustration and make your life as easy as possible. We’ll do that by looking at all the key features, why they are important, and how they relate to you. In the end, we’ll also go through the frequently asked questions that will put your mind at ease.

Pre-emergent vs. post-emergent weed killers

Do you already have a beautiful flower bed and want to keep it that way, or do you have a flower bed that is already full of weeds?

If you don’t have any weeds at the moment, then you’ll want to use a pre-emergent weed killer. These work by preventing the growth of weeds, and they will allow your flower beds to keep looking beautiful throughout the whole season.

Post-emergent weed killers, instead, remove anything that has emerged, and that is actively growing. This is the most common type of weed killer as it helps to find your enemy and get rid of it once and for all.

How to pick the best weed killer for flower beds

10 Best Weed Killers for Flower Beds - Make Your Garden Look Beautiful!

There is a lot to think about when it comes to choosing the best weed killer for flower beds as the right answer is going to be different for everyone. It’s important to know what type of weeds you have, space you need to treat, and if you need to protect the grass and other plants. Each weed killer is slightly different, and everyone’s needs are different. As we go through each section here, it’s a good idea to note how important each feature is to you. Once you do that, you’ll build up an idea of which weed killer is the best for you.

Brand

As with any type of product, there are some brands that are quite famous and others that are not as well known.

In this list, we have seen the likes of Scotts and Roundup that have long been big names in the garden industry. They are trusted brands, but that doesn’t mean that you should automatically opt for them.

Our top tick was Compare-N-Save as we though their weed killer offered fantastic value.

Whenever you’re looking for a weed killer, you want to ensure that it has good reviews. Getting a trusted brand can give you peace of mind, but you also want to get a weed killer that is highly rated.

Active ingredients

Each weed killer is going to have one or several active ingredients that are aimed at removing the weed. This term refers to any ingredient that is biologically active, meaning it has a positive or negative effect on living matter.

In the weed killer, that is seen as ‘negative’ as it destroys them. Glyphosate is a common active ingredient, such as seen in the Fertilome Killzall Weed and Grass Killer at 41%.

Different active ingredients are able to attack different things, and it’s always a good idea to see what weeds are targeted. If you want a natural active ingredient, then the Green Gobbler Vinegar Weed & Grass Killer is going to be the best option.

Types of weeds it can target

Do you always get a specific type of weed? If so, then some weed killers can be more effective against some weeds than others. The Green Gobbler Vinegar Weed & Grass Killer, for example, is highly effective against common weeds, such as dandelions and clovers.

If you want to kill grass as well as weeds, then the Spectracide Weed & Grass Killer is going to be your best friend.

Before deciding which weed killer to buy, it’s a good idea to have a quick check of what types of weeds you have and which weed killer is going to be the most effective against them.

Toxicity

As you know, a lot of these products use quite dangerous chemicals. Due to that, you need to give extra considerations if you have any pets or children. Therefore, you need to apply it well away from them and wait until it’s been absorbed.

There are other options such as the Green Gobbler Vinegar Weed & Grass Killer that are a lot less toxic, and you’ll be able to use them with more confidence. It’s worth noting that a few of these less dangerous weed killers aren’t as effective. Whenever they are not in use, you want to ensure that they are stored and locked away from anyone.

Consumption

Everyone will have a slightly different garden size, and each weed killer is going to cover a slightly different area. You don’t want to buy some weed killer only to find you’ve run out halfway through your treatment.

It’s good to get an idea of how much area you need to cover by estimating the consumption rate. It’s likely that any bottle or bag of weed killer is going to be more than enough for your flower beds, but if you want to cover other areas too, the demands may be higher.

Efficiency

You can face cheap weed killers that harm the leaves of the weed and make it look as though they are working, but the weed can quickly spring back into life. You need a product that can destroy the root of the weed to get rid of it permanently.

All the weed killers we looked at here have a great level of long-term efficiency, but some will work quicker than others. If you want lightning-fast results, then the Spectracide Weed & Grass Killer is going to be a great choice.

Package

All these weed killers come in different shapes and sizes. You have the likes of the Roundup Weed & Grass Killer Concentrate Plus, which comes in a smaller 16oz tub, but on the other end of the scale, the Ortho GroundClear Vegetation Killer Concentrate comes in a 2-gallon tub.

When looking at the price, you should also think about how much of the solution you get and the overall value it’s going to give you. A concentrated solution is a large tub that can last for a very long time as you’d mix it with water.

Shelf life

Bioactive ingredients can degrade over time, and, therefore, weed killers will have a limited shelf life. If you get a large tub of weed killer, but only have a small garden, then you may find yourself throwing it out before you have even gone halfway through it.

If you don’t have a large usage, then you can either get a granulated solution, such as the Scotts Turf Builder Weed and Feed, which has a very long shelf life of 4-5 years or perhaps get a smaller one, such as the Fertilome Killzall Weed and Grass Killer, which has a shelf life of around one year.

Prices

When comparing the price of weed killer, you also have to consider if it’s value for money by looking at its effectiveness, size, and shelf life.

Around $60, the Preen Garden Weed Preventer is the most expensive solution we’ve looked at here, but as it’s a huge granulated bag, it will last for a long time with its brilliant shelf life.

Just above $20, there a few great options, such as the Compare-N-Save Concentrate Grass and Weed Killer. This is a highly effective solution, which is going to be able to cover a wide area.

Just above $10, there are a few great options for those on a budget. The Fertilome Killzall Weed and Grass Killer & Roundup Weed & Grass Killer are both ideal for those who don’t need to cover a wide area. They come in smaller tubs but still have perfect effectiveness.

FAQ

You can apply your weed killer at any time if they are causing a problem, but it’s always the best idea to try and get on top of your weeds in spring. However, if you’re worried about your plants being affected, then it can be the best idea to wait until they are fully established.  You’re always going to get the best result of your weed killer on a warm and dry day. This is when the leaves are going to be more absorbent. Ideally, you also want the wind to be low as possible, as this can cause your plants to be contaminated with the weed killer.  As for the weed preventers, these can be applied before planting the flowers. Also, don’t forget to check the product description to get more information about it.

Each weed killer targets slightly different things and is the most effective against specific weeds. While some are less harmful to plants than others, a weed killer can be quite dangerous to many plants if it comes in direct contact with it. Not all of these products are made in a way that is going to cause minimal damage to your plants. Glyphosate is a common active ingredient in the weed killer. This is absorbed through the leaf and makes it down to the root. Once it has killed the weed, however, it quickly degrades in soil, making it safe for your plants.

Before you use any type of weed killer, it’s important that you read the instructions carefully. Each weed killer is slightly different, and they all may have different guidelines. In some cases, you’re going to be fine using a weed killer around edibles. The Preen Garden Weed Preventer is an example of a great weed killer that is going to be highly effective in killing weeds while protecting edibles. You always need to be careful when applying the weed killer, and this will be especially true about edibles.

Our Verdict

All the weed killers that we have looked at here are highly effective in their own way, but we found the Compare-N-Save Concentrate Grass and Weed Killer to be the best option out there. It works very well, and it will give you impressive results.

If you are searching for something less expensive, check the Fertilome Killzall Weed and Grass Killer. It becomes rainproof quite fast and is highly effective.

Lastly, the Spectracide Weed & Grass Killer With Extended Control Concentrate is our choice for its long-term performance. This is a great option for those who need more protection from pesky weeds.

We hope that this information helped you find the best weed killer for flower beds, and now, your garden looks beautiful and charming!

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