Top 4 Best Weed Killers for Flower Beds (**2018 Review**)

Looking for the best way to eliminate weeds in your flower bed in 2018? Then you're in the right place!

In this Pest Strategies product review you can expect to learn:

  • The weed killers we chose to beautiful your flowers beds (plus: our overall top pick)
  • The most common weeds you'll encounter
  • Pre-emergent vs. post-emergent weed killers
  • Extra accessories you may consider purchasing to maximize success
best weed killers for flower bed

Our Overall #1 Rated Pick

(updated as of 6/8/2018)

  • Kills over 200 types of weeds 
  • Attacks the root for easy removal
  • Comes ready to use with a convenient spray wand

Ortho offers a variety of pest control sprays, and they've expanded their reach by offering lawn control products as well. They've topped our list for the best weed killer for flower beds simply because their Weed B Gone MAX Plus spray is a blend of convenience and effectiveness in one affordable package.

The spray is ready to use upon arrival; simply extend the attached wand and begin spraying! There's no mixing required, so there's no room for miscalculation. In addition, you don't have to purchase an additional spray apparatus in order to get the job done.

The spray becomes rainproof within 1 hour after application, and results are obvious after just one spray. This weed killer won't damage desired plants in your garden and won't hurt your flower bed, but targets over 200 types of pesky weeds.

Check out our full guide below to see all the options we reviewed, as well as learn more about what role weeds can play in your garden!

Want to skip all this research and just hire a decent exterminator for your pest problem?

Click here to check out our exterminator search tool where we instantly send you free quotes from trusted (and thoroughly vetted) exterminators in your local area. 

(Process takes about 30 seconds)

Weed Killers for Flower Beds We Reviewed

Short on time?  Take a look below for the top 5 in our list. Otherwise, check out our buying guide.

Which Weeds Are Most Common Around Flowers?

So, which type of pesky weed will you most likely find snaking around your lovely flower beds?

Keep reading to get the scoop on a few of the most common types of nuisance weeds that infest desirable plant areas.

Bermudagrass

Commonly referred to as an "aggressive turf," bermudagrass is a tough type of grass which grows in thick tufts and can withstand heavy dry spells and long periods of heat without dying.

In addition, bermudagrass requires little maintenance or upkeep, and commonly bumps out other species of grass in an area, asserting a sort of evolutionary dominance. It's considered so aggressive that the state of Utah actually lists it as part of its Noxious Weed Act as a turf to be controlled and managed.

Spurge

These weeds look almost like horizontal vines, stretching out to form a floor of green across the ground. They have thick, brown stalks with green leaves branching out from the middle, and often coat an entire area within a short amount of time.

When the brown stalk in broken, it emits a sticky milk that can help identify the weed as a spurge. 

Here's a quick video rundown on spotted spurge, along with photos to help you identify this common type of weed. 

Sedge

These are sometimes prickly-looking, yellow systems which look more like dozens of small toothpicks than weeds. They prefer moist and wet soils, and can even sit dormant underground as seedlings for up to 10 years while waiting for favorable conditions to sprout!

These particular weeds are a snap to spot, because the yellow spikes obviously jut out of green grass. 

Yellow nutsedge, however, looks a bit different from its spiny cousins. Check out what Lowell Sandell from the University of Nebraska Lincoln Extension has to say about this common type of weed. 


Pre-Emerging vs. Post-Emerging Weed Killer

When you're shopping around for weed killers, there's a lot of talk about pre- versus post-emerging herbicides.

What does that mean, and what's the better buy?

Pre-Emerging

This means that the weed killer targets a certain plant before it sprouts. 

Essentially, this substance goes into your soil and prevents the weed or plant from growing at all. This doesn't always work—in fact, for anything other than annual weeds, pre-emergent control methods have been shown to be ineffective.

However, for most types of winter and summer weeds, you can expect to see results when using a pre-emergent herbicide.

Post-Emergent

This is a product which targets weeds that have already sprouted

Normally, a post-emergent herbicide takes the form of a spray or—in some cases—granules. The weeds are targeted by the herbicide and then die quickly, within a matter of a few days or weeks.

Post-emergent weed killers are split into two categories: selective and non-selective herbicides. 

  • selective herbicides target and kill only weeds
  • non-selective herbicides will kill any plant life they encounter

For this reason, it's essential that you read the labels of weed killers carefully and protect your flower beds!

The last thing you want is to accidentally douse your favorite blooms with an herbicide that ends up killing them. 

best weed killer for flower beds facts

Are Other Accessories Required?

A few of the options in our list below require the use of a spraying device to administer the solution, which you'd have to purchase as a separate transaction.

We recommend something like this: Chapin's 2-gallon backpack-style sprayer which can be used time and time again for anything from insect repellant to treating your home for termites.

Want to skip all this research and just hire a decent exterminator for your pest problem?

Click here to check out our exterminator search tool where we instantly send you free quotes from trusted (and thoroughly vetted) exterminators in your local area. 

(Process takes about 30 seconds)

Weed Killers for Flower Beds We Reviewed

In the below section we break down each of our product recommendations in a little more detail.​

  • Rainproof protection after one hour
  • Results after just one application
  • Kills over 200 types of weeds

Ortho hit a home run with their Weed B Gone MAX Plus Spray: it's ready-to-use, it's hassle-free, it's affordable, and it's effective.


What more could you ask for?


This is why we rated it as our top pick. The 1.1 gallon container ships to customers pre-mixed with an applicator wand, which eliminates the need for at-home mixing (and possible miscalculation).


Weed B Gone MAX Targets the unsightly weeds and leaves your desired plants alone, which means that it's an ideal way to take the pesky plants out of your flower garden.


We recommend this weed killer to those who want an all-around effective way to eliminate several different types of weeds from their flower bed without killing their flowers.


Pros

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    Targets over 200 types of weeds
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    Leaves desired plants and flowers alone
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    Ready to use with its own spray wand
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    Rainproof in 1 hour

Cons

  • Some customers reported that it turned weeds brown without killing them
  • Isn't always effective on bermudagrass
  • Pre-and post-emergent herbicide
  • Offers up to four months of protection against new weeds
  • Rainproof in 10 minutes
  • Consumer guarantee offered by manufacturer

Roundup offers the total package in their Extended Control Weed and Grass Killer: a weed killer that kills existing weeds and prevents new ones for up to four months, a satisfaction guarantee, and a rainproof solution in just ten minutes.


So why is this product our runner-up?


These are certainly convenient aspects of using this particular product, but convenience often comes at a price. In this case, the cost of Roundup is much higher per volume than using Ortho, which is why we ranked Ortho in our number one spot and Roundup as number two. 


We recommend this product to those who want a fantastic way to kill the weeds around their flower beds, but don't mind paying a little extra for a few modern conveniences.


Pros

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    Rainproof protection in 10 minutes
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    Kills weeds and stops new weeds from growing
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    Offers up to 4 months of protection against new weeds
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    Satisfaction guarantee with proof of purchase

Cons

  • Customers must use a high concentration
  • Some customers had to reapply in heavy rainfall
  • Begins working immediately
  • Customers can expect to see results in as little as 2 days
  • Post-emergent herbicide attacks weeds at the root system

Compare-N-Save Concentrated Grass and Weed Killer made our list because of its simplicity and effectiveness—basically, it just works.


After the first spray, the solution coats your yard and gets to work. The weed killer begins to work on contact, and becomes resistant to rainfall within a matter of hours. Customers report being able to see results within 2 and 4 days!


An external sprayer is required to be able to spray this solution across the yard, and this is sold separately. The good news is that this spray nozzle can be reused for many different endeavors, so it's a wonderful investment for your garden.


We recommend this weed killer to those who want a seamless way to manage the weeds creeping into their flowerbeds without damaging their precious bulbs.


Pros

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    Comes in many different size options
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    Results occur within days
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    Post-emergent herbicide kills weeds at the root system
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    Product becomes rain-proof hours after application

Cons

  • Requires external spray nozzle for application
  • Must be reapplied when new weeds form
  • Some customers need to mix the solution higher than normal
  • Blocks weeds from growing
  • Can be used around protected plants
  • Small granules can be scattered and absorbed into the soil

Preen Extended Control Weed Preventer is unlike any of the other options we've placed on the list—instead of working to kill weeds that have already sprouted, this substance works to prevent them from growing in the first place.

Another stark difference is that this product isn't a spray or a concentrated solution. Preen uses a package of small, sand-like granules that are to be shaken across the garden soil then absorbed for efficacy. 

The granules are not selective, which means they will kill every plant they touch. However, you can protect your flower beds by covering your desirable plants with plastic or cardboard. This way, only the weed-growth areas are exposed to the weed-prevention granules. 

If you do happen to get some of the granules on your desirable plants, you can simply wash them with water immediately. Flowers can be re-planted into affected soil within days, so you don't have to let the presence of the weed prevention granules hinder you at all if you have a gardening weekend coming up!

Pros

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    Stops weeds before they grow
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    Ready-to-spread granules require no mixing
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    Offers up to six months of protection
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    Can be used around all pre-protected desirable plants

Cons

  • Product will kill all plants it touches
  • Customers must manually wrap and protect the flowers they want to protect

Our Top Pick: Ortho Weed B Gone MAX Plus

Here's the bottom line: nobody like weeds, especially when they invade our prized flower beds.

While all of the products in our list work, our personal favorite is the Ortho Weed B Gone MAX Plus because:

  • It arrives fully ready to use with a spray wand and no mixing required
  • The product won't cost you an arm and a leg
  • You'll get rainproof protection within an hour of spraying
  • After just one application, results are visible in your flower bed
  • This product targets over 200 types of nuisance weeds!

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