Weed B Gon vs Roundup (Which Weed Killer Best)

It’s a pretty common question among new lawn owners when they’re looking to pick herbicides for their lawns. They want to kill selective weeds that won’t interfere with the consistency of their beautiful lawn.

So, which is good for your lawn between weed b gon vs roundup?

Weed B Gon kills selective weeds while Roundup is effective in killing a wide range of weeds, grasses, and plants. This makes Weed B Gon ideal for clearing lawn weeds. On the other hand, Roundup is used to eradicate weeds from flower beds, vegetable beds, and other places where you don’t want any weeds to grow.

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Today, you’ll get to understand how the two weed killers differ from each other. You’ll learn about their target weeds, application, safe use, and more! 

Weed B Gon vs Roundup: Key Differences

Let’s start by comparing the two herbicides head-to-head to give you a better understanding of them. Here’s how it looks:

Feature Weed B Gon Roundup
Active ingredient 2,4-D, dicamba and mecoprop-p Isopropylamine salt of glyphosate and polyethoxylated tallow amine.
Type of Herbicide Selective Non-selective.
Target weeds Broadleaf weeds, Bermudagrass, Centipedegrass Grasses and broadleaf weeds.
Safety Relatively safe for humans and pets when used as directed More toxic to humans and pets than Weed B Gon.
Area of Application Lawns Lawns, driveways, flower beds, vegetable gardens.
Effectiveness Effective on most broadleaf weeds, but may not be as effective on tough weeds Effective on most grasses and broadleaf weeds, including tough weeds.
Cost More expensive than Roundup Less expensive than Weed B Gon.

You pretty much get the idea by now. But let’s go ahead and take a more comprehensive take on the two weed killers. 

While you’re at it, you can also check out similar herbicides like Pasture Pro and Grazon.

Ortho Weed B Gon vs Roundup For Lawns: Detailed Differences

We’re going to discuss the Active Ingredients, target weeds, application, safety, and cost of the two herbicides.

Feature 1: Active Ingredients

The active Weed B Gon ingredients are 2,4-D Acid, Mecoprop-p Acid, and Dicamba Acid. On the other hand, the active Roundup ingredients are Glyphosate and Isopropylamine salt.


Source: roundup.com

Feature 2: Target Weeds

According to Ortho Weed B Gon, their product kills over 250+ selective weeds. Some of those selective weeds include:

  • St. Augustinegrass
  • Bermudagrass
  • Centipedegrass
  • Buffalograss
  • Bahiagrass
  • Kentucky bluegrass
  • Ryegrass
  • Tall fescue
  • Fine fescue

This selective approach makes Weed B Gon safe to use for your lawn without any chance of harming your lawn grass. 

In contrast, Roundup is used to clear out pretty much every form of weeds, grass, and plants in a specific area. Roundup is not selective like Weed B Gon and clears up pretty much everything in its way.

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Due to being non-selective, Roundup can harm or kill most plants it comes into contact with, including both broadleaf plants and grasses.

So Roundup is clearly not lawn-friendly. 

Feature 3: Application

Weed B Gon is a herbicide made to use on lawns, where you want to kill selective weeds and keep your lawn grass intact. It’s not generally recommended for use in flower beds or vegetable gardens.

Weed B Gon

Source: growyouryard.com

You can use Roundups pretty much anywhere. 

Roundups are applicable in patios, walkways, driveways, gravel areas, around tree rings, mulched beds, vegetable gardens, lawn renovation, and garden prep.

Sounds like that pretty much covers everything!

Here’s a video you can check out which is using Roundup to remove crabgrass from the lawn:

Feature 4: Safety

Let’s talk about the safety of the two herbicides. 

As mentioned before, Glyphosate is an active ingredient in Roundup. And it’s toxic for humans and pets, leading to skin problems and irritation.

Exposure to glyphosate can occur through skin contact, inhalation, or ingestion.

The mix ratio of the herbicide also dictates the effects of it. 

The active ingredient in Weed-B-Gon, dimethylamine salt of 2,4-D acid, has lower acute and chronic toxicity to humans than many other herbicides and common household chemicals. 

If applied as directed, Weed B Gon should have little to no effect on human and pet health.

However, it is still important to follow the instructions on the label and avoid skin contact or inhalation of the product.

Feature 5: Cost

Of the two herbicides, Weed B Gon is more expensive than Roundup. 

In fact, you’ll have to spend around 3 times the amount of Roundup to get your hands on Weed B Gon. 

But then again, the Ortho Weed B Gon comes with a comfort wand that’ll help you spray the herbicide on your lawn.

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Weed B Gon vs Roundup: Which One to Pick?

By now, you must have a pretty good idea of what you need. But let’s go through them anyways. 

Want a lawn-friendly herbicide that won’t harm your lawn grass? You should definitely go for Weed B Gon. 

Need something more extreme that can kill pretty much every weed, grass, and plant? Then you need Roundup. However, you must avoid using Roundup on your lawns as it’ll destroy your lawn. 


What weed killer is stronger than Roundup?

Eraser 41% by Control Solutions Inc is a more effective weed control herbicide than Roundup. Another highly recommended weed control brand would be Glyphosate 4 Plus by Alligare. 

Is Roundup safe for pets?

No, Roundup is not safe for your pets. In fact, the glyphosate present in Roundup can be highly toxic for your dogs as they are more susceptible to the toxins present in it. Ingestion of Roundup or such residue can lead up to dangerous aftermath. 

Which weed killer works the fastest?

The Ortho GroundClear Weed & Grass Killer claims to eradicate grasses and weeds within 15 minutes of application. So it’s one of the fastest weed killers out there. 


That’s pretty much everything about Weed B Gon vs Roundup. Hope you found this guide helpful. If you have any further queries, feel free to let us know in the comments.

Have a great day!