Weedol Test Results + Before & After Photos

Tested by Daniel Woodley. Fact Checked by Elizabeth Smith. Published to Products on the 28th June 2022. Updated: 27th February 2023.

At DIY Gardening, we independently research, test, review and recommend garden products and plants. If you buy something via links, we may earn a commission. Learn about our testing process here.

Daniel Woodley

Daniel: Owner and product tester at DIY Gardening

Hello,

Are you thinking of using Weedol on your lawn to get rid of weeds?

Before you buy this weedkiller, please read my honest review and test results.

On this page, you’ll find:

  • A comparison between the concentrated versions of Weedol and their “ready to use” products.
  • Test results and before-and-after photos.
  • What others are saying; a short and to-the-point analysis of over 2000 online ratings and reviews.
  • Frequently asked questions answered.
  • Alternative weedkillers.

Weedol Comparison

Did you know that there are two versions of Weedol Lawn Weedkiller?

One is a “ready to use” product and the other is a concentrated version that the professionals use.

Both are currently on sale on Amazon:

Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol Lawn Weedkiller Gun 800ml 25% Free

Weedol Lawn Weedkiller Ready-to-Use

Weedol’s most popular “ready to use” product contains 800ml of diluted product that you spray directly onto the lawn via the built-in trigger and sprayer. It’s a spot treatment product and shouldn’t be used to treat an entire lawn, even a small one.

At around £9 per bottle, this product will cost you £11 per litre of usable product.

That sounds darn expensive to me!

Let’s compare that to the concentrated product:

The Concentrated Version

The concentrated version of Weedol Lawn Weedkiller costs about £15, but some retailers are selling it for slightly less.

You get 250ml of super contracted chemical.

Once diluted with water at the recommended rate, you get 85 litres of product.

At £15 per bottle, that works out at about 18p per litre.

Wow What a Difference!

£11 per litre versus 18p per litre, that’s a huge difference!

I know that ready-to-use products are great for spot treatments and tiny gardens but given the long shelf life of these chemicals, I think you’re better off buying the concentrated version. Of course, you will need a dedicated garden sprayer or watering can, but both are cheap and last for years.

Test Results: Does Weedol Lawn Weedkiller Work?

My experience with Weedol Lawn Weedkiller has been outstanding; it killed all the weeds on my lawn and didn’t damage any of the grass.

I did a test recently just for this review, here are the results on three different weeds.

(Please ignore the scorched grass, this was due to a recent heatwave that affected the entire lawn, including areas not treated with Weedol)

Weedol test results (1)
Weedol test results (2)
Weedol test results (3)
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol Lawn Weedkiller Gun 800ml 25% Free

As you can see from these images, it works and was effective on the weeds I used it on in my test.

Even though the weeds were still visible, they were crispy and showing no signs of life with no new offshoots etc.

This type of weedkiller stimulates the hormones in the weeds, causing the cells to grow fast. At first, it appeared that the weeds are getting bigger and taller, but after a few days of this accelerated growth, the cells could no longer sustain themselves, the cell walls then started to collapse, and the weeds started to wilt and die off.

I’ve used this weed killer may times and I know from experience that it can take up to 14 days before you see any significant results. Weedol is not a strong acid, it’s not designed to scorch or burn the weeds into oblivion.

Weedol is a selective weedkiller, meaning that it targets a specific set of weeds and won’t kill grass and nearby plants will be safe provided the instructions are followed.

I looked at the chemicals in Weedol and from my research, I believe it will be effective against 99% of the weeds most commonly found in UK lawns but I know from my past use that there are a few species of weeds that won’t respond to it (mostly non-broad-leaved weeds).

I’ve also used Weedol on a new lawn that was only 3 months old, and it didn’t damage the grass; the manufacturer’s website even states that it can be used on lawns older than 2 months which is great.

Does Weedol Kill The Roots?

Weedol does indeed kill the roots; I know this because I used it on another lawn a few years ago, and none of the weeds came back.

It’s worth noting that Weedol won’t kill the seeds from any weeds, so once they have set, they may still germinate, hence why I recommend a second Weedol treatment a few months after the first.

I Analysed Over 2000 Online Reviews: This is What Others Are Saying About Weedol

As part of my research into Weedol Lawn Weedkiller, I analysed over 2200 online reviews in 2022. I looked at what consumers liked and disliked about this product.

Here’s what I found:

  • 89% of reviewers rated the product 4 or 5 stars out of 5, which indicates that this product met expectations.
  • Only 4% rated Weedol 1 or 2 stars out of 5.
  • A considerable number of reviewers who left a 3-star rating liked the product but had issues with damaged or leaky bottles (mostly the ready-to-use variant).
  • Some of the 3 star reviewers stated that the product killed most but not all of the weeds. This highlights the fact that Weedol kills over 99% of weeds but not 100%, there are a few species that won’t respond to the product and may need to be manually pulled out or treated with different chemicals.

I looked in-depth at the negative reviews and discovered that:

There were more complaints about the “ready to use” version, and many were about damage caused in the post. Some stated that the quantity wasn’t enough to treat even a small lawn and a very small number said that it didn’t kill the weeds at all.

Complaints about the concentrated version were few and far between, but most seemed related to issues with diluting the product correctly. For example, one lady diluted 150ml into water instead of 15ml, which caused scorching to the grass.

Some of the negative reviews were also posted only a few days after using the product. As I previously stated and proven in the test results, Weedol caused the weed’s cells to grow at an accelerated rate for a few days until the weed could no longer sustain this growth, the cells then started to collapse, and the weeds began to fade – I found that it can take up to 14 days before you see visible results. Weedol doesn’t kill the weeds by scorching or burning them, and it takes time to work, something that several reviewers were not aware of.

Weedol produces several weedkiller products, some are for lawns while others are for flowerbeds and some are for hard surfaces. Several consumers used the hard surface weedkiller on their lawns and killed the grass, so you may want to check you have the correct version.

FAQs

Below I’ll answer the most common questions about Weedol Lawn Weedkiller:

Why Should I Trust Your Advice?

I’ve used Weedol Lawn Weedkiller successfully dozens of times but don’t take my word for it, check out the before and after photos I’ve published on this page.

Also, there are thousands of reviews on Amazon you can explore.

Will Weedol Scorch The Grass?

If applied correctly and according to the instructions, Weedol won’t scorch the grass but the chemicals may react with residue from other chemicals in sprayers or watering cans with unpredictable results, so always use a clean can/sprayer.

Also, the concentrated version should be thoroughly mixed with the water as it’s very strong.

I’ve never experienced scoring of the grass although once the weeds die off, bare patches of soil may be left which will need to be patched up with grass seed.

Can Weedol Be Used on Weeds Growing on Hard Surfaces?

Weedol for lawns will kill weeds growing on hard surfaces, but there are more effective products which we’ve listed in our guide to the strongest weeds killers you can buy.

Is Weedol Safe to Use in Gardens That Pets and Children Use?

Children and pets should be kept off the grass until the product has dried or 24 hours have passed.

Does Weedol Kill the Roots?

Weedol is absorbed by the weeds and kills both the top growth and the roots.

I’ve found it to be very effective at killing the weeds and stopping them from coming back.

What Chemicals are in Weedol?

The concentrated version of Weedol Lawn Weedkiller contains:

Fluroxypyr 10.7g/L

Clopyralid 5.4g/L

MCPA 53.8g/L

The ready-to-use version contains the same chemicals at lower concentrations:

Fluroxypyr 0.32g/L

Clopyralid 0.16g/L

MCPA 1.6g/L

What's Weedol's Coverage Rate?

15ml of Weedol will cover 10 sq metres of lawn (250ml will cover 170 sq mtrs). This assumes application via a garden knapsack sprayer, or similar.

The diluted “ready to use” version is for spot treatments only and an 800ml bottle will cover around 16 sq mtrs.

What Should I Do If Weedol Doesn't Kill All The Lawn Weeds?

Weedol will kill broad-leaved weeds commonly found in lawns, but it won’t kill every weed.

If Weedol doesn’t work, try Resolva, which contains a different group of chemicals that treat a slightly different set of weeds:

Mecoprop-P

Dicamba

Alternatively, if only a few weeds remain, just pull them out manually or use a weed puller.

Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol 1 litre Lawn Weed Killer Concentrate Liquid
Weedol Lawn Weedkiller Gun 800ml 25% Free
Weedol Lawn Weedkiller Gun 800ml 25% Free

Alternatives

There are two alternative products that I have experience with:

Both contain different chemicals that treat broad-leaved weeds, so if you find that Weedol failed to work on a specific weed species, there’s a good chance that Resolva or Greenforce will do the job.

Both of these weedkillers contain Mecoprop-P and Dicamba.

Resolva and Greenforce (concentrated versions) both contain:

Mecoprop-P 37.5 g/l

Dicamba 4.675 g/l

Greenforce is sold in 1-litre bottles and Resolve in 500ml bottles.

At the time of publishing, Greenforce works out slightly cheaper, and the bottleneck has a built-in measuring cap for accurate mixing.

I recommend trying Weedol first as it has better reviews and I believe is more gentle on the grass. Resolva or Greenforce can also be used to spot treat weeds that didn’t respond.

Weed Removal Tools

Looking beyond chemicals, there are a couple of weed removal tools that I own and recommend.

Discover the best manual and upright weed pullers and removal tools here.

Weedol concentrate bottle

Why Trust Us? Our Experience & Testing Methodology

Daniel has previous experience with Weedol and products with similar chemicals in them.

As Weedol is the most popular lawn weedkiller in the UK, he tested this product in June 2022 on 3 different weeds and took before, during and after photos as evidence.

While the initial testing period was 14 days, as of the 23rd of August 2022, none of the weeds has grown back.

The alternative products were suggested based on past use and their chemical composition.

This review was published by Daniel Woodley. Claims and important statements were fact-checked by horticulturist Elizabeth Smith prior to publication.

Learn more about DIY Gardening’s review and testing process here.

Author: Daniel Woodley

Daniel has over 18 years of experience in the construction, home improvement, and landscape garden industries.

He previously worked as a project manager and has experience in managing teams of tradespeople and landscape gardeners on both small and medium sized projects.

Daniel is also a keen gardener and enjoys growing unusual plants and tending to his lawn.

More About Daniel Woodley.

Daniel Woodley

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