Is Bleach a Weed Killer? Kill Weeds with Bleach.

Does Bleach Kill Weeds?

How to kill weeds with bleach.

Does bleach really kill weeds?

Short answer..... YES, it will kill weeds.

Before you go all gung ho and start spraying those pesky weeds with bleach please read the rest of this article.

In addition to being an excellent spot cleaner. Bleach is also a useful and deadly weed killer.

Be warned, it was not designed to be used as a herbicide.

Ditch the bleach, get an effective weed killer


It's stronger

Bleach wasn't designed to kill weeds, it simply burns away the visible part leaving the roots intact, your weeds will just regrow.


It's safer

Bleach is toxic to the environment, it will also stain concrete and other hard surfaces, use a real weed killer designed for purpose.


It's more effective.

You can't kill deep rooted weeds like Ivy, Brambles or Nettles with bleach, they may wilt, they may die back buy they will come back.


It saves time & effort

If you are set on using bleach be prepared to apply it again and again...Plus a few more times, save time & get the real deal.

Don't just take our word for it...

Honor Collings

Does exactly what it says

What did you use it for?

General weeds brambles bind weed.

Was it successful?

Yes very.

Tricia Gordon

Great product

What did you use it for?

To kill all of the weeds on the chuckies, paving and the roadside verge.

Was it successful?

Yes This is the only product that kills the weeds that come off of the farmers fields. It takes a few days to work. But it’s brilliant.

David Thompson

Stunningly successful - weeds brambles etc go never to return

What did you use it for?

Paths ,-Patio, drive (shingle)

Was it successful?


Eileen Murphy

Best weed killer I have ever used

What did you use it for?

We used this on our blocked drive and to kill the ivy which we had tried numerous other weed killers This was very successful we now have a weed free drive . No more ivy so very happy people would highly recommend good grow .

Was it successful?

I introduced my sister and daughter to this product how both now use it and are happy with the results

Maddy Wildblood

What did you use it for?

Originally to clear an area overgrown with ivy, brambles and nettles. Now it’s used to keep the paths and drive clear and sorting out any other weeds.

Was it successful?

Very successful. Ione application killed most of the ivy, nettles and brambles. A second dose dealt with any that remained. Excellent product and service.



What did you use it for?


Was it successful?


Ditch the bleach!

Get 20% off the #1 weed killer that kills everything

Is it safe to use bleach as a weed killer?

Short answer.... NO.

There are much better and safer alternatives.

Bleach is a hazardous chemical, it will affect your soil health and leave harmful residues wherever it is sprayed.

It may also seep into ground water, try vinegar instead.

It can also be harmful to those critters living in your soil in addition to your local wildlife and of course your pets.

Please note, the use of bleach as a herbicide may be illegal where you live. Please check with your local authority.

How does it work?

The same things that make bleach a terrific spot cleaner and disinfectant also enable it to be an efficient herbicide.

Bleach is poisonous to humans, the same applies to plants and other animals. It soaks into the roots of the plant destroying them as it would any other living organism.

After bleach has been poured on an area, the soil pH becomes very high, and nothing will grow there for quite some time (often several months).

How to use bleach as a herbicide:

If you really must use bleach as a weed killer then please follow the instructions below:


  • Wear safety gloves & eye protection at all times.
  • Use on a calm day to prevent accidental spraying.
  • Wait a few days before pulling out the dead weeds.
  • Try a little to test the effectiveness.
  • Exclude children and pets from the area.


  • Use too much.
  • Allow kids or pets near till it's dry.
  • Spray near plants you wish to keep.
  • Use on/near lawns or edibles crops.
  • Use near sources of water.
  • Use in aquatic environments.
  • Use on a day forecast for rain.
  • Mix with other chemicals

Bleach can either be diluted and used in a spray bottle or used undiluted and smothered in between the cracks of paving, slabs or other hard surfaces.

Apply on a warm, calm day with no forecast for rain.

If it rains the bleach may seep into other plants or areas of your garden killing everything.

Wind may blow the bleach onto other plants or persons when spraying.

How effective is it?

Bleach is an effective herbicide. It will kill weeds.

Bleach will kill most small weeds. It won't work against larger or invasive weeds like Ivy, Brambles or Knotweed. 

If you use it on soiled areas you will no longer be able to use that space for growing, it can take several months before your soil is suitable for planting.

Do you recommend it's use?

Most, including us recommend against it's use.

Over using bleach can kill grass, moss, plants, trees and harm insects and animal life. It can also seep in to the ground water and have other serious environmental effects. 

It may also be illegal where you live.

If you really must use it restrict usage to the cracks in your paving and use sparingly.

It would be a smarter, safer & more effective choice to use one of the alternatives listed below.

What are the alternatives?

Bleach is a harmful chemical.

Used sparingly it is an effective weed killer but there are many safer and more effective choices:

If you don't mind using chemicals to kill weeds then your best choice is probably a commercial weed killer.

They are designed to be used as herbicides and as long as you read the label and follow the instructions they are a more effective and safer choice.

Ditch the bleach!

Get 20% off the #1 weed killer that kills everything


About the Author

Hey there, I am founder and editor in chief here at Good Grow. I guess I've always known I was going to be a gardener. I'm on a mission to share my UK based weed control & lawn care tips with you all. If you have any queries please post in the comments below.

  • Vincente Tabita says:

    I have a bad problem with weeds coming through the cracks of my travertine pavers. If i use a weed whacker to cut the weeds flush to the paver and then spray bleach will that work and keep the weeds down a while for at least 2months due to the fact I am not always at my Florida home I go back and forth about every 6 to 7 weeks.

  • James Greenbaum says:

    I used concentrated bleach, that is, the one which is used for disinfecting swimming pools („liquid chlorine“, which in fact is sidupium hypochlorite solution) to clean off the black algae and moss from my roof tiles, and it worked amazingly well. That is what professional cleaning services use for that purpose as well. Some of the bleach got onto a small section of my grass, which was full of weeds anyway. Of course it killed off both the grass and the weeds that it came into contact with, but my wife then put fresh grass seed onto that area, and it grew immediately, and is now the part of my lawn with the most grass, and the least amount of weeds..

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