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Can Bleach Kill Weeds – A Life-Changing Answer!

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Weeds can be detrimental to the overall health and appearance of your lawn.

One of the primary ways weeds can damage plants is by competing for nutrients and moisture in the soil, which can lead to stunted growth, malnutrition, or even the death of the desired plants.

Moreover, weeds ruin the aesthetics of a garden, making it look less appealing.

Many gardeners are interested in finding practical and cheap ways to eliminate weeds to counter this annoying and unwelcoming presence in any garden. As bleach is easily available in our homes, we are often interested in knowing if it can kill weeds.

Bleach is a powerful herbicide, but can it be effective against the stubborn growth of weeds?

While bleach is often praised for its versatility, it’s essential to consider the potential consequences of using it as a weed killer. In this article, we’ll see if bleach can kill weeds and explore the effects of bleach on weeds and the overall plant.

Let’s begin!

Can bleach kill weeds? A Spray Bottle Full Of Weed Killer Being Used To Eliminate A Dandelion Weed Growing In A Garden Courtyard.
Can bleach kill weeds? | Image via Shutterstock.

Can Bleach Kill Weeds?

Yes, bleach can kill weeds.

Bleach is a liquid chemical solution and is categorized as a non-selective herbicide that can help control weeds’ growth. It can work as a DIY herbicide, and an undiluted weed mixture can help kill the weeds permanently.

All you have to do is spray it and let it sit for three days.

Furthermore, it is essential to note that you can only kill weed with bleach in areas where you are not planning to replant anytime soon, like driveways, pathways, cracks, patios, and pavements. Also, bleach might not work on evasive weeds like knotweed, ivy, or brambles.

It would be best also to be careful while using it as it is a toxic chemical.

Therefore, bleach can kill weeds, but it should not be relied upon as the only method for controlling weed growth.

How Does Bleach Work on Weeds?

Bleach can be a tricky solution when it comes to weeds.

It is not often recommended since it can have some severe environmental impacts when misused.

In the right conditions and in small doses, bleaching can provide relief from unwanted weeds by changing the pH of the soil to highly acidic. This change in the pH makes the environment non-ideal for any kind of grass, weeds, or plants to grow or survive. These acidic conditions of the soil can stay for a long time, preventing the regrowth of unwanted and pesky plants most of the time.

This should only be done on a dry, hot day with no wind or rain forecasted within 24 hours of application. Coat the leaves and stems wholly and directly using a concentrated mixture of water and bleach.

After sitting for an hour or two, you will see the affected foliage wilt before eventually dying off in about three days.

Related article: Does Diesel Kill Weeds? | All You Need to Know! (

Should You Use Bleach to Kill Weed?

Using bleach to kill weeds can adversely affect your garden and yard because it is not made for weed-killing purposes.

While it may be tempting to reach for the bleach bottle when battling weeds, remember that because bleach is such a harsh chemical, it will kill not only the weeds but many other types of vegetation.

Furthermore, soil can be damaged and compromised by bleach use which could damage future crops you intend to grow.

If you do choose to use bleach as a weed killer, consider diluting it and limiting its use only to very specific areas. Dilution also adds another layer of safety against killing everything else in its vicinity; however, the spray should still be used with caution due to its high lye concentration.

Remember that other options are available to help combat weed growth around your home or garden that don’t involve hazardous chemicals like bleach.

How to Use Bleach to Kill Weeds Safely and Permanently?

Following are some tips and instructions on how to use bleach to kill weeds:

  • Take a spray bottle and pour in some undiluted bleach.
  • Spray this chemical solution onto the weeds directly.
  • Make sure you spray strictly on a designated area.
  • Repeat this procedure after two to three days on the leftover grass and weeds that are not dead.
  • After all the weeds are dead, you can either pull them out or let them decay.

If you use diluted bleach, you might have to apply the chemical more than 2–3 times to get rid of stubborn weeds and grasses.

Bleach & Detergent as a Weed Killer | How Effective for How Long? – YouTube

Safe Alternatives to Bleach for Killing Weeds!

Here are some safer alternatives to killing weeds without having to use bleach.


Vinegar is quickly becoming the preferred herbicidal option for many gardeners due to its natural, non-toxic qualities and versatility. Unlike bleach, vinegar kills weeds without releasing chemicals into the environment. In addition, it is a safe and effective alternative to synthetic materials that can be hazardous.

To eliminate weeds using vinegar, all that is required is a spray bottle filled with white vinegar, apple cider vinegar, or vinegar and salt solution, and apply it to any unwanted vegetation.

Boiling Water

Just pour boiling water from the kettle onto the weeds. This is effective for weeds growing on driveways.


You can prevent the growth of weeds from the desired area with the help of salt, but the problem arises that salt can prevent the growth of all the plants growing there.

So, it will work best for brick walkways or concrete sidewalks.

That’s all for today!


To conclude the article, I must say that while bleach can be a potent herbicide, it is not the best choice for weed control. It may seem like bleach would be an effective weed killer, but it can lead to damage or even death of desired plants if not used properly.

Furthermore, it may only be effective at killing the parts of the weed above ground while the roots may continue to grow.

Instead, it is recommended to use an herbicide specifically formulated for weed control or natural remedies like vinegar, salt, or boiling water. By using these methods, gardeners can safely and effectively eliminate weeds without putting their desired plants at risk of damage.

I hope this helps!