As a gardener, you’ve probably come across many DIY weed killers that are touted as economical and more natural than chemical herbicides.
One popular suggestion is bleach. Avid DIYers will recommend mixing with water, spraying on the undesirables, and waiting for impressive results.
It’s true. Bleach kills weeds. But is it good in the long run for your soil? Experts believe it’s not and for a good reason.
Let’s learn more.
How Does Bleach Kill Weeds?
Bleach is a strong chemical and its potent active ingredient, sodium hypochlorite, is formulated to kill bacteria, germs, and viruses. As such, it can kill any living thing it comes into contact with, including plants.
Whether concentrated or diluted, once sprayed on the foliage, the acid will kill the weeds down to the roots. Since it leaches into the soil, you don’t have to worry about weed regrowth.
Undesirable Effects on Soil

Bleach is known to have a significant impact on the environment. So, what effects does bleach have on the soil when it’s used as a weed killer?
Even in small quantities, bleach will contaminate the soil, affecting plant growth and other processes like nutrient cycling that are vital for optimum ecosystem functions.
It breaks down organic matter and creates a nutrient imbalance, making the areas inhospitable for vegetation growth.
Bottomline, bleach will help you kill the weeds but may irreversibly damage the soil as well.
Better Ways to Control Weeds
Bleach may provide effective weed control but with negative long-term ramifications to soil health and the environment at large.
So, what other effective weed control methods can you use?
Here are our top recommendations:
- Hand-pulling or digging where plants have simple root systems.
- Natural herbicide options like boiling water, salt, and vinegar for young weeds.
- Mulching to prevent weed germination.
- Apply chemical herbicides for actively growing or established weeds.

Lead Editor for Insight Weeds.