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Hydrogen Peroxide for Plants

Zach has been an online writer for over seven years. His writing focuses on gardening, cooking, and aquariums.

Hydrogen peroxide for plants sounds like pure madness, right? After all, why would you want to feed your garden vegetables with a solution that’s most famous for disinfecting wounds? Well, to much surprise, this compound is actually the garden’s best mate. That’s right, your garden can greatly benefit from hydrogen peroxide treatments!

It might come as even more of a surprise to hear that it is completely compatible with organic gardens! So why is it so great? Well, you’ll just have to keep reading to find out, but how does natural pesticide, soil aerator and water cleanser sound for a preview?

The Benefits of Hydrogen Peroxide in the Garden

Recognized by the United States EPA as an organic treatment for agricultural crops, hydrogen peroxide offers many benefits to gardeners.

Pesticide and Fungicide

When it comes to the cultivation of organic food crops, root worms and other soil pests are difficult to spot and even more difficult to treat for. Fortunately, feeding a diluted hydrogen peroxide solution to the infected plants will rid them of these soil-dwelling pests.

Even a small amount will rapidly degrade external tissues and kill fungus, gnat larvae, cutworms, and parasitic nematodes upon contact. A diluted solution can also be applied as a foliage spray to control the populations of soft-bodied pests, such as aphids and spider mites.

Soil Aeration and Root-Rot Treatment

An over-watered garden can easily fall victim to root rot. This rapid deterioration of plant roots can establish itself after just 24 hours of moist, oxygen-deprived soil conditions.

Again, hydrogen peroxide comes to the rescue! Watering thoroughly with a diluted solution, it will break down rapidly in the soil, boosting oxygen levels and expelling any anaerobic conditions.

Water Treatment

Many gardeners in urban areas with chemically treated municipal tap water choose to treat their water with hydrogen peroxide.

Due to its strong oxidation properties, it will remove chlorine, chemical pesticides and any organics that may be present.

Why Hydrogen Peroxide Works

The cleansing, insecticidal and aeration properties of hydrogen peroxide are all made possible by the chemical reaction that takes place when it breaks down.

Without going deep into chemistry, it should at least be known that under normal conditions, it will decompose to form water and oxygen. The formula can be observed as such: 2H2O2 becomes 2H2O + O2.

In the initial part of the reaction, a single oxygen atom is formed. Since it is unstable, this oxygen molecule will bind quickly.

The majority of the time, the oxygen will bind with another oxygen to form a stable O2 molecule (aeration property), but some of the time, it will react with organic tissue of pests, thus acting as an oxidizer that destroys tissue (pesticide property).


Soil Pest and Root Rot Treatment

  • Mix one part of additive-free 35% hydrogen peroxide with ten parts water.
  • Water infected plants thoroughly. The soil will bubble as the oxygen is released.
  • For pests, water with the mixture twice a week, allowing the top 2 inches of soil to dry between watering. Root pests should subside within a week.
  • For root rot, water plants very thoroughly, then allow the soil to dry. The top 2-3 inches of soil should be completely dry before returning to a regular water regimen. If the process is done correctly, root rot can easily be treated with only one watering of peroxide.

Foliage Pesticide Spray

  1. Mix equal parts 3% hydrogen peroxide and distilled water.
  2. Use a spray bottle to thoroughly soak the infected plants. Make sure to get the undersides of the leaves.
  3. Spray once a week or after it rains. Hydrogen peroxide both treats and further prevents pest infestation.

This weaker solution will prevent damage to the leaves but is effective as a general insecticide. I’ve found that it is effective against a variety of mites and aphids.

Because it also has fungicidal properties, one may find it as a possible solution to mildew and fungus outbreaks.

Water Treatment

For a general water treatment and dechlorinator, mix one tablespoon hydrogen peroxide for every gallon of water used.

The hydrogen peroxide acts instantly to drive out chlorine, excess iron and sulfates.

A Word of Warning

You’ll be pleasantly surprised with the effectiveness of hydrogen peroxide for plants! My one word of caution is to avoid using it in the soil too often. Since it will easily rid your soil of harmful pests, it can also take its toll on beneficial soil organisms.

So, use it wisely and only treat when an infection or rot has been confirmed. Thanks for reading my article. Leave me any feedback or questions that you may have!

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.


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Mollie Newsome

Do I have to have distilled water or can boiled tap water be effective?


Rather than distilled water, would bottled or tap water be ok?


Any concerns or negative results , using HP during flower cycle ? Seeing early signs of PM. Thinking of using HP thru out the GH to eradicate, and prevent outbreak. I assume fans are also contaminated at the point.


Can it work as a complete replacement for water?


Will hydrogen peroxide also prevent the soft rot on Iris planted?


Any recs on a non-additive hydrogen peroxide solution? The only kinds I’m finding are «stabilized» 3% solutions (which I assume means they have additives). Looking to treat my potted plants that have fungus gnats. Thanks!


Can it work against thrips


Fantastic. have read a few things about H2O2. but your instructions and details are the clearest.


Does this mixture work on orchids?


How could i dilute 34% to make a safe foliar spray? What ratio or millilters per gallon? Great article-Thank you!


2 years ago from Colorado

Hi Kathy! Great question. Once the HP is applied to the soil, it will most likely kill any soft bodied insects/eggs/larvae present. The good news is that HP rapidly breaks down within a few minutes and any eggs/insects that come after this time will be unaffected.


I have powdery mildew on corky stem passion vine and read that, once I clean the bad leaves and remove all from the soil that I should treat the top soil with HP/H2O. I’m guessing the zebra butterfly eggs and larvae will die off during the treatment of foliage (not with HP) and soil. Do you have any experience with affects on caterpillars and butterfly eggs?


Very interesting, mate!


Can I use the 3% kind to get rid of soil pests too? What would be the ration to mix it? Thanks!


How can I plant seeds samurai in my home?

carmen pangan

good to know..thank you for the info.


I’m going to try this in my greenhouse as I fear I may have spider mites and definitely gnats. Thank you


What a suprise. Why have we not received this information from our extension agents? Thanks bunches for this inexpensive useful tool


I have lots of tropical plants and dragon fruit plant and orchid cactus is it good to use it on these plants. When ever I take the plant inside for like few wks for the winter they get little bugs crawling and eating the outside of the plant to make the color change to brown and try to heel itself.

Ted Atkinson

Thanks for the hopefully cure of the root rot problen of one of our 6 American Boxwoods.

I will let you know how it does.

judy justice

Can it be used on house plants?


Can I mix the hydrogen peroxide and water and use it for several days or should it be mixed fresh every day? Wasn’t sure if it would deteriate or not.


Thanks man for the assistance, I have done this application before I read this article and it confirm what I did find out was true. I have used peroxide in waste water treatment and it kills the green algae, that is fungal in water or dams.


Interesting article! I have a question, though.

My zinnias have had athids for over a month and I have been spraying them with insecticidal soap whenever I can(we have had so much rain). They now have developed black spot and I am now(not at the same time as the insecticide) spraying them with Eco-PM fungicide by Arborjet. It is a natural nontoxic product safe for people, pets, wildlife and the environment. So, after this long explanation. my question is, if I spray with the hydrogen peroxide mix will this take care of the athids AND the black spot? It would be wonderful if one nontoxic product could take care of both problems.

Appreciate your input.


I’m going to attempt to try this on my African violets. I have over 200 plants and due to reservoir watering I have spread my nematodes. I’ll start with just a few and will report back. Thanks for the tip!


Thank you soooo much


thank you! i just watered my seeedlings with this solution. will see if it perks up the less healthier plants

Alstasan Silvox

Nano silver hydrogen peroxide based disinfectant, fumigant, sanitizer and sterilant. Chemtex Speciality is a worldwide manufacturer, supplier & exporter of ALSTASAN SILVOX.

Shubham Karnani

Hydrogel Polymer marketed by Chemtex Speciality Limited under the name Alsta Hydrogel is a water retaining agent with the capacity of holding up to 400 – 600 times water than its own weight. Hydrogel agriculture or the use of super absorbent polymer for agriculture refers to hydrogel polymer application in soils for the purpose of stably providing water to the plants irrespective of drought and dry seasons. The plants can absorb water from this nontoxic water absorbent polymer throughout. Hydrogel in Agriculture is a potassium based super absorbent polymer acting in drought prone areas and rain-fed agriculture as a water retaining agent.

Diane Brown

2 years ago from Philadelphia

How to use the hydrogen peroxide as an insecticide is very helpful. While I learned about it’s use from another website, you provided detailed information on how to use it. I have started an indoor organic vegetable garden and recently noticed a little molding in the drainage rocks, as well as a few little flying bugs in some (not all) of the plants . After reading your instructions I just bought the hydrogen peroxide and will be following the guidelines you have provided for combining with water. I am very optimistic and look forward to positive results. Thank you for sharing.


Loved this page. Have a great day.


Very interesting..I was told when I bought roses by the clerk to use a cap of peroxide in the water instead of the packet that comes with it. He said it will evev keep my vade clean. so I was curious



Thanks for this article. Will this treatment affect worms in the plant pot?

Khushal chauhan, Simla, INDIA.

After banning chloropicrin and methyle broimde for disinfecting orchard soil prior to replanting apple trees,I was in search of alternative chemical. Iam extermely glad to know about the use of Nano-Silver -Hydrogen -Peroxide, in agriculture for soil disinfection. I feel my problem is solved.

Linda Zee

I put it in my pond when I see string algae. Peroxide kills it off. My pond is about 5000 gallons, I throw about 5 or 6 bottles of standard H2O in it in the Spring and that does the trick. Won’t hurt the fish.


I am doing a project similar to this and I have one out of three plants growing so far with using the perioxide to plant them. I am growing basils, cucumbers,and lettuce. The basil is the only growing.

Anna Owens

Thanks for the tip! I will be trying it out soon.

The dirt worker

Thanks for all the tips


What a great article. Here is another HP trick. I tried soaking my seeds in a 10:1 ratio of Water to HP this year. I used two varieties of basil. Half of the seeds of each type was soaked in just water and the other half was soaked in the HP mixture. The ones soaked in the HP mixture sprouted and grew faster and stronger than those soaked in just water.


Thank you so much for sharing this information!


4 years ago from Colorado

Angel — Hydrogen peroxide will rapidly degrade into water and oxygen once it is applied. As long as you don’t directly spray the bees or butterflies, they will be just fine. Thanks for reading!


I’m new to gardening and have an African Daisy that was gorgeous and I’m pretty sure is being ravaged by fungus now. But will hydrogen peroxide treatments harm bees and/or butterflies? I’d like to avoid that but I want my African Daisy to thrive too. Help!


So happy to find a place with informative and helpful information about using hydrogen peroxide!

Nancy Carles Muir

is the peroxide safe for pets if used this wat?

poppy mercer

5 years ago from London

Lovely clear article. My sedum spectabile suffered rot badly this year due to the wet spring. I’m just about to lift, divide and wound dress with peroxide.


Interesting. I would have never thought of hydrogen peroxide for the garden.

Diana L Pierce

5 years ago from Potter County, Pa.

Good tips I have not heard of using peroxide for plants before, but I know it has many household uses. Lucky for us it is still inexpensive.


6 years ago from Colorado

Jen Dittrick — A diluted foliar spray should work just fine for your flowers. Just make sure that the solution is not too strong, or else it could potentially burn the leaves.

Jen Dittrick

6 years ago from Yorkton, Saskatchewan

I know this is an older post but I just found it through Pinterest. It’s been repinned. 🙂 Anyway, I am very interested in using this method. Is it safe on flowers?? I plant Dahlias and was wondering if I can spray my Dahlias with the peroxide to get rid of the pests that always chew the leaves and petals.

Samuel Barrett

6 years ago from Douglas County, Oregon

seems to have a million uses! you can treat a pond with it to to oxygenate it!


This is truly amazing! I do not have aphids now, but if I do, I’m heading straight for the HP. I have heard, however, that hydrogen peroxide is a good cleanser for toothbrushes. Thanks for this valuable information. If I understand correctly, we must use a 10 to 1 mixture. (Voting up and useful)


Could you use as a vegetable wash? Can’t wait to try on problems don’t have any as of yet so far so good. Thank you

Judy Specht

6 years ago from California

The hydrogen peroxide worked like a charm. Washed the larva off the underside of the leafs nicely.


6 years ago from Colorado

Probably not. Curling of the leaves can be caused by numerous different symptoms. It’s best to try to isolate the issue before treating.

Elaine Baldwin

Will HP help with curly leaf problems?


6 years ago from Colorado

Besides haggard being my favorite word, it sure is the perfect way of describing how insects look after the Hydrogen Peroxide treatment! I’m glad it worked out for you. Feel free to share and link all you want! Thanks for reading.

Judy Specht

6 years ago from California

Also would like to share and link to my garden hubs if you don’t mind.

Judy Specht

6 years ago from California

Splendid hub. Am battling squash beetles. Just tried washing the larva off with peroxide. The only actual beetle I found looked haggard. Hopefully this will take care of the problem. Voting up and useful.

Fred Bohman

7 years ago from Orange County, CA

Very interesting, organic is definitely the way to go. Great hub.


If the peroxide as a water treatment drives out chlorine, lead, etc. where do they go? Really, this sounds sarcastic, but I don’t know.


Thanks for this look at using hydrogen peroxide for plant health. It’s news to me.


Okay Cool! I wasn’t sure if hair peroxide was a little different..

Hopefully my gnat infestation is on its way out. Thanks!!

Btw, I found you through Pinterest and you were re-pinned 🙂


7 years ago from Colorado

Both 30 & 40% peroxide can be used. Just be sure to dilute the mixture down to about 3-4% hydrogen peroxide. This can be accomplished by mixing one part peroxide with 10 parts water. Thanks for reading and good luck with those gnats!


Can I use peroxide bought from the beauty supply, say 40 vol. cut down or even the 30 vol.? If so, how would you dilute it (ie measurements)

I would really like to try this as I have the Fly Gnats in my plants and can’t get rid of them! 🙁


Wow! This is a truly excellent Hub! I think I will use this on my indoor plant. I transplanted and the new soil sucks. It now has some root rot I believe and this might be the answer!


7 years ago from Louisiana, Idaho, Kauai, Nebraska, South Dakota, Missouri

Great helpful tip. I have never heard of this so I’ve learned something new. Thanks very much.


I use the dish soap trick to keep pests off my trees and strawberries but my lawn keeps getting invaded with grubs from my neighbors. Will this work on grubs in a lawn?


7 years ago from Colorado

Brazzy — When hydrogen peroxide is added to the soil, it will degrade all soft tissues, including those of beneficial earthworms. For this reason, I recommend applying peroxide only to container plants if you’re worried about the safety of your earthworms. Your herbs will be fine. Thanks for reading.


The peroxide is good for getting rid of some worms as noted, but how will it affect the good worms that I want in my soil? I don’t have space for fruit or veggies, just some flowers. I have some herbs growing but no worms to worry about in those containers.


7 years ago from Washington

I’ve been telling people this for years. thank you!


Not only is hydrogen peroxide great for your garden, but also the gardener. Use 3/4cup in your bathwater to alleviate aches, pains and help with a cold or flu symptoms. I have been using peroxide for over 20 yrs to clean my house, maintain my garden and ease aches and pains. It is the most versatile bottle in my house. Even better than 35% is 100 volume, purchased from certain beauty supply companies.


Absolutely fantastic article. Very informative and knowledgeable. Thank you for saving everyone $$

Gillian Namele

7 years ago from Complicated

Well, there is always the first time. Will try it. Thank you for the information. Voted up!

Jill Spencer

7 years ago from United States

Good to know! Will have to try it. Thanks! (Voted up & useful.)


8 years ago from Colorado

leann2800 & — I’m glad that you both were able to find this helpful. I hope that it helps you fight those pesky critters in the garden!

Great information. I am going to try it in my garden in the spring. Thank you for being so informative.


I have heard of a lot of household chemicals for the garden but not this one. Thanks for sharing.

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Benefits Of Cinnamon On Plants: Using Cinnamon For Pests, Cuttings, & Fungicide

Cinnamon is a wonderful flavor addition to cookies, cakes and any number of other foods, but to gardeners, it’s so much more. This versatile spice can be used to help root cuttings, to prevent fungus from killing small seedlings and even for keeping pests away from your home. Once you learn how to use cinnamon powder for plant health, you’ll think twice about grabbing harsh chemicals for your gardening needs.

Benefits of Cinnamon on Plants

The benefits of cinnamon on plants is widespread and you may end up reaching for the spice almost daily. Here are some of the most common uses of cinnamon in gardens:

Cinnamon for pests

If you have a problem with ants in your home or greenhouse, cinnamon is a good deterrent. Ants don’t like to walk where cinnamon powder lays, so summer ant problems will be decreased.

Use cinnamon for pests inside and outside your house. Find their entryway and sprinkle cinnamon powder in the path. Cinnamon won’t kill the ants in your home, but it will help to keep them from coming inside. If you have a problem with ants in your child’s sandbox, mix a container of cinnamon powder with the sand, mixing it well. Ants will steer clear of the sand.

Cinnamon as rooting agent

Cinnamon as a rooting agent is as useful as willow water or hormone rooting powder. A single application to the stem when you plant the cutting will stimulate root growth in almost every plant variety.

Give your cuttings a quick start with the help of cinnamon powder. Pour a spoonful onto a paper towel and roll damp stem ends in the cinnamon. Plant the stems in fresh potting soil. The cinnamon will encourage the stem to produce more stems, while helping to prevent the fungus that causes damping-off disease.

Cinnamon fungicide control

Damping off disease is a fungus-based problem that hits small seedlings just as they begin to grow. Cinnamon will help prevent this problem by killing the fungus. It also works with other fungal problems exhibited on older plants, such as slime mold and with deterring mushrooms in planters.

Take advantage of cinnamon fungicide control by making a cinnamon spray for plants. Stir some cinnamon into warm water and allow it to steep overnight. Strain the liquid through a coffee filter and put the results into a spray bottle. Spray the stems and leave of affected plants, and mist the potting soil in plants that have a mushroom problem.

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