Unbelievable Hydrogen Peroxide Uses In Garden You Should Know

Is it possible? Are there Hydrogen Peroxide Uses in the garden? Well, yes, it can be useful! Read on to find out how.

How & Why Hydrogen Peroxide is So Useful

Hydrogen peroxide (H2O2) has an extra oxygen atom than Water (H2O), this extra oxygen atom breaks down and the molecule of water releases from this separately. It is this extra oxygen atom that makes the hydrogen peroxide so useful. The Hydrogen peroxide is used in cleaning, bleaching, sterilizing, as a disinfectant etc. but it can also be used in horticulture. In simple words, Hydrogen Peroxide acts as an oxygen supplement for plants (beneficial if used in low strength). It works by releasing oxygen and also aerates the soil.

Here’s a very helpful article if you like to read.

Hydrogen Peroxide Uses

1. Hydrogen Peroxide Uses Against Root Rot

Overwatering causes the shortage of Oxygen at the root zone. If you overwater the plant, the water fills the air spaces in soil and the plant’s roots suffocate due to the lack of air and they begin to die after 24 hours. To save such a plant from this problem, water it thoroughly with 3% hydrogen peroxide mixed in 1 quart of water. The extra oxygen in the hydrogen peroxide provides the roots their much-needed oxygen to survive. After this, don’t water the plant until top 1 or 2 inches of soil dries out well.

Read more about this here

2. Using Hydrogen for Faster Seed Germination

Using hydrogen for faster seed germination

You can use hydrogen peroxide to help seeds germinate more quickly. Hydrogen peroxide softens the coat of seeds and kills any pathogen present on seed coat thus increase the germination rate and help the seed germinate faster. Soak your seeds in a 3% hydrogen peroxide for 30 minutes. Rinse the seeds several times with water before planting and plant them as usual.

3. Hydrogen Peroxide for Mold and Mildew

Hydrogen peroxide has an oxidizing property that is fatal for mold and mildew. Mix a liter of water with 10 tablespoons of 3 to 6% hydrogen peroxide depending on the level of infection. Spray this solution on plants daily until the fungus disappears.

4. Hydrogen Peroxide as a Fertilizer

Watering flowers

Use hydrogen peroxide to help strengthen the root system of your plants. Hydrogen peroxide has one extra oxygen molecule (than water) that helps plant’s roots to absorb nutritions from soil more effectively, you can use this formula occasionally to boost the growth– Mix about 1 teaspoon of 3% Hydrogen peroxide with 1 gallon of water.

*Read more about this on eHow here.

Caveat: Make sure that you do not use more concentrated hydrogen peroxide as it can kill plants. 3% strength is the most familiar concentration and usually recommended.

5. To Keep Pests Away

Keep pests away with hydrogen peroxide

The hydrogen peroxide can be used as a pesticide. Spraying the plant thoroughly with 3% hydrogen peroxide mixed in the equal amount of water kills the pests and their eggs. The hydrogen peroxide also kills the bacteria that develop on fruits and vegetables.

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Is it possible? Are there Hydrogen Peroxide Uses in the garden? Well, yes, it can be useful! Read on to find out how.


    • I sub to a couple of YouTube orchid channels. Both use H.P. often: whenever a cut needs to be made, for tiny snails and slugs that get in, for fungus, root rot, etc.
      Stick with 3% and most plants will be OK. Not sure about African Violets or other very tender ones.

  1. I put worms in my flower beds because here in Ms. the soil has a lot of clay the worms crawling around (I bought the at a fish bait stand) keep the soil from getting to packed and they leave good fertilizer.

    • Worms deodorise very well. Put them in there and the next day it should be fine.
      I like worms in my compost. My whole garden is a compost heap of mulch. I have heavy black soil that compacts hard. Worms break it up after a while and it becomes sweet smelling and crumbly.
      Kind regards

      • It sounds like you have a wonderful gardening soil to work with! I only wish that I could get my soil up to par It has rocks and is so compacted and it’s graded on a sloop which I find it very difficult to make it useful for planting things especially a fruit tree. Any suggestions would be greatly appreciated!

    • Will the mixture work on killing mold and mildew under kitchen sink and rotted wood? What do I use to kill a climbing vine weed outside of house that grows from underneath the closed in porch and can’t get to roots? Thanks Cindy

      • Try one gallon of vinegar 1 cup salt 2 tablespoos dish liquid. But don’t spray on anything you don’t want killed. Spray whe it’s not going to rain. Do it again in a couple of days. This works for me. With poison ivy.

    • would like to know as well… I have been wanting to make some containers to catch rainfall because we are always in a drought in south Texas. So far I have read articles of people using gold fish to eat the larva, some have used a fish tank bubbler to a movement on the water surface to prevent mosquitos from laying their eggs. if HP works on killing larva, I would think this is the easiest and cheapest route.

      • Hi-Try covering as much as you can if possible, a little bleach is used in livestock troughs, can also put things that float (ball, bath toy-to try to keep surface moving-we use them in winter to help prevent ice in horses trough when no electric avail.). or maybe screen lid, lemongrass plant or wind chime or spinner (last 2 they’re just my guesses).

    • Try fish in the water. They eat the larvae. My pond is so free of mosquitoes thanks to them.
      the pond pump helps to oxygenate the water. It is clear, The fish are healthy. I am growing plants in there too. Beautiful waterlilies especially.

    • Or add a few table spoons of cooking oil, To the standing water. The oil spreads out and floats on top of the water and suffocates the mosquitoes . Won’t harm plants or animals…amd super cheap.

  2. I live in central Florida and I have used Hydrogen peroxide (bought in grocery store) for over a year in my bubbling water feature and it does keep the water clean, no nasty green stuff. I have to add 8 oz to the pot holding the water (4-5 gallons) once a month as I also have to add water that evaporates.

  3. This may be too much info, but judging from the questions; some may benefit
    1. there are 2 commercially available strengths of “peroxide”: 3% and 20%.
    3% is the one referred to in ALL of the
    references to in gardening. For example, it was stated using 1 tsp per gallon of water, but there are many variables to this: how long has the mixture been sitting since it was mixed? Has the mixture been sitting in the shade of sun? Hydrogen Peroxide is a relatively unstable compound I.e., it has an extra oxygen atom that it does not want: H2O2 very quickly breaks down into water (H2O) plus one atom of oxygen (O). Ever notice when cleaning a wound using peroxide (always the 3%!) that bubbles are released…those are the extra oxygen atoms forming the bubbles (which kill bacteria & help to clean the wound). That quick formation of bubbles shows just how “unstable” H2O2 is, to be of benefit, a mixture should be used quickly.

    There are many beneficial uses of peroxide (ask your pharmacist); HOWEVER; unless you intend to bleach your hair,NEVER have the 20% strength in your home…it can cause burns & can be deadly if ingested.


    • I’ve had inclinations to use it but was afraid it would burn the leaves…My ivy has been sad after she got too much rain on her pot. You think she can take it?

    • Yes, HP is a very practical product to keep around the house for cleaning–for soaking seeds before planting thereby getting a better germination and also ridding molds that commonly occur on seeds right after planting. Hydrogen peroxide is excellent for certain infections including staph–but never use peroxide on a gap wound or a deep puncture injury. In these cases the peroxide will disinfect, but also it will keep the wound from closing back up properly. Farmers often have made this mistake using it on minor wounds of animals but then using it on horses or cows that have deep punctures–in these cases it may even keep the injury from healing because the flesh will not grow back properly. It has been used successfully for cancer by patients and even some MD’s. The atom of oxygen that separates from the molecule when taken internally does the same thing that white blood cells do when a person has an infection—white blood cells produce peroxide to heal.

    • HP can be used to help rid white flies and also mold. It often leaves brown spots on leaves and may wilt leaves slightly–these symptoms dissipate quickly and the plant or shrub usually receives quite a benefit.

      • Always use it at the proper dilution rate. I am not recommending the use of it when I talk about the various ways it has been used-simply disclosing information.

  4. I use it in my Koi pond to help keep the gravel bottom clean, it doesn’t harm the fish or pond plants used correctly.

  5. Diatomaceous Earth (I use food grade only)kills ALL Insects, including beneficial ones- dont use in soil you want earthworms to live in, and not around FLOWERS- bees will get killed too ! I sprinkle it very carefully on lower leaves of my food plants not on the flowering parts – love the Hydrogen Peroxide info though ! Will TRY !

  6. Hi, different subject than gardens. Could HP be used (larger quantities) in a small 2 person hot tub, rather than the strong chemicals?

  7. I use hp that is used for swimming pools and spas 50% 10 mils to 160 mils water 100 mils will make 1.6 liters at approx 3% works well I get mine from good splash Newcastle NSW never had any problem with it

  8. I have used the 3% for years. I just pour some like a fourth of a cup in a gallon of water and go watering plants. I have revived plants that looked almost dead. My rose bush started blooming like crazy. I have heard you can put it on your lawn. I didn’t know about it getting rid of white flies so I will have to try it on my lemon trees. It should not hurt you to drink a little because I have had a dentist tell me to rinse with it. It really works.

  9. I used 1 bottle (3%) (400ish ml) in my hydroponics jar, for my herb (oregano) 4 parts to 1 part water. Its been 24hrs, no signs of any ill effects on the leaves, stems, or roots.

    Reason I did that is because it showed signs of root rot.
    at the end of the day, after all the O2 is released, you are just left with H2O (aka water) .. I’m curious if i can drink it :D … the 97% of the mixture IS distilled water.. probably not a good idea since its acidic.

    Does anyone know the PH reading on HP?

  10. Powdery mildew can be counteracted with a combination of baking soda and canola oil. Of if desired the canola oil can be used alone. 1 tbs of baking soda pr gallon of water with 2.5 tbs of canola oil. The oil suffocates the mildew. Many types of oils are used for row crops as well.

  11. My jade plant got white flies. I got lucky having found a tiny ant queen and let her loose in jade plot. She had mated yea! So her colony grew and they ate or drove out the fly’s. Occasional drop of honey keeps them out of your cabinets. At home entomologist. Lol.


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