Using hydrogen peroxide solution on my trees. | Bonsai Nut

28 Jul.,2025

 

Using hydrogen peroxide solution on my trees. | Bonsai Nut

Hi all,
I thought id bring up the subject of hydrogen peroxide on plants.Ive had excellent results with this stuff over the past 20 odd years
and i wanted to share the benefits of using it on my bonsai etc.

‏Hydrogen peroxide is a chemical compound with the formula H202. Surprisingly, it contains one extra oxygen molecule than water.
This extra oxygen molecule creates a strong and powerful oxidizer that’s capable of killing bacteria and viruses. ‏

When it comes to plants‏, an HP solution is much more beneficial than just plain water. You may have noticed
that plants respond better to rainwater than tap water.
One of the reasons for this is that rain water contains more oxygen than tap water. ‏
‏Interestingly, HP replicates the natural substance found in raindrops that is so good for plants so when applied, your plants will soak it up
the same way they do with rainwater (i always notice a boost to the foliage colour after use).‏

‏So, just like rainwater, HP releases and supplies oxygen to the plants and the soil. ‏
‏It supports the health and growth of plants and the extra oxygen molecule in HP is what encourages healthy root growth.‏
‏HP, when mixed at a higher rate, also has the ability to eliminate soil fungus, spores, and mould.
It also works very well on fungus gnats AND their eggs. Just give the soil a good soaking with your HP solution,let the soil dry somewhat and
repeat the process if necessary.
HP also works very well on red spider mite.The oxidizing action of the extra oxygen molecule dessicates them and it breaks down the protein encasing their eggs too...win win.
It has also been my experience that seed strike rates and germination time improve when using HP.
Either soak the seed in an HP solution prior to sewing or alternatively, water the seeds in with it (at the 1/. mix rate mentioned below‏).
It really is awesome stuff and it costs bugger all.It has so many advantages when used on your bonsai trees...and remember, the key to its use is always
MODERATION.

Can hydrogen peroxide hurt plants you ask?
‏HP will only hurt plants if the solution is not diluted down or is too strong. Another reason it could cause harm is by using too large quantities
of the product. Therefore, using hydrogen peroxide on plants will not hurt them as long as the solution is sufficiently diluted, and you use it in moderation. ‏

‏How much hydrogen peroxide for plants?‏
‏When using hydrogen peroxide on plants, for most purposes, you should use the same 3% solution that you use in the home. You can find this potency in most
supermarkets and chemists.
You can also buy a 35% solution but ive never used this as i find it easier and less dangerous to use the 3% product.

I have great success by mixing at the following rates (3% solution)....

1/.General spritzing, boost to overall health (can be used with a mist sprayer for a direct foliage hit or applied directly to the soil) and seed germination.
2 x plastic coke cola bottle cap to 1 litre of water.

2/. For root rot,mould,fungus and pests -
1 x plastic coke bottle cap of hydrogen peroxide to 250ml water.

I tend to go just a little on the lean side with the mix rates so a higher dosage is probably ok but i would experiment first of course.
I get awesome results with the current mix rates mentioned above.

And ALWAYS remember (as with anything) MODERATION is the KEY. I use HP every 3rd to 4th watering and the results are A1.

Cheers all - Emeraldtarpon.
Hi all,
I thought id bring up the subject of hydrogen peroxide on plants.Ive had excellent results with this stuff over the past 20 odd years
and i wanted to share the benefits of using it on my bonsai etc.

‏Hydrogen peroxide is a chemical compound with the formula H202. Surprisingly, it contains one extra oxygen molecule than water.
This extra oxygen molecule creates a strong and powerful oxidizer that’s capable of killing bacteria and viruses. ‏

When it comes to plants‏, an HP solution is much more beneficial than just plain water. You may have noticed
that plants respond better to rainwater than tap water.
One of the reasons for this is that rain water contains more oxygen than tap water. ‏
‏Interestingly, HP replicates the natural substance found in raindrops that is so good for plants so when applied, your plants will soak it up
the same way they do with rainwater (i always notice a boost to the foliage colour after use).‏

‏So, just like rainwater, HP releases and supplies oxygen to the plants and the soil. ‏
‏It supports the health and growth of plants and the extra oxygen molecule in HP is what encourages healthy root growth.‏
‏HP, when mixed at a higher rate, also has the ability to eliminate soil fungus, spores, and mould.
It also works very well on fungus gnats AND their eggs. Just give the soil a good soaking with your HP solution,let the soil dry somewhat and
repeat the process if necessary.
HP also works very well on red spider mite.The oxidizing action of the extra oxygen molecule dessicates them and it breaks down the protein encasing their eggs too...win win.
It has also been my experience that seed strike rates and germination time improve when using HP.
Either soak the seed in an HP solution prior to sewing or alternatively, water the seeds in with it (at the 1/. mix rate mentioned below‏).
It really is awesome stuff and it costs bugger all.It has so many advantages when used on your bonsai trees...and remember, the key to its use is always
MODERATION.

Can hydrogen peroxide hurt plants you ask?
‏HP will only hurt plants if the solution is not diluted down or is too strong. Another reason it could cause harm is by using too large quantities
of the product. Therefore, using hydrogen peroxide on plants will not hurt them as long as the solution is sufficiently diluted, and you use it in moderation. ‏

‏How much hydrogen peroxide for plants?‏
‏When using hydrogen peroxide on plants, for most purposes, you should use the same 3% solution that you use in the home. You can find this potency in most
supermarkets and chemists.
You can also buy a 35% solution but ive never used this as i find it easier and less dangerous to use the 3% product.

I have great success by mixing at the following rates (3% solution)....

1/.General spritzing, boost to overall health (can be used with a mist sprayer for a direct foliage hit or applied directly to the soil) and seed germination.
2 x plastic coke cola bottle cap to 1 litre of water.

2/. For root rot,mould,fungus and pests -
1 x plastic coke bottle cap of hydrogen peroxide to 250ml water.

I tend to go just a little on the lean side with the mix rates so a higher dosage is probably ok but i would experiment first of course.
I get awesome results with the current mix rates mentioned above.

And ALWAYS remember (as with anything) MODERATION is the KEY. I use HP every 3rd to 4th watering and the results are A1.

Cheers all - Emeraldtarpon.
Thank you for sharing your H2O2 experiences. You will find a lot of us here use peroxide and you might want to look up past discussions in the archives.
I personally use rates at higher concentrations than you advise, but of course it is best to be cautious and I can appreciate that.
In seed germination, not only does it soften the seed coat a bit to help the radicle emerge, it also helps loosen the flesh of berries and drupes to allow for easier seed cleaning while sterilizing the seed surface. It also prevents mold from forming on seeds being stratified.
In the case a preventing or curing root rot, it is superlative and I have used it thus to great advantage. And as you have stated, it is useful for helping with spider mites and fungus gnats both as a curative and especially as a preventative.
I use the 3% drugstore variety too and I am looking at 4 bottles now. I guess I better go pick up a few more soon.
I also use it for personal health issues like dental hygiene, and several household chores. I wash all my fresh fruits and vegetables with a peroxide solution and I pour it full strength down the drain to eliminate smells and to help keep drains clear while supplying an aerrobic best for my septic system. There are a lot more uses but I will stop here because this is about plants.
Thank you for sharing your H2O2 experiences. You will find a lot of us here use peroxide and you might want to look up past discussions in the archives.
I personally use rates at higher concentrations than you advise, but of course it is best to be cautious and I can appreciate that.
In seed germination, not only does it soften the seed coat a bit to help the radicle emerge, it also helps loosen the flesh of berries and drupes to allow for easier seed cleaning while sterilizing the seed surface. It also prevents mold from forming on seeds being stratified.
In the case a preventing or curing root rot, it is superlative and I have used it thus to great advantage. And as you have stated, it is useful for helping with spider mites and fungus gnats both as a curative and especially as a preventative.
I use the 3% drugstore variety too and I am looking at 4 bottles now. I guess I better go pick up a few more soon.
I also use it for personal health issues like dental hygiene, and several household chores. I wash all my fresh fruits and vegetables with a peroxide solution and I pour it full strength down the drain to eliminate smells and to help keep drains clear while supplying an aerrobic best for my septic system. There are a lot more uses but I will stop here because this is about plants.
Youre welcome penumbra...this stuff is amazing to say the least.
Its really good to hear a lot of nutters are onto the benefits of HP...and im not suprised to be honest.
I was wondering....at what rate do you mix yours?
Thank you for sharing your H2O2 experiences. You will find a lot of us here use peroxide and you might want to look up past discussions in the archives.
I personally use rates at higher concentrations than you advise, but of course it is best to be cautious and I can appreciate that.
In seed germination, not only does it soften the seed coat a bit to help the radicle emerge, it also helps loosen the flesh of berries and drupes to allow for easier seed cleaning while sterilizing the seed surface. It also prevents mold from forming on seeds being stratified.
In the case a preventing or curing root rot, it is superlative and I have used it thus to great advantage. And as you have stated, it is useful for helping with spider mites and fungus gnats both as a curative and especially as a preventative.
I use the 3% drugstore variety too and I am looking at 4 bottles now. I guess I better go pick up a few more soon.
I also use it for personal health issues like dental hygiene, and several household chores. I wash all my fresh fruits and vegetables with a peroxide solution and I pour it full strength down the drain to eliminate smells and to help keep drains clear while supplying an aerrobic best for my septic system. There are a lot more uses but I will stop here because this is about plants.

I know this question has been raised up before - @0soyoung answered if I am not wrong - but will the peroxide in those low percentage dilutions be harmful to mychorrizae specilly in pines?
I´ve been using it for years, but always avoiding it hitting the soil on pines and junipers.

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