Proof: 3% Hydrogen Peroxide is safe on leaves

After not being able to find the information I need, I did my own experiement and will share the results with everyone.

Q: Is Hydrogen Peroxide at 3% safe for leaves?

I found a male plant and decided to use it as my test subject.

I put 200 mL of 3% H2O2 in a sprayer and
very generously drenched the whole plant.
There was no visible "fizzing" of the H2O2 on plant
Ten minutes after application, plant was dry.

Now, let's see what happens

Why would you need to spray your leaves with hydrogen peroxide?

VolimPicke said:

After not being able to find the information I need, I did my own experiement and will share the results with everyone.

Q: Is Hydrogen Peroxide at 3% safe for leaves?

I found a male plant and decided to use it as my test subject.

I put 200 mL of 3% H2O2 in a sprayer and
very generously drenched the whole plant.
There was no visible "fizzing" of the H2O2 on plant
Ten minutes after application, plant was dry.

Now, let's see what happens

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Cool who said it wasn't?

I read it’s a good way to get rid of mold or fungus and help with root rot

Lordhooha said:

Cool who said it wasn't?

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Online there are all sorts of contradictory opinions.
Since there is lots of BS online, I thought I would do my own experiment.
Maybe a few others can replicate the experiment with their male plants.

Checking an hour after you spray won't really show anything anyways.

24-48hrs we use as a basis for foliar spray damage signs to appear

Still looks OK 24 hours later

You can spray 3% into your mouth and be perf fine. If it is ok to put it in your mouth you can put it on the plant...to an extent haha.

They say you can drink urine too but I'll leave the testing to you

If you have an infection in your mouth. They require you to swish and gargle 3%. Spit not swallow.

Herb & Suds said:

They say you can drink urine too but I'll leave the testing to you

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Is it necessary for me to drink my own urine? Probably not, but it’s sterile and I like the taste.

But I love hp for all kinds of purposes in the lab. Kill insect larvae in the roots, spray to kill any mold on top of medium or pot, clean up tent after PM, I could go on.

VolimPicke said:

After not being able to find the information I need, I did my own experiement and will share the results with everyone.

Q: Is Hydrogen Peroxide at 3% safe for leaves?

I found a male plant and decided to use it as my test subject.

I put 200 mL of 3% H2O2 in a sprayer and
very generously drenched the whole plant.
There was no visible "fizzing" of the H2O2 on plant
Ten minutes after application, plant was dry.

Now, let's see what happens

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Nothing to prove have been spraying on plants for yrs? It can be used all the way thur flower thats why i love it.

xtsho said:

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Fightclub

Failmore said:

If you have an infection in your mouth. They require you to swish and gargle 3%. Spit not swallow.

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Chlorhexidine gluconate works better.

Ive used it as a root drench in coco a few times to kill some stuff, i usually dilute it 4:1 with distilled water. Is this to say i might not have to dilute it?? I still get the fizzies even when it's diluted.

Great looking plants BTW

Failmore said:

You can spray 3% into your mouth and be perf fine. If it is ok to put it in your mouth you can put it on the plant...to an extent haha.

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Yes you can because humans have emzymes in their cells that prevent H202 from doing damage.
Plants, insects and molds do not have these emzymes and therefore H2O2 can damage them.

Flork said:

Chlorhexidine gluconate works better.

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What is the difference in price between H2O2 and Chlorhexidine gluconate ?

PopAndSonGrows said:

Is this to say i might not have to dilute it??

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My experiment was on leaves and not on roots.
To test if I can use it to kill powdery mildew or other things without harming plant.
Someone else will need to do an experiment with H2O2 for root usage.

PopAndSonGrows said:

Great looking plants BTW

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You can thank God or Mother Nature since I am a minimalist - that is I do the basics

48 hours later, alive and well.
There you go - proof that 3% hydrogen peroxide on leaves is safe

VolimPicke said:

Yes you can because humans have emzymes in their cells that prevent H202 from doing damage.
Plants, insects and molds do not have these emzymes and therefore H2O2 can damage them.



What is the difference in price between H2O2 and Chlorhexidine gluconate ?



My experiment was on leaves and not on roots.
To test if I can use it to kill powdery mildew or other things without harming plant.
Someone else will need to do an experiment with H2O2 for root usage.




You can thank God or Mother Nature since I am a minimalist - that is I do the basics

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The problem with H2O2 is it is extremely fugitive to both water and light. That extra Oxygen molecule pops off almost immediately in the sun. So essentially of course it's not damaging them because you sprayed them with water. Last time I looked water won't kill much of any of our pests. That's why H2O2 comes in dark bottles.

I use Marrone Regalia. If you're organic it is too. It's from a Reynoutria sp. (I'm not organic).

About the only thing I use H2O2 for is a rescue when I've over watered a soil plant. (I have a Kaffir Lime that was in soil). Good luck and that plant is lovely looking.