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  #11  
Old 10-11-2019, 10:00 AM
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Originally Posted by SaraJean View Post
...That’s why I was wondering if there was some science behind in or if was more of a “well that’s the way we’ve always done it” type of thing. I have no idea where the notion for actually submerging the orchid came from, I suppose the thought was if you can drench the pot you might as well throw the whole orchid in? ...
(Thanks for pulling this out, by the way! I figured o would get lost in that post after I wrote it)
Sounds like we're on the same page, which is why I put it out there. Been wondering the same for years. Personally, I think it's of the "well, that's the way we've always done it" school of thought. Quite a few folks still insist on peroxide for wound care. Have a friend who's a wound care specialist whose lecture on NOT using H202 has been heard by me too many times to remember.

My grandma insisted on putting butter on a burn. Never argue with your grandma.
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  #12  
Old 10-12-2019, 03:30 AM
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I think the origin was hydroponic growing. I saw higher concentrations of H2O2 at the hydroponic store, to be used diluted in the reservoir.

I use 3% first aid strength to clean off mold on the exterior of terra cotta pots.
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  #13  
Old 10-12-2019, 05:14 AM
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I don't see it having much use for orchids. I did find 3% to have some utility in preventing the fungal disease known as "damping off", which causes plants to rot right at the soil line when growing Mesembs, a family of succulents very prone to the disease. I simply watered normally with the peroxide. However I found that germinating them outdoors in full sun was even more effective, probably due to a combination of air movement and UV exposure.
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  #14  
Old 10-26-2019, 02:45 PM
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I did some peer reviewed literature searches awhile back and couldn’t find any information backing up peroxide use as an effective antifungal or soil oxygenator. I was able to find information on tissue damage, mostly related to why it is no longer used in wound care.

I have used it to treat crown rot in a few Phalaenopsis because it made sense to me that killing all the exposed rotting tissue could be a good thing. I also dried out the excess peroxide and packed the crown with cinnamon. I did save the three plants that I caught early. I wonder if it was more due to the desiccating action of the cinnamon?
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Old 10-27-2019, 05:29 AM
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I was once on the 'bandwagon' of hydrogen peroxide, which was based on reading about people's usage of it.

But I don't use it anymore - mainly because I ended up finding I already have methods (not involving H2O2) of treating relevant orchid issues (or pre-treating orchids) when needed, and secondly - it just 'seemed' that while application of 3% H2O2 didn't kill any of my orchids that came in the post --- it appeared (due to observations) that it affected the roots and/or plant in some way ----- as in it took a relatively long time - several months - of the plant doing nothing - suspended activity, before the roots and/or plant was able to get going again. It just appeared to me that H2O2 was holding something up --- with the plant, as if the roots or plant needed to recuperate from its effects.

Sometime - in the future- I will probably get around to doing a bunch more observations - comparison tests, as I haven't got any way to 'measure' what's going on at microscopic levels. Hopefully some sources or studies can be found to save us the time to look into this.

Also --- thirdly, I read that once a new bottle of H2O2 is opened ----- degradation of H2O2 begins to occur, creating another possible drawback.

I'm not opposed about the usage of some product, like H2O2 - as long as there's some good and proper evidence that supports it. I don't use it anymore though - not for the purpose of diluted sprays on orchids that is.

Last edited by SouthPark; 10-27-2019 at 04:11 PM..
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