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Why mold on Cuttings more often appears at the nodes or bruises

I have some cuttings that I have scrubbed, then washed with 10% bleach and then with rubbing alcohol but the mold keep on coming back even when just stored in the fridge, and it always comes on the nodes and tiny bruises on the cuttings. One may say that these are the hiding places for bacteria causing mold but would the bleach and rubbing alcohol not take care of it?
I am afraid to start the baggie (warm and humid) method with these cuttings because then I would have to nurse these twice a day to clean the mold. Can I avoid mold by totally burying these in Perlite/Vermiculite mix or alternatively only in 'sterile' soil for rooting? Or then it will become a case of out of sight mold and eventual rotting?
The cuttings wood appears to be younger than two years (and on the greenish side).
Could it be that moisture or someting oozes out of the node or bruises area causing the mold at these points or just the bacteria is out of reach of the cleaning solutions at these areas?
Will frequent cleaning with the above solutions make the cuttings unable to root later?

Make sure, your refri8gerator5 is set at about 35-40 * F.
Get a termometer and test it.
If it is over 40*F,that is why mold grows.
You have to set it colder.
Hi Akram

I have had little luck getting rid of mold once it started.  I have had it return in as little as 12 hours after being washed in strong solution.  My best luck (actually my only luck) with this method of rooting was with cuttings I soaked frequently.  I use hydrogen peroxide instead of bleach (EDIT: I mentioned that for information purposes only and not to suggest hydrogen peroxide solution is better than bleach solution)

~james

Herman
My fridge is at 3 deg C (approx 37F). I believe the mold has something to do with the nature of these specific cuttings. Either these specific cuttings have something inherent (within the bark) that make them easy mold prone despite the frequent cleanings, or these are inherently missing something that inhibits or decelerate mold. Other cuttings under the same conditions are staying mold-free clean.
Anyway it still helps in giving some lesson in keeping expectations realistic. You root some you lose some.

I will echo Ottawan. If I put 4 or 5 different varieties of cuttings in the same bag, some get moldy almost instantly, and other never have a hint of a problem. I generally have more problems with cuttings I receive from back east, than I do with my own cuttings. Not bragging, just observing. So some locations and/or some varieties may just have inherently more issues. On cupped cuttings, of late, I have been squirting the mold off, and then leaving the rooting box open to they dry out and have less issues.

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