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I try to germinate stone fruits often in the fridge, inside a bag of peat moss. When I prepare the peat medium I wet it with rain water, but often the seeds/kernels rotten. I was wondering if I could soak the seeds in 10% bleach solution or even use the same solution to wet the peat moss instead of rain water. Could the bleach at that concentration hurt the germination?

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The amount of water in the sealed bag is critical; very little is needed. Also peat might be a poor choice for the packing material - peat is good at holding quite a lot of water, but what is needed is just a light spritzing which would cover the exterior surface of an inert material like perlite or sand. Using bleach could be counter productive - if it is used make sure to allow the chlorine gas to fully escape before sealing the bag.

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Peat and rain water are not sterile, so anything which can grow at the fridge temperature (including moulds) will do so.

While the seeds/kernels are cold they are dormant, so they don't need water. Try just sealing them "dry" in a plastic bag.

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    I believe he is trying to sprout them in the refrigerator.
    – blacksmith37
    Commented Dec 22, 2020 at 19:58
  • Indeed @blacksmith37, I'm trying to germinate seeds that require some cold stratification.
    – ammoun
    Commented Jan 9, 2021 at 19:57

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