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  • 2 Post By Diane
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fungus in potting mix - is mix useable and if so how?

This is a discussion on fungus in potting mix - is mix useable and if so how? within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Hi all, I was going to repot a couple babies today (well, they were babies ...

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  1. #1
    dwllama is offline Junior Member
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    Default fungus in potting mix - is mix useable and if so how?

    Hi all,
    I was going to repot a couple babies today (well, they were babies two years ago when I got them, it's finally time for them to move up to a bigger pot!) and I dug out my bag of paph and phrag mix that has been hanging out on my back (enclosed, 3 season) porch all winter. Unfortunately when I opened it I noticed little grey fuzz balls all throughout. Looks a lot like what is labelled as snow mold in some places although grey instead of white. I was wondering if there is any way I can treat this mix to be able to use it safely since it was a few pretty pennies (especially figuring shipping) on a nicely sized bag of mix or am I best off just biting the bullet and buying a new bag (and not letting it sit sealed for months)?

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  2. #2
    Diane's Avatar
    Diane is offline Can't Re-Member
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    I hate to throw stuff away, but I would shy away from using that. You don't want mold in your pots. Try getting a smaller quantity, or make your own. I always made my own.

  3. #3
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    I agree with Diane, wouldn't chance using it and then losing your orchids.
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    I agree. Toss it.
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    arwan is offline Senior Member
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    If it's very soft and breakdown on squeezing i would also toss it.
    But if still hard i would soak it in hot water for few minutes and rinse then soak them in fungicide solution for some hours and then rinse the solution and spread the media in direct sunlight until it is very dried up. And then store it in a dry place.
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    I would probably toss it, for fear of risking any plant potted in it, but we should be aware that not all fungi are bad, and in fact, can be beneficial.

    It is common, for example, to see white mold in Orchiata bark that was packaged wet, but that is a penicillium species that kills other pathogens. Trichoderma is also commonly found in Orchiata, and its metabolites break down the cell walls of other fungi, killing them.

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    dwllama is offline Junior Member
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    True enough, unfortunately I don't know any way to positively identify the fungus in there by means available at home. I suppose a few dollars is a lot cheaper than risking two years growth on a pair of orchids I bought as babies.

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    Agreed.

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