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What causes this?

This is a discussion on What causes this? within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; At the end of June I bought a Den. It was in a big block ...

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  1. #1
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    Angry What causes this?

    At the end of June I bought a Den. It was in a big block of coconut husk; I removed it and put it in bark. It shed some older leaves which did not worry me. However on 2 of this year's growths, the top leaf or two died, and when I removed them, the other end was brown/black sticky/wet. I put peroxide into the resulting cavity, and, after drying COMPLETELY, added cinnamon. So far I noticed no further problem with those 2 growths, but today I noticed that 2 more of this year's growths are doing the same thing.
    What might be causing this? I do not water from above; I add the water right above the medium. Also the rest of the plant appears healthy. I poked around at the bark, and the roots I see look healthy and white. Also two brand new growths are shooting up...Any ideas as to what went wrong?

  2. #2
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    Usually this is caused when water gets lodged in the new growth at the apex. But, since you don't water from above....hmm..

    Is it outside? Does it get rained on?

    It could be from lack of good air circulation.

  3. #3
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    I was going to say air circulation also. I think Clint is right on the money.

    Cheers,
    BD

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    The plant is inside my apartment, so it hasn't been rained on. As to air circulation, I had actually bought a fan to help in that regard, but for some reason that's beyond me, I've never used it. I guess it's time to get it out of the box...

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    Yep it is time, aim it to stir the air and to gently move the leaves not aimed directly on the plant . that should help . Gin

  6. #6
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    Thanks everyone for the tips. I did get the fan out that night and have been using it since. We'll see how it goes.

  7. #7
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    Had something similar happen.. but i KNOW the cause. This den. had a very coarse substrate and it was very difficult to keep moist.. so I soaked it... and got a phone call... and forgot it soaking up to the top of the pot in water for at least 24 hours. Ooops. Tops of both new growths and a spike died.. turned BLACK, from lack of oxygen, I'd guess. So perhaps its too wet?

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