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I need Den help.

This is a discussion on I need Den help. within the Dendrobium Information forums, part of the Frequently Asked Questions category; ...

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  1. #1
    fred7777 is offline Junior Member
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    Fred G. Hartmann Junior
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    Hi,

    I have a dendrobium Nobile and after it has finished flowering(flowers fell off) it has alot new growth , but some of the older green leaves have turned yellow slowly and fell off. Can anyone tell me what the problem is. Itís roots are a tannish white and the potting medium has small barks chips in the middle and slightly larger ones on top.

    I also have a Davallia fejeensis question. Itís outer part of the leaves have been slightly turning brown and yellow. Not all of them just some. any help is greatly appreciated.

    I use a humidifier with deminerlized water for half of the day every day.

    some pics if it helps.
    Attached Images Attached Images     

  2. #2
    espranch is offline Senior Member
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    Hi Fred, Those roots look very good to me! I used to have a den. nobile, and would re-pot it after it finished blooming. Could yours possibly need re-potting? If it's actively growing...now is the time. Maybe some more members who grow these will reply...Betty :-)
    Last edited by espranch; January 13th, 2011 at 10:06 AM. Reason: correct spelling

  3. #3
    fred7777 is offline Junior Member
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    Thank you for your help. I had it only for 3 months but it finished blooming and there is no roots coming out of the bottom, but would you still repot it?

  4. #4
    espranch is offline Senior Member
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    I probably would, if it were mine. AND, I'd use small fir bark,60% perlite, 20% charcoal 20%; a slightly larger pot with slits/holes and I would cut off any black roots with a sterile blade, before re-potting. I'd also put a few packing "peanuts" in the bottom to give it good drainage. I always soak my media overnight before re-potting...Just my opinion, hope this helps...Betty :-)

  5. #5
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    Kmac is offline Senior Member
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    Older canes will often lose their leaves. I think they can still bloom from those canes though. The roots look healthy, and they like being potbound, so I don't think I would repot it, unless the media is breaking down. If you do need repot, I agree with Betty's directions for how to do so.

  6. #6
    fred7777 is offline Junior Member
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    How do you tell if the medium is breaking down?

    What kind of charcoal, like form the pet store?

    If I canít find a slightly larger pot and only a more than slightly larger pot would you still repot, and if so how would you fill the excess space?

    Would you use a more than slightly larger pot to repot and how would you fill the excess space?

  7. #7
    espranch is offline Senior Member
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    No, it's made of hard wood chunks just for plants...the horticultural kind. Betty
    Last edited by espranch; January 13th, 2011 at 11:17 AM. Reason: add something

  8. #8
    fred7777 is offline Junior Member
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    Iím having a problem with the message system here. OK, hard wood charcoal chunks, right?

    How about a bag of orchid mix?

  9. #9
    espranch is offline Senior Member
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    That is good, Fred, if the fir chips are small enough...Betty

  10. #10
    fred7777 is offline Junior Member
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    Thank you Betty. Do you have a Davallia fern by chance?

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