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Grrrrr...Dendrobium light.

This is a discussion on Grrrrr...Dendrobium light. within the General Orchid Culture forums, part of the Orchid Culture category; So I'm totally frustrated with a dend I bought a few weeks ago. I want ...

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  1. #1
    sand_tiger86's Avatar
    sand_tiger86 is offline Senior Member
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    Default Grrrrr...Dendrobium light.

    So I'm totally frustrated with a dend I bought a few weeks ago. I want to put it outside so badly so it can get a little growing in these last few warm weeks but it burned pretty badly the first two hours I put it out with my other orchids! Funny thing is, my other dendrobium has always been happy as a clam outside in the bright light. Neither are nobile type dends, but their leaves are different. The one that doesn't like such high light has round, thick darker green leaves, and the one that likes it has more narrow, pointed, and thinner leaves that are a light green. The one that burns just doesn't seem to want to put forth any new growth in my room...any ideas?

  2. #2
    ang709's Avatar
    ang709 is offline Loves 'chids
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    You mention that the one that burnt has dark green leaves. That makes me think it's been kept in low light (maybe before you got it, since you haven't had it long?). If so, it's better to increase light gradually to minimize risk of burning. Also, is it sitting outside in direct sun, or is there some shade?

  3. #3
    hcubed's Avatar
    hcubed is offline Senior Member
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    How about fertilizing? If you haven't done that, it has triggered new growths on a lot of mine, so you might try that too.

  4. #4
    wetfeet101b's Avatar
    wetfeet101b is offline It's not dead! It's just permanently dormant.
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    If that dendrobium was grown under lights, then it would get burned when suddenly placed outdoors with a lot of sun.
    It will need to be acclimated slowly to get the plant to build up the necessary cells for sun protection.

    Some nurseries grow their orchids under lights. These lights, even at their brightest capacity are not as intense as natural sunlight and they make up for it by extending the photoperiod in order to achieve the required minimum daily photosynthesis in order to bloom.

    In theory, a plant that requires 3000fc for 8 hours can be grown under lights that only provide 1500fc if the lights are on for 16 hours.
    The net effects will be:
    3000fc x 8 hours = 24000fc-hours/day
    1500fc x 16 hours = 24000fc-hours/day

    The difference though is that the plant grown under lights will have a much lower tolerance to natural sunlight.

  5. #5
    sand_tiger86's Avatar
    sand_tiger86 is offline Senior Member
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    I really couldn't say what its conditions were prior to it's home with me, but it's frustrating because there's really no way I can gradually introduce it to more light. The porch I put it on is western and get's direct light from about 4:30-8 p.m. no direct light for the rest of the day...it was moved from an eastern window that got direct sun from about 8-11 a.m. The east window is in my room, the only place where it's safe lol If i put it in another window of the house my cat will knock it over So it's either my eastern window that seems to not give enough light, or scorch the poor thing outside.

  6. #6
    wetfeet101b's Avatar
    wetfeet101b is offline It's not dead! It's just permanently dormant.
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    You can give it temporary sun protection by placing a shear fabric ( or several layers) between the plant and the sunlight.
    You can use any method imaginable to prop up the fabric. With this method, you can gradually increase the sun exposure without actually relocating the plant.

  7. #7
    Shaydra is offline Senior Member
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    Maybe use a thin white dress shirt? Seems like almost every guy I know has one of these lying around someplace....

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