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Trouble with Vanda Zengyo white spike

This is a discussion on Trouble with Vanda Zengyo white spike within the New Growers: Ask the Senior Members forums, part of the New Growers category; Hi, I have a V. Zengyo white, which I got it as a near blooming ...

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  1. #1
    blrnut is offline Senior Member
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    Question Trouble with Vanda Zengyo white spike

    Hi,

    I have a V. Zengyo white, which I got it as a near blooming size orchid, which never bloomed before. It put up some healthy roots and the plant by itself looks pretty healthy. It has tried to put on spikes since then at my home. I see the spike between the leaves, and it stays that way (grows about a cm long, just good enough for me to see it). It does not grow beyond that and finally the spike turns brown after a few weeks due to any water that might have stagnated. This is the 3rd spike and I do not see any spike on it. My ASCDA Meda Sand x Bonanza (which also was a first time bloom, as it previously did not bloom at the nursery before) spiked long after this one and is blooming, but this one does not. I fertilize it weekly with NPK. Please advise as to what I can do to make it spike.

    -Satish

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    delphiguy's Avatar
    delphiguy is offline Senior Member
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    where do you grow it? (im assuming outdoors) it could be that your humidity may have fluctuated or dropped low enough for
    the spike to abort? or maybe something is chewing on the spike? I had that
    happened to one of my vandas before, I noticed that the spike is about to emerge about
    1cm when something got to it and chewed it up. Also if your growing outside in full sun, it could
    be that some water stayed in between the leaves and when the sun got it, it may have
    burned the emerging spike, happened to me too, but the spike continued to develop and bloom.
    I doubt that stagnant water stored in between the leaves could have done it, I water my vandas
    at least 2x daily, and often the last one is done late in the afternoon at aroung 5-6ish... but im
    growing outdoors so there is constant air movement.

    Of course dont take my word for it, im sure someone more experienced can give you better advice.

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    blrnut is offline Senior Member
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    Quote Originally Posted by delphiguy View Post
    where do you grow it? (im assuming outdoors) it could be that your humidity may have fluctuated or dropped low enough for
    the spike to abort? or maybe something is chewing on the spike? I had that
    happened to one of my vandas before, I noticed that the spike is about to emerge about
    1cm when something got to it and chewed it up. Also if your growing outside in full sun, it could
    be that some water stayed in between the leaves and when the sun got it, it may have
    burned the emerging spike, happened to me too, but the spike continued to develop and bloom.

    I doubt that stagnant water stored in between the leaves could have done it, I water my vandas
    at least 2x daily, and often the last one is done late in the afternoon at aroung 5-6ish... but im
    growing outdoors so there is constant air movement.

    Of course dont take my word for it, im sure someone more experienced can give you better advice.
    I grow it outdoors (North) where it gets the morning sun until 10:00AM and gets quite a bit of air. There is nothing that comes and chews on to it. the problem is the spike stays the same upto few weeks and does not do anything and finally just turns brown

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    I agree with Randy. But if the culprit is an insect and there are no chew marks,just a drying of the emerging spike , then I suspect the culprit is a minute thrip. It has happened to a few of my vandas esp the semi-teretes and I have been able to control this with an insecticide spray.

  5. #5
    blrnut is offline Senior Member
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    But I do not understand why the spike is not growing for over 6 weeks. It has still not turned brown this time, but it is still not growing and just see the spike.

  6. #6
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    Satish, could you post a photo of the spike. Sometimes it take a very long time for a spike to develop. I am going to guess the problem is humidity if the plant is getting enough light, then it must not be getting enough humidity to maintain the spike. Being outside, it seems that it would get the required humidity. Puzzling.

    Cheers,
    BD

  7. #7
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    this is really puzzling. it seems you have the right condition for it to bloom.
    you said that you have been fertilizing it, could it be that the ferts stayed too long on the
    developing spike enough to burn it?

  8. #8
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    You may be right, Randy. Some plants are sensitive to fert when in bud.

  9. #9
    blrnut is offline Senior Member
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    I finally got around to taking some pictures of the plant. The first 2 are the pictures of Vanda Zengyo White with the spike problem. The spike shown here is more than 4 months now

    The last picture is of another Vanda (V. Roberts Delight 'Black') that I'm having trouble with. Recently, I noticed that this vanda has these black spots on its leaves.

    Let me know what could be wrong with these two guys.

    Satish
    Attached Images Attached Images    

  10. #10
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    satish
    from the looks of it the spike looks ok to me... I have a few Vandas that just takes time
    to develop the spikes, as for the roberts delight, its looks like sun burn to me.... I have
    made a mistake a few months ago and exposed my v.robert delight and v.sanderiana in
    way too much sun than they could handle, my robert delight was badly burned but was
    able to save it, while my sanderiana got infected with fungus and i lost it.

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