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  • 1 Post By eeyore
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  • 3 Post By arwan

Shrivelled pseudobulbs

This is a discussion on Shrivelled pseudobulbs within the New Growers: Ask the Senior Members forums, part of the New Growers category; I am curious to know if shrivelled pseudobulbs means that the plant is not getting ...

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  1. #1
    eeyore is offline Senior Member
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    Default Shrivelled pseudobulbs

    I am curious to know if shrivelled pseudobulbs means that the plant is not getting enough water? I've noticed though that some orchids have shrivelled pbs and still seem to thrive. Also, the maxi tenuiflora pbs seem to shrivel when the flowers have been out for a while - does that mean they need more water? I am already keeping the sphagnum moss quite damp and the humidity is very high... the older pbs on bulbophyllums seem to natural shrivel too?

    Perhaps it's not possible to generalise but would appreciate any insights the experienced growers have...

  2. #2
    78Terp's Avatar
    78Terp is offline An Avant Gardner
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    I think it depends on the type of orchid. I have a oncidium type that has smooth pb's when they are new but become textured (I wouldn't call them shriveled) after they mature. So it is difficult to generalize as you said.

  3. #3
    eeyore is offline Senior Member
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    Let me try and give more specific examples...

    Here is the tenuifolia which a week ago had nice full p-bulbs...

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    Here is an oncidium which was given to me recently - p-bulbs look very shrivelled/textured but new shoots are developing... the potting media looks terrible to me - probably needs a repot?

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    Here is a potinara which I recently repotted from sphagnum moss mount - again, new shoots growing well but older p-bulbs look shrivelled rather than textured to me!

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  4. #4
    eeyore is offline Senior Member
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    A few bulbophyllums (I think?) which look shrunken...

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    And an Alicera whose p-bulbs are turning purple and textured?

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    ---------- Post Merged at 10:39 AM ----------

    Would also like to ask if it's a problem that the sphagnum moss turns green and grows more moss? We have very hot, humid conditions as my plants are on the balcony...

  5. #5
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    coeruleo is offline Night Bloomer
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    if it is very humid, you may be over-watering. allow most of these plants to dry out a bit before watering again. the bulbs can shrivel if the roots rot from too much water. moss is difficult. you need to learn to let it dry out.

  6. #6
    ksriramkumar is offline Senior Member
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    Actually I find the pseudo bulbs to be in good health. the root tips are also green which is good. watch out for over watering though

  7. #7
    arwan is offline Senior Member
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    I agree with Sriram Kumar, your plants look healthy. Sometimes when they give new growth or starts giving a new flower spike the pbulbs shrink/ shriveled a bit since energy is taken from the pbs to grow new pbs or flower spike.
    But If the weather is very humid avoid over watering and maybe check the roots to see if they are in good health and maybe spray a bit of fungicide as a preventive measure for possible fungus infection.
    Posted via Mobile Device

  8. #8
    eeyore is offline Senior Member
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    Thanks everyone, seems like the general conclusion then is that what I think is shrivelled is actually "textured" and normal? Anyway, we now have some sunny weather so hopefully the potting/mounting media can now dry out a bit!

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