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Den. Yellowing Blooms?

This is a discussion on Den. Yellowing Blooms? within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I have a Den. noid that is a pure white bloom when it was purchased.It ...

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  1. #1
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    Default Den. Yellowing Blooms?

    I have a Den. noid that is a pure white bloom when it was purchased.It currently has three spikes.For some reason the larger buds are turn yellow and dying ? I have already removed three buds that had turned yellow.As you can see from the photos it is still happening.What could be the issue causing this ? Thank you for any help. Take Care,Rich
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    Ron-NY is offline rothaholic
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    any change in humidity or temps?

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    wetfeet101b is offline It's not dead! It's just permanently dormant.
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    It looks like common bud blast associated with relocating orchids that are in bud and the origin and destination have significantly different conditions (specially humidity and temperature).

    I sometimes get dendrobiums to blast if I move them from the greenhouse to the living room too early because of the drop in humidity. I have to wait until the buds are almost ready to pop open before I can move them.

    This is a reflex mechanism for orchids. In nature, orchids don't move around as much as their hobby counterparts.
    A drastic change in temperature or humidity that is uncharacteristic of its local climate is probably perceived by the plant that "it moved out of its comfort zone". Either the plant was detached from the tree, or the tree itself fell, etc.
    Either way the plant goes into conservation mode and the flowers will be the first to go since they consume the most energy.
    The plant is forced to divert energy to making sure that it can establish itself again in the new locale - whether it is the forest floor, or someone's living room.

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    Quote Originally Posted by wetfeet101b View Post
    It looks like common bud blast associated with relocating orchids that are in bud and the origin and destination have significantly different conditions (specially humidity and temperature).

    I sometimes get dendrobiums to blast if I move them from the greenhouse to the living room too early because of the drop in humidity. I have to wait until the buds are almost ready to pop open before I can move them.

    This is a reflex mechanism for orchids. In nature, orchids don't move around as much as their hobby counterparts.
    A drastic change in temperature or humidity that is uncharacteristic of its local climate is probably perceived by the plant that "it moved out of its comfort zone". Either the plant was detached from the tree, or the tree itself fell, etc.
    Either way the plant goes into conservation mode and the flowers will be the first to go since they consume the most energy.
    The plant is forced to divert energy to making sure that it can establish itself again in the new locale - whether it is the forest floor, or someone's living room.
    That's really good to know. I was almost ready to move mine from the bedroom out to the patio/Florida room, but it's much warmer (and more humid) out there. I guess I'll just keep my two little babies here in the bedroom for awhile.

    Thanks for the education!!

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    Dens are DRAMA QUEENS!
    Cin

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    Quote Originally Posted by wetfeet101b View Post
    Either way the plant goes into conservation mode and the flowers will be the first to go since they consume the most energy.
    The plant is forced to divert energy to making sure that it can establish itself again in the new locale - whether it is the forest floor, or someone's living room.
    Very interesting explanation, John.
    I had a phal in bud that I recently moved to a sunnier, less humid location.
    The bud blasted and the Phal went on to start growing a leaf and two roots ... It decided to initiate a new growth cycle!
    I think Phals can be Drama Queens too ... (especially under my care!)

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    Thanks Ron & John.I did move the plant a few weeks ago from outside to inside under lights,just as the first sign of a spike was seen.The spike was less than 1/2" long.At that time I only noticed one spike,now there is a total of three spikes.Could that have caused the buds to blast? The spike didn't have any bud formation at that time.The other two spikes seem to be OK. Thank You For Your Time,Rich

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