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Short flower spikes

This is a discussion on Short flower spikes within the New Growers: Ask the Senior Members forums, part of the New Growers category; This is a problem that many of my orchids have in common. The flower spikes ...

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  1. #1
    MCSchrum is offline Member
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    Matt
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    Default Short flower spikes

    This is a problem that many of my orchids have in common. The flower spikes on my plants are pretty consistently shorter when they've rebloomed in my care than the flower spike on the plant when they were purchased. This is true for many of my phals, oncids, and other orchids that typically have a tall flower spike. I grow in an east-facing window with supplemental light (2 cfls and a 24 inch 4 bulb t5 fixture). I repot when necessary. My plants have a pretty healthy root systems. I typically keep the humidity between 50-60%, and I usually water every 2-3 in the summer to 5-7 days in the winter. In the winter the temp in my grow room gets down to the high 50s at night. Could temp be the cause of this?

  2. #2
    BigSteve's Avatar
    BigSteve is offline Senior Member
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    The most common cause of short flower spikes tends to be to much light.
    Have had this a few times with some paphs ,i now leave the higher light for the Roth's & Roth hybrids.
    You did not mention fertilizing regime but looking at the the rest of the information you have given
    i expect you have that sorted.
    Temps in your grow room should be fine , very similar to mine & i have had 1 or 2 huge spikes in there

  3. #3
    MCSchrum is offline Member
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    Steve, I do fertilize weakly weekly whenever my plants are growing or spiking. High light can cause this? I figured it would have been the opposite. Do growers often keep their plants in darker conditions when they're in spike?

  4. #4
    BigSteve's Avatar
    BigSteve is offline Senior Member
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    Higher light can change the colour saturation of blooms , i do move my paphs to lower light when the spike is starting to show.
    Nurseries tend to be able to adjust many aspects of the plants culture to ensure large spikes which as hobbyists will be difficult to achieve.
    A couple of paphs have actually flowered without the spike clearing the plant I.E. flowered virtually inside the plant , by moving the plants to
    a lower light level they did flower normally at a later date.

  5. #5
    catttan's Avatar
    catttan is offline Senior Member
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    Usually shorter spikes arethe result of too much light.

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