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Phalaenopsis growing temperature

This is a discussion on Phalaenopsis growing temperature within the Genus Specific forums, part of the Orchid Culture category; I agree with Ray on the temperature change. It is the average temperature change that ...

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  1. #11
    Catt Mandu's Avatar
    Catt Mandu is offline Senior Member
    My Grow Area
    Favorite Orchid(s)
    Cattleyas, Phalaenopsis
    Join Date
    Jun 2012


    I agree with Ray on the temperature change. It is the average temperature change that seems to induce flowering. I should say that it seems to induce spikes more often with the complex hybrids I grow (I don't have any species at the moment). My Phals bloom the most in the fall-winter. But, I have two that started spikes in late spring when average temperatures were climbing, and a re-bloom on an old spike that also started in June.

    To answer Wade's original question, my temperatures vary seasonally, as do my growing conditions. From April to October (weather permitting) I grow all my orchids including Phals outdoors. I have heard that you should never expose Phals to temperatures below about 50 F but I do it all the time and never see a problem, as long as the temperature stays above 40 F (I am not recommending it, but I have allowed temperatures to dip to 38F outside and saw no evidence of mesophyll collapse). Maybe the cooler temperatures at night in April induces the spikes I see in June? In late summer to October, the cool-down is more gradual, and I also leave all of my plants outdoors until we hit about 40F at night. During mid summer, my high temperatures often go into the low and mid nineties, and my plants have tolerated 108 F with no problems. Early morning lows are mostly in the 70s F, but can vary from mid 60s to 80 F.

    October to April, plants are grown indoors under fluorescent lighting. Temperatures are more constant, with temperatures in the upper 60s at night and in the low 70s during the day.

  2. #12
    Wade's Orchids's Avatar
    Wade's Orchids is offline Senior Member
    Real Name
    Wade Hollenbach
    My Grow Area
    Favorite Orchid(s)
    Anything in bloom :)
    Join Date
    Jan 2014
    Central Pennsylvannia
    Member's Country Flag


    Well, since March it's looking like the greenhouse temp might be lower - more like 55F. Almost everything will be happy except for the Vandaceous family and the warmer paphs. I wish I could curb my desire but I like almost all orchids. I may be able to achieve a warm spot by playing with the heating vents. Really, just wish they'd get to work on the greenhouse. This was supposed to have been started 3 months ago and it's been delay after delay. I do have to say that my collection is looking very good under the house eves. They are getting very bright shade except for sun about an hour before sundown. My small Phal. collection is inside and I guess will remain there unless I can find a warm corner of the gh.

  3. #13
    Wendell Clump is offline Junior Member
    Join Date
    Sep 2014


    I'm amazed at the resilience of these plants, my very first orchid was a Doritaenopsis 'Sogo Cherry'. My temperatures got down to 5 degrees and I overwatered it, the crown rotted, despite that it kept flowering constantly, it has recently started regenerating and a new leaf has appeared. I'm thrilled I didn't want to throw it away. Now I'm more experienced I take better care of it.
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