Shop Orchid Care OrchidTalk Orchid Forum Weather Station Links Nursery

Welcome to OrchidTalk Orchid Forums


The Friendliest Orchid Community on the Internet!


  •  » Learn to Repot your Orchids
  •  » Learn Orchid Care Tips and Secrets
  •  » Find the perfect Orchid for your Growing Environment
  •  » Chat with Orchid Growing Professionals

OrchidTalk - "Bringing People Together to Grow Orchids Better!"


Let us help you grow your Orchids better; Join our community today.


YES! I want to register an account for free right now!


Register or Login now to remove this advertisement.

Results 1 to 8 of 8
Like Tree1Likes
  • 1 Post By 78Terp

Indoor daily temperature swings

This is a discussion on Indoor daily temperature swings within the General Orchid Culture forums, part of the Orchid Culture category; I've read that many orchids need a day-night temperature difference of 10-15F in order to ...

Click here to increase the font size Click here to reduce the font size
  1. #1
    MCSchrum is offline Member
    Real Name
    Matt
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Latouria Dendrobiums
    Join Date
    Oct 2013
    Gender
    Male
    Location
    Missouri, USA
    Posts
    64
    Member's Country Flag

    Default Indoor daily temperature swings

    I've read that many orchids need a day-night temperature difference of 10-15F in order to grow and flower properly. I have a thermometer that records daily high and low temps in my orchid room. During the summer, with the air conditioner going, I generally get nightly lows of 72F (which is the temperature set on the thermostat), and the sun coming in the window during the day raises the temp to around 80F. I grow all my plants near an east-facing window and under lights. All of my plants are in the same room on the second story of my apartment. Since I'm currently only getting about an 8 degree F difference in temperature every 24 hours, is there a way to increase this temp range, short of changing the setting on the thermostat daily? My fiance probably wouldn't approve of sweltering days and frigid nights throughout the apartment.

  2. #2
    chemist's Avatar
    chemist is offline Senior Member
    Real Name
    Svetlana
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Phals, catts, catasetums
    Join Date
    Jul 2014
    Gender
    Female
    Location
    Long Island, NY
    Posts
    463
    Member's Country Flag

    Default

    I think you sould be ok
    8 is close to 10.
    Also remember that when sun shines closer to the window temp will be higher than farther from it so your plant probably getting 10-15 degree difference between day and night.
    Meanwhile keep windows open in fall to get lower temp at night and you should be able to make them flower.

  3. #3
    MCSchrum is offline Member
    Real Name
    Matt
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Latouria Dendrobiums
    Join Date
    Oct 2013
    Gender
    Male
    Location
    Missouri, USA
    Posts
    64
    Member's Country Flag

    Default

    That's a good point chemist. I have the thermometer in the shade, underneath the leaves, and farther from the window because I wanted to attempt to measure the ambient temperature of the room. So the plants closer to the window are probably getting a higher temperature during the day, and thus a wider diurnal range of temps.

    I also try to keep the windows open in the house during spring and fall, because it gives my orchids the temperature range they need, and it keeps my electric and gas bills low!

    I considered shutting the AC vent off in the orchid room to raise the temps during the day, but it seems like that raises nighttime temps as well.

  4. #4
    raybark's Avatar
    raybark is offline Senior Member
    Real Name
    Ray Barkalow
    My Grow Area
    Under Lights
    Join Date
    Oct 2012
    Location
    Oak Island NC
    Posts
    1,274

    Default

    Most plants do well with a diurnal change. However, that is not to be confused with phalaenopsis, which need about two weeks of a 10- to 15-degree drop in AVERAGE growing temperature in order to reliably initiate flower spikes.

  5. #5
    MCSchrum is offline Member
    Real Name
    Matt
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Latouria Dendrobiums
    Join Date
    Oct 2013
    Gender
    Male
    Location
    Missouri, USA
    Posts
    64
    Member's Country Flag

    Default

    Ray, I've got a few Phal hybrids, and I've been able to successfully bloom them every fall. I keep the windows open during most of September and October, and this gives me the temperature change drop they need.

    I've read that most orchids benefit from a temperature drop every night, because it allows their metabolism to slow, and this somehow contributes to their overall health. This is the reason I asked about a summer time diurnal temperature swing.

  6. #6
    78Terp's Avatar
    78Terp is offline An Avant Gardner
    Real Name
    Harvey
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    1-Neo falcata,2-Phal,3-Paph
    Join Date
    Nov 2013
    Gender
    Male
    Location
    Littleton, Colorado
    Posts
    6,036
    Member's Country Flag

    Default

    There was an article in November 2014 'Orchids Magazine' (the monthly AOS publication) that talked all about the benefit orchids get by the lower overnight temperature. The short of it is that when the temp is lowered at night 15-20 degrees F, it allows the orchid to store energy that will be used later for blooming. Not lowering the temp prevents that energy storage and can prevent an orchid from blooming or blooming well.

  7. #7
    MCSchrum is offline Member
    Real Name
    Matt
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Latouria Dendrobiums
    Join Date
    Oct 2013
    Gender
    Male
    Location
    Missouri, USA
    Posts
    64
    Member's Country Flag

    Default

    Terp, thanks for clearing that up. I knew there was some sort of physiological benefit to a temperature drop, but I wasn't sure what the mechanism was. I'm not quite able to get that 15-20 degree swing. Maybe I'll try closing the vents in the morning, and opening them at night. Perhaps that will give me the warm days and cool night my plants crave. If it leads to more and/or bigger blooms, then I think it's worth the trouble.

  8. #8
    78Terp's Avatar
    78Terp is offline An Avant Gardner
    Real Name
    Harvey
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    1-Neo falcata,2-Phal,3-Paph
    Join Date
    Nov 2013
    Gender
    Male
    Location
    Littleton, Colorado
    Posts
    6,036
    Member's Country Flag

    Default

    I live alone so I can do it for my orchids without complaint from anyone else.

Similar Threads

  1. Indoor garden
    By Tiberius Su in forum OrchidTalk Members Grow Area - Photos
    Replies: 8
    Last Post: September 7th, 2013, 03:41 PM
  2. New Indoor Set Up Under Lights
    By rich63 in forum Semi Hydro / Lights / Greenhouses / Accessories
    Replies: 11
    Last Post: March 26th, 2011, 12:41 AM
  3. Daily Horoscope on the RVO Orchid Forum
    By Brutal_Dreamer in forum Using the Boards
    Replies: 2
    Last Post: October 8th, 2007, 12:19 PM
  4. Why I have indoor orchids
    By OrchidTraci in forum Orchid Ailments / The Compost Pile
    Replies: 19
    Last Post: July 22nd, 2004, 08:01 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
OrchidTalk --An Orchid Growers Discussion Forum brought to you by River Valley Orchidworks. A World Community where orchid beginners and experts talk about orchids and share tips on their care, cultivation, and propagation.