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.

Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 22

Winter is comming

This is a discussion on Winter is comming within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; Maggie, I totally agree. I've never used anything like that to insulate, but even with ...

Click here to increase the font size Click here to reduce the font size
  1. #11
    LJA's Avatar
    LJA
    LJA is offline OrchidTalk Tech Admin
    Real Name
    Louis J. Aszod
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    Cattleya
    Join Date
    Feb 2003
    Gender
    Male
    Location
    Clarksville, Arkansas
    Posts
    3,778
    Member's Country Flag

    Default

    Maggie, I totally agree. I've never used anything like that to insulate, but even with the double-walled poly on our GH, heating costs have been "through the roof" (bad pun intended) here in winter, and they're going to get worse.

    Matt, thanks for handling the link issue the way you did. I really appreciate that.

  2. #12
    Ennui's Avatar
    Ennui is offline lurker
    Join Date
    Feb 2005
    Location
    z5 NEO
    Posts
    141

    Default

    Quote Originally Posted by mde
    I read that just a single pane of glass can cut the outdoor footcandles in half. Just food for thought.
    Oh, that's one heck of a dirty window!
    A clean, single pane of plain glass will transmit 92% of the incoming light.
    And, as a measure of light intensity, a footcandle is
    the intensity of light received
    by 1 square foot of a surface
    that is 1 foot from a particular source of light.
    So, since intensity goes as 1/r^2,
    where r is the distance from surface to source,
    I would say
    the greater loss in light is due to distance from the lightsource/window,
    not the window itself.

  3. #13
    Gin's Avatar
    Gin
    Gin is offline Senior Member
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    All types
    Join Date
    Sep 2004
    Location
    Missouri
    Posts
    4,831
    Member's Country Flag

    Default

    I did buy the solar cover , it is tough plastic, right now it is attatched to long pieces of PVC and rolled together on the roof tomorrow we will try and unroll it . I also bought solid rubber mat squares they look like large puzzle pieces that lock together and put them on the cement floor that has no insulation under it , has always been miserable cold in the winter . The addition is done , and has the Vandas in it ,still have to organize them . Gin

  4. #14
    mde's Avatar
    mde
    mde is offline Senior Member
    Join Date
    Feb 2005
    Location
    Minneapolis
    Posts
    653

    Default

    Seeing this post back up on the active forum postings reminded me that I recently re-read the sources of what I said below, about light intensity being cut in half that Ennui argued against...

    This is From Alec Pridgeon's text, The Illustrated Encyclopedia of Orchids:

    "If you do not have a light meter, think of it this way: depending on your latitude, full sun on a summer day will likely produce between 10,000 and 12,000 footcandles. Once the light travels through glass its intensity drops by more than half."

    From William Cullina's book, Understanding Orchids, (which I provided a book review on under the literature section of this forum if you want to see more on this text), I read the following:

    "A clean pane [understood, single pane] of glass transmits about 85%-95% of the light trying to pass through it, and the percentage is lower if the glass is dirty or if you have storm windows, screens, or double or triple glazing."
    He goes on to state that "triple track" windows which have two sets of double pane glass (one is stationary and one is (re)-movable), when both are in place, will cut the intensity to 65%-70% if the glass is clean). This is the type of windows I have which is why for all months except the coldest when I'm prone to develop condensation, I remove the inner sets of windows and keep them in storage and is also why I keep the screen off the sliding glass door where my main bulk of orchids are kept. During these months I supplement the light with compact flourescents.

    For further comparison, from Ortho Books "All About Orchids" that is routinely recommended by AOS as one of the best 'all around' books on orchid growing, the following is reproduced:

    "The light intensity outdoors at noon on a clear summer day may be as high as 10,000 footcandles; a midday reading on an overcast winter day may be as low as 500 footcandles. As you would expect, the intensity of light indoors is much lower. The direct sunlight entering a window on a clear summer day may be as high as 8,000 footcandles next to the glass, but is usually closer to 4,000 to 5,000 footcandles."

    As stated, if you have dirty windows and/or screens on, it will be even less.

    I also agree with Ennui about the fact that the further back from the glass surface a plant is the light intensity will have dropped off rapidly.

    I'm certainly not an expert on this, but wanted to relay the sources of information that I have been going off of.

    Happy growing!

    Matt E.

  5. #15
    Gin's Avatar
    Gin
    Gin is offline Senior Member
    My Grow Area
    Greenhouse
    Favorite Orchid(s)
    All types
    Join Date
    Sep 2004
    Location
    Missouri
    Posts
    4,831
    Member's Country Flag

    Default

    I have a light meter and will check it tomorrow , that would be one grubby window lolol . I have checked the FC s. with the meter , the closer to the roof or walls the higher the readings . I wonder about some of the things I have found out growing the Vandas in the original part of the GH. which did not get a lot of sun due to the roof pitch (east/ west and being blocked by the house on the east and a big oak on the west , they bloom well hanging up about 8 foot from the top of the plant to the floor . The addition gets a lot more than the orginal part, the roof is sloped to the south . The big Catts.in clay pots went in there too .Have a big knot on my head ! lol that did it ! . Gin

  6. #16
    Forrest is offline Senior Member
    Join Date
    Jun 2004
    Posts
    404

    Default

    I know that this site does not condone a lot fo cross linking, but did you ask cactusfreak over at that "other site" permission to post that pic? I think it should work both ways.

  7. #17
    Diane's Avatar
    Diane is offline Can't Re-Member
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Catts and Paphs
    Join Date
    Jun 2005
    Location
    Surprise, AZ
    Posts
    6,250
    Member's Country Flag

    Default

    ???? What??? Where did the whole picture comment come from, Forrest??

  8. #18
    Forrest is offline Senior Member
    Join Date
    Jun 2004
    Posts
    404

    Default

    Quote Originally Posted by Diane
    ???? What??? Where did the whole picture comment come from, Forrest??

    I was just stating that the free flowing information should work both ways, and was wondering if permission was recieved to post the pic.

  9. #19
    Diane's Avatar
    Diane is offline Can't Re-Member
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Catts and Paphs
    Join Date
    Jun 2005
    Location
    Surprise, AZ
    Posts
    6,250
    Member's Country Flag

    Default

    Erh, okay - whatever...

  10. #20
    mde's Avatar
    mde
    mde is offline Senior Member
    Join Date
    Feb 2005
    Location
    Minneapolis
    Posts
    653

    Default

    What are you talking about? What picture? And who are you asking this too? Very confused...
    ME

Page 2 of 3 FirstFirst 123 LastLast

Similar Threads

  1. Winter Color
    By Bikerdoc5968 in forum Orchids of Other Genera IN BLOOM
    Replies: 14
    Last Post: April 25th, 2010, 09:14 PM
  2. Winter rest or not?
    By ang709 in forum Orchid Ailments / The Compost Pile
    Replies: 2
    Last Post: January 1st, 2007, 05:20 PM
  3. winter
    By Sarah in forum A Kodak Moment: not necessarily plants...
    Replies: 5
    Last Post: December 12th, 2006, 11:09 AM

Tags for this Thread

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.