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Thread: shade cloth vs. tarp

  1. #1
    mass's Avatar
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    shade cloth vs. tarp

    Need to start thinking ahead about the upcoming summer heat.
    I have a brand new tarp here I can throw over the GH for a little extra shade. But a friend pointed out that that may actually cause the GH to heat up even more.

    The questions:

    Has anyone ever used a blue tarp as a shade provider, and did it work?
    How much does a 50% shade cloth actually help to cool a GH?
    If temps are 90*F-100*F outdoors, what's the best (non-electrical) way to keep a GH in the upper 70*s-mid 80*F's?

  2. #2
    East_to_west's Avatar
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    Having slept under many a tarp in the wilderness/music festivals, I think I can safely say that that would provide the opposite effect of what your trying to do mang. Any color like that thats darker in value will collect heat. I'm no expert on this subject but I believe that a shade cloth is your best bet for sure!
    Too weird to live, too rare to die.

  3. #3
    mass's Avatar
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    makes sense..
    Guess it's time to go shopping! Thanks brotha..

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    scottychaos's Avatar
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    Quote Originally Posted by mass View Post

    If temps are 90*F-100*F outdoors, what's the best (non-electrical) way to keep a GH in the upper 70*s-mid 80*F's?
    Maybe im wrong (I have never owned a greenhouse)
    but logic seems to dictate (to me) that it will *always* be warmer in a greenhouse, than outside.
    It seems like it would be impossible to make it cooler than outdoors, non-electrically..

    the best you can do is try to diminish the heat (with shade cloth)
    but I dont see how you can make it *cooler* than outdoors..

    a greenhouse, by its nature, will always trap heat.
    If its 20 degrees outside, it will be warmer in the greenhouse.
    if its 50 degrees outside, it will be warmer in the greenhouse.
    if its 100 degrees outside, it will be a LOT warmer in the greenhouse!

    you get the idea..
    shade cloth will make it "less warm"..but not cooler than outside..

    Scot

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    mass's Avatar
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    good point..
    please excuse me, my stupid is showing.

  6. #6
    does this rag smell like chloroform to you? boxofrain's Avatar
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    when I worked in nurseries in Texas, we used 70% shade cloths over the outdoor plants. They certainly kept the ground under them much cooler in the summer heat.
    The large greenhouses were using swamp coolers the size of a small school bus!
    "the memories of a man in his old age, are the deeds of a man in his prime"

  7. #7
    mass's Avatar
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    Shade cloths are surprisingly affordable on ebay. I figure a good shade cloth + multiple daily mistings with the cold hose water inside the GH should do the trick.

    LARRY!! I missed ya buddy.. I've got so much to tell you. I'll email ya!
    Last edited by mass; 04-28-2013 at 05:14 PM.

  8. #8
    Cardiac Nurse JB_OrchidGuy's Avatar
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    Suspend the shade cloth over the GH will help aid in cooling too.

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