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  • #1

    Explanation Needed Please!

    Ok Koky.........As you know I am trying to grow a Potato Tower, which is in a blowaway inside a greenhouse. The blowaway has a fleece cover that apparently protects down to -8c...........at present, the temp is -1.5c inside the fleece cover.............am I right in thinking that you can have temps below freezing without any frost present..........if not, what does the -8C protection mean?
    Thanks in advance for any answers.
    Last edited by Bigmallly; 30-11-2016, 11:24 PM.
    sigpic“Gorillas are very intelligent, but they don't have to be as delicate as chimps -- they can just smash open the termite nest,”
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  • #2
    Ummmm interesting read at https://en.wikipedia.org/wiki/Frost I did not know there were so many different types ! I'm guessing that the frost cover to the blowaway or in my case my spacesaver makes it act like an igloo and keeps the inside warmer by just enough to prevent frost building on the plants.

    I'm sure some clever dicky will be along with a scientific explanation soon.
    Last edited by Cadalot; 01-12-2016, 07:29 AM.
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    • #3
      Doesn't it have something to do with the amount of moisture in the atmosphere?

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      • #4
        Originally posted by Greenleaves View Post
        Doesn't it have something to do with the amount of moisture in the atmosphere?
        That was my thinking, if there is no moisture in the air then it can't freeze. So does the fleece absorb the moisture or just not allow it in.
        sigpic“Gorillas are very intelligent, but they don't have to be as delicate as chimps -- they can just smash open the termite nest,”
        --------------------------------------------------------------------
        Official Member Of The Nutters Club - Rwanda Branch.
        -------------------------------------------------------------------
        Sent from my ZX Spectrum with no predictive text..........
        -----------------------------------------------------------
        KOYS - King Of Yellow Stickers..............

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        • #5
          I would have thought the fleece doesnt let the moisture in Bigmally.

          And when your back stops aching,
          And your hands begin to harden.
          You will find yourself a partner,
          In the glory of the garden.

          Rudyard Kipling.sigpic

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          • #6
            So basically, if there is no moisture present then the temp can go below freezing without harming your crops. I guess the cold does not kill them.
            sigpic“Gorillas are very intelligent, but they don't have to be as delicate as chimps -- they can just smash open the termite nest,”
            --------------------------------------------------------------------
            Official Member Of The Nutters Club - Rwanda Branch.
            -------------------------------------------------------------------
            Sent from my ZX Spectrum with no predictive text..........
            -----------------------------------------------------------
            KOYS - King Of Yellow Stickers..............

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            • #7
              Would depend on the water content of the plant is my guess, succulents can't survive frosts but then a brassica can

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              • #8
                I can't answer your question BM but I have lettuce growing in the greenhouse with an air fan moving the air above them -5c and still ok, potatoes lower down with no air movement, lost
                it may be a struggle to reach the top, but once your over the hill your problems start.

                Member of the Nutters Club but I think I am just there to make up the numbers

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                • #9
                  Originally posted by rary View Post
                  I can't answer your question BM but I have lettuce growing in the greenhouse with an air fan moving the air above them -5c and still ok, potatoes lower down with no air movement, lost
                  So that sounds like moving air can't crystallize.
                  sigpic“Gorillas are very intelligent, but they don't have to be as delicate as chimps -- they can just smash open the termite nest,”
                  --------------------------------------------------------------------
                  Official Member Of The Nutters Club - Rwanda Branch.
                  -------------------------------------------------------------------
                  Sent from my ZX Spectrum with no predictive text..........
                  -----------------------------------------------------------
                  KOYS - King Of Yellow Stickers..............

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                  • #10
                    Originally posted by Bigmallly View Post
                    So that sounds like moving air can't crystallize.
                    I'd proffer the suggestion that the stirred air moved the warm higher up and the cold fell (as it would anyway), the potatoes were underneath!

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