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  • #1

    Greenhouse/Polytunnel Humidity

    I have a weather station from Lidl or Aldi with sender units in both the greenhouse and polytunnel. It shows a humidity reading for both sitting around 68-72% . What is the optimum figure for growing undercover - does anyone know?
    Thanks in advance.
    Look deep into nature, and then you will understand everything better...Albert Einstein

    Blog - @Twotheridge: For The Record - Sowing and Growing with a Virgin Veg Grower: Spring Has Now Sprung...Boing! http://vvgsowingandgrowing2012.blogs....html?spref=tw
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  • #2
    No idea, I have always understood that the atmosphere shoud be 'bouyant' Not too hot, not too cold, not too wet and not too dry. In fact good growing conditions.

    Not a lot of help, sorry.
    Gardening requires a lot of water - most of it in the form of perspiration. Lou Erickson, critic and poet

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    • #3
      Last night fell to 6° and by morning had reached 32° - buoyant it is not. Hmmmm
      Look deep into nature, and then you will understand everything better...Albert Einstein

      Blog - @Twotheridge: For The Record - Sowing and Growing with a Virgin Veg Grower: Spring Has Now Sprung...Boing! http://vvgsowingandgrowing2012.blogs....html?spref=tw

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      • #4
        Ventilation is very important when growing under cover.

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        • #5
          Originally posted by VirginVegGrower View Post
          Last night fell to 6° and by morning had reached 32° - buoyant it is not. Hmmmm
          Ventilate and damp down. Have you got any means of shading?
          Last edited by roitelet; 08-06-2013, 01:26 PM.
          Gardening requires a lot of water - most of it in the form of perspiration. Lou Erickson, critic and poet

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          • #6
            Originally posted by rustylady View Post
            Ventilation is very important when growing under cover.
            I have auto vents on the greenhouse and the door gets unlocked every morning. Polytunnel has enviromesh sides with roll up/roll down flaps and meshed doors. I am currently rolling up flaps and opening the door in a morning. I damp down daily in hot weather.
            It was more a question about the optimum humidity. Geeky I know.
            Look deep into nature, and then you will understand everything better...Albert Einstein

            Blog - @Twotheridge: For The Record - Sowing and Growing with a Virgin Veg Grower: Spring Has Now Sprung...Boing! http://vvgsowingandgrowing2012.blogs....html?spref=tw

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            • #7
              Originally posted by roitelet View Post
              Ventilate and damp down. Have you got any means of shading?
              Both done each day on hot days. I was interested in optimum humidity figure.
              I guess there isn't one.
              Look deep into nature, and then you will understand everything better...Albert Einstein

              Blog - @Twotheridge: For The Record - Sowing and Growing with a Virgin Veg Grower: Spring Has Now Sprung...Boing! http://vvgsowingandgrowing2012.blogs....html?spref=tw

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              • #8
                Greenhouse Humidity

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                • #9
                  Originally posted by rustylady View Post
                  Greenhouse Humidity
                  You RL are a genius - thank you! I googled and couldn't find a figure, but it seems 75% is optimum and I'm a tad away from that. Going to mist and see if that helps get it up a little I'm not far off.
                  Much thanks again x
                  Look deep into nature, and then you will understand everything better...Albert Einstein

                  Blog - @Twotheridge: For The Record - Sowing and Growing with a Virgin Veg Grower: Spring Has Now Sprung...Boing! http://vvgsowingandgrowing2012.blogs....html?spref=tw

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                  • #10
                    Good question and answers.

                    I know very little about this except that different plants like different humidity. Cumbers for instance like it far more humid than toms.

                    Potty
                    Potty by name Potty by nature.

                    By appointment of VeggieChicken Member of the Nutters club.


                    We hang petty thieves and appoint great ones to public office.

                    Aesop 620BC-560BC

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                    • #11
                      i just leave the door open from the end of may and close it in october unless a bad storm is forecast..

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                      • #12
                        Just be careful you don't make it too humid. You could encourage blight spores to germinate, or moulds to start. Should be ok with a healthy airflow.

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