How hot does a greenhouse get???

Discussion in 'Greenhouse Growing' started by Spacemunkey, Mar 2, 2017.

  1. Spacemunkey

    Spacemunkey Gardener

    Joined:
    Feb 4, 2017
    Messages:
    146
    Gender:
    Male
    Occupation:
    Steel worker
    Location:
    Port Talbot
    Ratings:
    +270
    Hi everyone, I'm now realising the importance of vents in a greenhouse, it's been a nice sunny day here in South Wales today. Late this afternoon I went inside Doris and looked at the thermometer I've placed in there and it was reading 35c/100f. I was amazed how hot it was in there, I know the roof vents, louvre and doors were closed but flipping heck!! How warm could it get inside on a hot July day with everything closed??
     
    • Like Like x 1
    • ARMANDII

      ARMANDII Low Flying Administrator Staff Member

      Joined:
      Jan 12, 2019
      Messages:
      48,096
      Gender:
      Male
      Ratings:
      +100,834
      It all depends on the intensity of the Sun, SM, but well, in excess of 150f.:hate-shocked:
       
      • Like Like x 1
      • Informative Informative x 1
      • Sheal

        Sheal Total Gardener

        Joined:
        Feb 2, 2011
        Messages:
        35,546
        Gender:
        Female
        Location:
        Beauly, Inverness-shire. Zone 9a
        Ratings:
        +52,311
        If the sun shines Spacemunkey it's going to warm up in there whatever the time of year. During the summer you may need some shading for it as well as windows and doors being left open all day.
         
        • Like Like x 1
        • Agree Agree x 1
        • Informative Informative x 1
        • Spacemunkey

          Spacemunkey Gardener

          Joined:
          Feb 4, 2017
          Messages:
          146
          Gender:
          Male
          Occupation:
          Steel worker
          Location:
          Port Talbot
          Ratings:
          +270
          Wow!!!! That's proper hot, even factor 50 sunscreen wouldn't protect tomatoes from that heat lol. But seriously I can see why ventilation is so important inside s greenhouse
           
          • Like Like x 2
          • Agree Agree x 1
          • ARMANDII

            ARMANDII Low Flying Administrator Staff Member

            Joined:
            Jan 12, 2019
            Messages:
            48,096
            Gender:
            Male
            Ratings:
            +100,834
            Even a 100f is hot enough to kill some plants, SM:hate-shocked:
             
            • Like Like x 1
            • Friendly Friendly x 1
            • Spacemunkey

              Spacemunkey Gardener

              Joined:
              Feb 4, 2017
              Messages:
              146
              Gender:
              Male
              Occupation:
              Steel worker
              Location:
              Port Talbot
              Ratings:
              +270
              What type of shading do you guys recommend if it gets to hot?
               
              • Like Like x 2
              • Linz

                Linz Total Gardener

                Joined:
                Oct 7, 2015
                Messages:
                2,511
                Gender:
                Female
                Occupation:
                Prosperous Peasant
                Location:
                S.Wales
                Ratings:
                +6,224
                I can't answer as I haven't got a green house BUT it was lovely today :dbgrtmb:
                 
                • Like Like x 3
                • Spacemunkey

                  Spacemunkey Gardener

                  Joined:
                  Feb 4, 2017
                  Messages:
                  146
                  Gender:
                  Male
                  Occupation:
                  Steel worker
                  Location:
                  Port Talbot
                  Ratings:
                  +270
                  It was a fabulous day today :hotsun:
                   
                  • Like Like x 3
                  • Agree Agree x 1
                  • ARMANDII

                    ARMANDII Low Flying Administrator Staff Member

                    Joined:
                    Jan 12, 2019
                    Messages:
                    48,096
                    Gender:
                    Male
                    Ratings:
                    +100,834
                    I live in West Cheshire and, so far, have found having the automatic vents, louvres, and leaving the door open to be sufficient.:snorky:
                     
                    • Like Like x 4
                    • Agree Agree x 1
                    • Sheal

                      Sheal Total Gardener

                      Joined:
                      Feb 2, 2011
                      Messages:
                      35,546
                      Gender:
                      Female
                      Location:
                      Beauly, Inverness-shire. Zone 9a
                      Ratings:
                      +52,311
                      Hmmm, there you've got me. :) Where I used to live (the Isle of Man) it was never hot enough to need shading. I've only been here in Scotland since last September.
                       
                      • Friendly Friendly x 2
                      • Like Like x 1
                      • Agree Agree x 1
                      • CanadianLori

                        CanadianLori Total Gardener

                        Joined:
                        Sep 20, 2015
                        Messages:
                        9,687
                        Occupation:
                        Battle Axe
                        Location:
                        Oakville, Ontario, Canada Zone 5A
                        Ratings:
                        +30,478

                        However for extended periods your plants will be wilted, then stunted.

                        Had first hand experiencewwith this last year.

                        And I landed up using landscape cloth as shading try to fight it
                         
                        • Like Like x 5
                        • Spacemunkey

                          Spacemunkey Gardener

                          Joined:
                          Feb 4, 2017
                          Messages:
                          146
                          Gender:
                          Male
                          Occupation:
                          Steel worker
                          Location:
                          Port Talbot
                          Ratings:
                          +270
                          I'll wait and see what the summer is like, fingers crossed it's going to be glorious For the time being I'll stick with the roof vents, louvre and door options. This greenhouse stuff can be expensive. Oh yeah I fitted my cantilever braces yesterday to make Doris even more sturdy :dancy:
                           
                          • Like Like x 5
                          • Agree Agree x 1
                          • Spacemunkey

                            Spacemunkey Gardener

                            Joined:
                            Feb 4, 2017
                            Messages:
                            146
                            Gender:
                            Male
                            Occupation:
                            Steel worker
                            Location:
                            Port Talbot
                            Ratings:
                            +270
                            One last question before I go to sleep, have any of you guys started sowing seeds yet for your tomatoes etc?? Please don't laugh as I've said in my previous posts, I'm totally new to growing and I'm really unsure when to start sowing. :help:
                             
                            • Friendly Friendly x 3
                            • ARMANDII

                              ARMANDII Low Flying Administrator Staff Member

                              Joined:
                              Jan 12, 2019
                              Messages:
                              48,096
                              Gender:
                              Male
                              Ratings:
                              +100,834
                              It's a straight enough question, SM:dunno::heehee: I'll start sowing Tomato seeds within the next week, but I think some members sow even earlier. I did try sowing earlier but found no benefit as the later sown plants caught up very easily with the earlier sown plants.........but others of the GC Gang might have a different opinion:snorky:
                               
                              • Like Like x 3
                              • Spacemunkey

                                Spacemunkey Gardener

                                Joined:
                                Feb 4, 2017
                                Messages:
                                146
                                Gender:
                                Male
                                Occupation:
                                Steel worker
                                Location:
                                Port Talbot
                                Ratings:
                                +270
                                Thank you Armandii, it's just I've been looking online and some recommend February others March. Also on the seed packaging it says between February and April. It's a little confusing for a complete idiot, I mean a complete novice such as myself lol
                                 
                                • Friendly Friendly x 1
                                Loading...

                                Share This Page

                                1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
                                  By continuing to use this site, you are consenting to our use of cookies.
                                  Dismiss Notice