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small greenhouse project need advice

This is a discussion on small greenhouse project need advice within the General Orchid Culture forums, part of the Orchid Culture category; So I just put a kit greenhouse together and I have been fooling around trying ...

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  1. #1
    boatguy is offline Junior Member
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    Default small greenhouse project need advice

    So I just put a kit greenhouse together and I have been fooling around trying to get the temps down so it will be a greenhouse and not an oven. So far I am at 88f at midday and 77f at night. I have a fan going 24hrs for air circulation and wet gravel for a floor. I have put all different manner of plants in it to help control the temps and humidity. ( I don't have enough orchids to fill it up) Anyway I am quite new to this and really enjoying it. Any words of wisdom will be greatly appreciated.




  2. #2
    Forrest is offline Senior Member
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    Ahh the RIon! Nice choice. I have that same one. You dont mention where you live, but judging by the palms in the back I am going to guess somewhere warm. You are going to need to buy an exhaust fan and an inlet, I would put them both on thermostats so when the greehouse reaches a certain temperature the exhaust kicks on and the inlet opens. You will also need shade cloth. I am at sea level in Northern CA> and I use about 70% all summer, it is probably about time for me to roll it back to 55% before I remove it for the rainy season. Also you are going to want something automated for humidity, either that or you need to go get yourself a ton more plants right away! ( I suggest doing both hehe). I dont know how cold it gets at night but you will want to think about a heater if it cools down below where you want your plants to stay. The insulation on these guys is not going to hold a 70 all night if its 50 outside. Soooner or later it will turn to outside temperature.

    Here are a few pictures I took of mine a while back in the growing area thread. In one of the pictures you can see I built a structure to keep the shade cloth off of my roof, this is because it was trapping heat by leaying on it and I also have some automatic windows that open up top and this allows them to do so more freely. Adding the extra space there really helped to keep things cool. So with my 70% shade on when it is about 70 outside it is about 80 inside, just something to keep in mind. Those numbers increase dramatically with out shade. You can also see my exhaust fan in the back wall, and you can catch a glimpse of my inlet on the left side front there.

    Anyway, here is the link to that thread. http://www.rv-orchidworks.com/orchid...ight=show+grow

    If you have any specific questions fire away or send me a pm, I would be happy to tell you everything I know about these units.

  3. #3
    bench72's Avatar
    bench72 is offline Moderator
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    Tim
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    Great looking greenhouse boatguy, and I agree with Forrest about needing extra orchids in there

    Also, thanks for this thread as I think I have also found a mini greenhouse so this is a very pertinent issue for me at the moment. Let us know how you go with ensuring temps are within growing range.

    Forrest, thanks for the pointer to the other thread too... love seeing how everyone grows their stuff.

    Cheers
    tim

  4. #4
    boatguy is offline Junior Member
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    O.K. , so I went to the Lowes today and loaded up on .88 Cent annuals to provide more plants for temp control. I already have the shade cloth up on the roof and will try to elevate it tommorow. I have this crazy idea about growing confederate jasmine on the outside and my vanilla planiflora on the inside to add in temp control. (Hope it pans out) Anyway my idea is to try and avoid expensive cooling systems if at all possible. I live in St. Petersburg, Florida. My personal orchid favs are Ecyclia Tampensis and Cyrtopodium Punctatum because they are native and you never get to see them in their habitat. I have a dream of giving them away to other florida orchid lovers. First I must get proficient in their culture. So far I am having good fortune with the Tampensis but it has been slow growing with the punctatum (cowhorn).
    I will put up some additional pics on Sunday. Thank you much for the replies :-)

    Boatguy

  5. #5
    Forrest is offline Senior Member
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    cool man, well I can appreciate not wanting to shell out the dough for a cooling system (no pun intended). These greenhouses can get real expensive real fast. Seems like I am always messing with mine, though I do enjoy it so maybe that is why. Anyway you and anyone else with a hobby house that is new to cooling should read this, its real simple and shows temp diferentials under diferent scenarios.

    http://www.igcusa.com/greenhouse_coo...nformation.htm

  6. #6
    starwhiz is offline Member
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    Default thanks for the info

    Nice GH for a newbie! and Thanks for the informative links Forrest!

  7. #7
    Tanya's Avatar
    Tanya is offline Senior Member
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    I should keep my mouth shut because I have no experience in growing anything inside a green house. But everytime I see a pic of a green house in a hot and humid place like Florida, I can almost feel the heat. Its those glass. Isn't it easier the keep the g/h cool if you keep the glass off the side of the g/h? Just the shade cloth. I visited a number of green houses in Shen Zhen few days ago and all of them have open sides except for the shade cloth and its nice and cool inside. Anyway, its just a thought.

  8. #8
    Forrest is offline Senior Member
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    A lot of people grow in greenhouses in hot and humid environments. The reason is that it is much easier to control whats inside than what is outside. With the help of fans, heaters, shade cloth, and cool cells you can keep the internals of your gh just about anyway you want. That is the reason one would go with a gh instead of a shade house. Now if all they wanted to do was drop the temp a few degrees a shade house would be much more economical.

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