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Greenhouse build.

This is a discussion on Greenhouse build. within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; I've never seen the shade cloths put on the inside before. Any particular reason for ...

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  1. #31
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    I've never seen the shade cloths put on the inside before. Any particular reason for this ingenuity Steve?
    See, this would be good for future reference for me seeing as when they get put on the outside, they use up even more space and someone who will remain nameless hates the idea of the green shade outside!

    Cheers
    Tim

  2. #32
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    I've never seen the shade cloths put on the inside before. Any particular reason for this ingenuity Steve?
    Shade cloth in the UK is put on the inside in a lot of cases.
    It is really easy to put up as i found some plastic do-dahs that simply twist into the aluminium glazing bars.These can also be used for bubble wrap.
    I know that with the shade cloth external it helps to keep the heat down in the g/h but we rarely get really hot days.
    If it causes to much heat build up then i will change it to external.

  3. #33
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    Piccies of the plants(well most) in situ.


  4. #34
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    Excellent.

    Once you've been growing them in there for a while, I'm really curious to hear about any differences you find between GH growing and growing under lights.

    I know I've said that already, but I really don't know anyone who's done HPS and GH growing too, so definitely relying on your observations here!

  5. #35
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    A bit early to make any comparisons but it only takes 20 miutes to water/feed them compared to 1 1/2 hrs in the growroom.
    Temps are supposed to be below 50f for the next couple of nights(yes it is June in the UK) so i hope my heater from my growroom is upto the task.

  6. #36
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    ...And you were doing so well uncasteeb...then you had to put that shadecloth on the inside of your brand new greenhouse. I've seen it done in large commercial settings, but never in a (relatively) small hobby greenhouse.

    I would strongly suggest you reconsider...You would need to provide "stand-offs" to allow your autovents to operate, but an air space between the cloth and the roof is a good thing as far as cooling goes.

    Why you should have the shade cloth on the exterior...

    1. As I mentioned above, and air space between the roof and the shade cloth on the exterior will keep the cloth from acting like a blanket, holding the heat 'in.' As you have it now, space between the shade cloth and the walls will trap the heat inside.

    2. The shadecloth will act to dampen the air circulation...air would flow more freely against the polycarb walls...

    3. You're going to provide a lot more surface area for algae and fungus to grow with this stuff on the inside...Trust me, algae will grow on the polycarb walls, but not so much on the roof, at least with the shadecloth on the outside. But you're configuration will promote even more algae growth...even on the inside of the roof. It's hard enough to clean the algae without having to remove and reinstall shade cloth, which will also have to be washed...

    4. Your plants may stay too wet for too long if the fans are trying to evaporate moisture from the shadecloth as well as your gravel and growing medium...

    5. Seems like this arrangement would make it harder to hang plants and organize your benches close to the walls...

    6. I'm a stickler for greenhouse cleanliness, and this just don't fit. Botritus thrives on moist, cool, environments, and this looks like the perfect setting for an outbreak.

    I'm not sure as to your shade reauirements in UK, but remember that most orchids need all the sun you can provide them to prosper and bloom. Your location looked rather shaded, and if you're worrying about heating, maybe you could do with a little less shade. Moving plants from inside to a greenhouse will require some adjustment to the increased light, but don't overdo it. I have to be very careful here in coastal South Carolina where it can get extremely hot and humid, but my plants get full sun (in my polycarb twin-wall greenhouse) all winter, and I just put my shade cloth back up about a month ago...I'm not trying to be critical, just offering some (hopefully)constructive thoughts...

    c.

  7. #37
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    Constructive ideas/critisms are fine , how i wanted to do the shading was in removal panels.I,ll have to attend to this before any descent weather hits the UK(today it reached an amazing 72f in the g/h & tonight temps are forecasted to be in the 40,s).
    My major concern is for sunburn as most of these plants haven,t seen full spectrum light for 9 or 10 months so even the high light plants will need a descent amount of shading until they get used to it.
    The g/h is basically East/West & gets full sun from 9.30am to about 4.30pm , this was enough to turn a Paph rothschildianum yellow last year with 50% shading on my mini g/h so thats what i based the shading on.Some panels may be ok with lighter shading but i need a bright day to do some testing with my light meter.
    I stood for nearly 2 hours figuring the best way to do the shading early tonight & i think i,ve a plan.
    I,ll post up the results.

  8. #38
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    Well the plan worked.A bit Heath Robinson but it,s definately better than the way it was.
    I used 3 pieces of 2" X !" timber , notched 1 end so that it located on the ridge.Screwed an eye bolt into both ends of the timber & used polypropolene rope to secure the timber @ both end of the g/h & 1 in the middle.Stapled the shading to the wood so that it touches the glazing(quite slack).This allows me to open the 2 roof vents to their fullest extent & the vents push the shading clear of the glazing.
    Still not 100% but it allows me to put up the shading on my own & it will store very easily( just roll the shading up on the timber).Will have a look @ the shading & maybe try some lighter shading @ the weekend.

  9. #39
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    That's great. So now the shading is on the outside. I also think that's a much better plan in terms of maintenance and plant health inside.

  10. #40
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    Sounds good uncasteeb...I had faith in you...

    Many US growers have started using Aluminet shade cloth.

    It reflects much of the heat that is typically absorbed by other shadecloth, keeping the greenhouse a bit cooler while letting in the same amount of light....and besides, it really looks spiffy with the shiny polycarb and aluminum frame. Here's a couple of pics of my greenyouse several years ago when I was just getting it started.

    http://home.earthlink.net/~wisejt/id1.html

    I've added additional side bars since then to hold the shadecloth off of the roof...I'll try for some new pics this weekend...

    c.

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