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Forcing bloom: Manipulating photoperiod for out of season harvest

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  • 2 Legal Co
    replied
    Originally posted by Crusader Rabbit View Post
    That's so cool. So you just need two pipes and a U-joint. Notice that he didn't unroll it over the roof peak and on the downhill side? It might be hard to control in that situation. You'd be holding back the weight and the far end would want to slide down on its own.
    You noticed that too? Yeah, I think it's only good for 'uphill' roofs, unless you were to put it on a reverse tensioning device. i.e. a rope on either end that spools up then coming open and unspools when closing?

    Inquireing mind, May get me into trouble yet!

    Or maybe a simpler thing would be to have the dead ends at the high point, with 2 rollers. Opening the 2 halves up to the center? hmmm

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  • Crusader Rabbit
    replied
    That's so cool. So you just need two pipes and a U-joint. Notice that he didn't unroll it over the roof peak and on the downhill side? It might be hard to control in that situation. You'd be holding back the weight and the far end would want to slide down on its own.

    Leave a comment:


  • 2 Legal Co
    replied
    T Y CR;

    I redid the link. Try it now.

    Leave a comment:


  • Crusader Rabbit
    replied
    Originally posted by 2 Legal Co View Post
    Here's a quick and dirty roll up top. Could be used to either open the top or use it over the clear with a black tarp for black out?

    http://http://www.youtube.com/watch?v=sj0bTU5Fs2o

    Your link doesn't work for me.

    But since I'm here, this is a link to a motor designed to drive window shades. This should work well for a smaller system.

    http://www.laaudiofile.com/addamotor.html

    Leave a comment:


  • 2 Legal Co
    replied
    Here's a quick and dirty roll up top. Could be used to either open the top or use it over the clear with a black tarp for black out?



    http://www.youtube.com/watch?v=sj0bTU5Fs2o

    EDIT; Try it again. Not a motor, but a manual crank.

    Leave a comment:


  • al-k-mist
    replied
    Originally posted by Durdy View Post
    Anyone ever seen an automated black out cover that went up and over a greenhouse? Not just pulled across a flat roof?
    Yes, rigged from an automatic garage door motor
    didnt see it on the greenhouse, tho, but knows it works

    Leave a comment:


  • Dkgrower
    replied
    If u want to have an automated black outsystem the cheepest way is to find 1 second hand and a greenhouse that fits the deminsions.

    Leave a comment:


  • 2 Legal Co
    replied
    Originally posted by Durdy View Post
    My GH is 10' x 20'

    going to purchase a 20' x 30' tarp and pull it over at night and remove in the morning.

    Mine is also to block out neighboring light sources, not light dep

    Might set up a mini light dep though to get an early harvest!

    Anyone ever seen an automated black out cover that went up and over a greenhouse? Not just pulled across a flat roof?
    Never a 'black out', but I vaguely remember one back home 'commercial GH', that had shade cloth in strips. Bottom/side was on spring loaded rollers. Top had a rod in a gusset, pulled up and across by a winch. Best I've seen, to remember anyway.

    It'd be a major re-build to get to 'black out', I'm afraid. You'd need to run an 'interior' set of hoops... with everything atrung/attached to or below them, to get a clear pull, so the 'cover' could slide over the interior set in one pull... or maybe two (one from each side up to the middle?)...

    Might be easier to do an exterior set and pull it over the whole thing?... with the 'take up' edge being attached to a roller, to pull it 'off'. Moveable edge would need to be one rod with 3 or 4 pulling cables, probably running in a 'channel' to keep from chewing up the clear skin. The pull cables would attach to a 'take up' rod, so you could pull all of them evenly. Probably need either 2 operators, or an adjustable brake on the cable side, so when you go to remove it there is still resistance After it crosses the high point..

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  • Guest's Avatar
    Guest replied
    My GH is 10' x 20'

    going to purchase a 20' x 30' tarp and pull it over at night and remove in the morning.

    Mine is also to block out neighboring light sources, not light dep

    Might set up a mini light dep though to get an early harvest!

    Anyone ever seen an automated black out cover that went up and over a greenhouse? Not just pulled across a flat roof?

    Leave a comment:


  • 2 Legal Co
    replied
    Glad to see this thread is coming to life.

    I'm needing all sorts of info on GH... Just going to do a little bitty one for now.

    Colo. compliant, and all that ya know.

    Leave a comment:


  • oceangrownkush
    replied
    If anyone finds any links to light dep box build outs post em up, I'm gonna look at the different frames used for just straight gh's.. Its as simple as building out a gh with panda film rolls in the right dimensions to cover them into darkness at the proper hour daily. PVC would be great material, would be easy on the b/w plastic... Looking into this for some late/early bumper crops to supplement the natural season seedmothers..

    Edit; Found this framing guide for a reg greenhouse... I like the idea of wood gh with stapled panda film sheets on either side of each dimension in the gh construction.. On a few of the roof and a few of the wall sheets of panda cut holes at opposing sides in different places so that air can flow freely without causing light leaks.. Add a few feet of ducting to the intakes wrapped around framing at an angle, passive in/out airflo.... Veg plants indoors, flo out, or throw some lights up and add fan to outdoor gh and veg out flo out... Thinking this could make my life a lot more productive..

    Oh yeah the frame design;
    http://www.thingstobuild.com/greenhouse-1.html

    2nd edit; In first paragraph I am thinking light dep w/panda coming up/down to manipulate hours, 2nd paragraph is after I found wooden designs and thought it would be awesome to have just straight black box w/permanent panda plastic and take plants in/out of box at correct time to get 12 hrs light... I think 2nd idea would be better/sturdier...

    Leave a comment:


  • GEMiNi GENETiCS
    replied
    I'm in need of a light dep tent inside of my greenhouse I'm building this spring ... Not to force flower cause that's not the issue .... I'm in a suburb and everyone has security lights .... So gotta block out that light .... Gh will be 16L x 8w x 6/8h(6at walls &8 at center peak)

    My idea is in august put up a PVC frame that is same size as my gh but down sized 1' everywhere to fit all the plants in and just roll down light blocking plastic every night at 7 or so and roll it back up in the morning ... Good thing is 2sides of the gh have a fence against it so I'll just keep the black out up there .. Doesn't effect light exposure ... So I only have to cover the roof and 2walls


    Anyone ever tried creating a huge "bag" out of white poly and hot glue it together and just make them individual for each plant ... Cut a few slits at the top for hot air and moisture to flow out ... Any highdea's

    Or something I just thought up in conduction w the "bag" idea .... Make teepees for each plant and clip black out plastic to each teepee every night for a larger mini tent to prevent the plants from getting condensation on the buds all night long

    Just tossing around some ideas in my head .... Wanted to get your take on it ... Tweaks new ideas more than welcome ... Luckly I have till august to figure this out .... Oh I'll only have 5plants in ground with atleast a month veg time indoors before going out in late may

    Leave a comment:


  • Husky Jackal
    replied
    Howdy all, a lil plan here.
    I'm planning to use light deprivation this year, but not early in the season.
    I can keep plants out until November 5-10. The problem is that some strains slow down the flowering process when it gets colder and not finish as they should.
    So I plan to force flower a sativa under a tent from 1st of August until September 22 (when it's 12/12 where I'm at) then let it finish naturally.
    What do y'all think about this ? Any helpful tips or ideas are welcome.
    Peace, HJ.

    Leave a comment:


  • weeddaddy50
    replied
    sweet

    just about to get started in my GH


    Originally posted by al-k-mist View Post
    see this

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  • al-k-mist
    replied
    see this
    Attached Files

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