Wow! I forgot about responding in this thread... Sorry for the delay, all. Excellent ideas, everyone, thanks!
How about just putting up a light blocking screen on that side of the green house. It sure seems like adding a screen would be cheap, and possibly easier then talking to the neighbor. Plants do not need absolute darkness, they just need mostly darkness. Think about how bright the moon is for half the month?... Now that flood light might be a bit to much, but a simple light blocker would solve that.
Awesome! Yeah, I think that's probably the best option for me. It turns out that indeed it's a rarity that the light is left on, by accident it seems. But although Mrs. Sweetleaf & I have been away for a few days, a light-barrier is already underway!
Have you considered reenforcing the roof by inserting rebar into the pvc to prevent the sagging?
Awesome idea, but the sagging is actually not for the PVC frame, but for the plastic sheet itself. The rain, when coming down strongly during nasty weather (which is only occasional but indeed inevitable), pools up almost exponentially-- like how an avalanche starts with just a few loose pebbles... And before long, there's a massive puddle dipping the plastic down as a loose but effective gigantic bowl, weighing-down the entire structure, threatening to spill a pool of water onto your plants. So although rebar-support to the PVC may help a bit, the problem is an effect of the plastic having no support beneath it; not so much that the PVC is too weak. These photos show last year's hoop-house I built, and the issues a no-support roof can bring when it rains:
So I'll be criss-crossing nylon cord up across & down the top-bar of the roof-peak, zig-zagging like a bunch of Xes along each side of the roof. It should be enough to prevent the problem from beginning & escalating. I'll let you guys know!
Personally I'd get a roll of 6 mil plastic sheeting and do it high and wide enough to that the light doesn't hit any of the greenhouse and keep doubling up till it's fully blocked or really faint. Easy way is zip tie 2" x 2" x ?' every 4 foot to the fence and staple gun the sheeting to that. Could reinforce the plastic where you are going to staple with duck tape so it doesn't tear as easy...
SuperNutz, you're hired! I'll see you Saturday! Awesome idea... You sound quite industrious! Your idea actually reminded me that I already have something like that already built and already outside near the damn set-up! I made a ghille blind (like a portable wall of an artificial camouflage grass-material) onto some tomato racks, the legs of which secure down into PVC pipe-stubs that are zip-tied to & poke-up from milk-crates. I used these as a portable camouflaged wall for when growing discreetly outdoors.
I can just add a tarp or shower-curtain liner to it, adjusting it's height according to my needs here. And that fence makes a great spot to secure things, like you said! Thanks!
