I'd like to see one of those 18-24 month hazes where the plants were vegged to maturity and then flowered in a tent with an LED (300W-600W). But you sure wouldn't be able to "let them grow straight up," lol, unless it was a really tall tent (which would also be cool as you'd be able to give a penetration-report but it's probably not at all realistic). And you'd probably run into trouble trying to grow six plants in a tent of that size when their period of stretch was between 50 and 67 days. Be closer to one plant trained all around the tent (and back again lmao).
A real RPitA I'm sure. But it would be helpful for a lot of reasons.
And then there are those sativas with REALLY long flowering times, lol. The "one grow per year inside or out" kind that'll let a mundane keep up with the mental processes of a schizophrenic... But they're awfully hard to find these days with all the indica-polluted "sativas" (no offense to the indicas, I like them too - just not in my sativas).
I just recently started catching up on this thread, lots of cool stuff, but wow!!! I need more info on these year long sativas, never had any bud like that before...