my cousin has grown upside down in 5g buckets. i don't know why though. another freak technique he used, he'd dig a four foot deep hole with post diggers then drop a pvc pipe down it (3" i think) after that, he'd drop a seed in the hole, wait x number of days, and go back and get the whole tube (which by then would be filled with bud)

this worked for him, it never worked for me, and i think his stuff that was grown like that was some of the schagiest dirt i've ever smoked, but, there's my two pennies...

love, kp