Are you saying there is an upper limit to our indoor gone outdoor thoughts? I would like to hope that 15 lbs is possible with a 2 season monster in a 100 gallona tank. I cannot imgine culturing roots that long in a dwc environment tho. Im afraid I have much more to learn than I have already. Its like the saying... The more I learn the less I knew..
I think the strain is more important then the size of the bucket. I feel a lowland equatorial plant crossed to a dense budded indica would be the type of plant you need to hit the 5 lb threshold. JK
Till i came on this site never herd of any body growing 4 lbs a plant have lernt so much about growing trees indoors. i think it is strain mainly but could be done in hp aero or at least that my dream but what do i know the likes of jk have been growing for donkeys years and tried most of the methods and strains out there. We keep learning and trying to break that threshold.