Good question! I can only comment on what I've used.
I was lucky enough to score some 10 gal. hard foam traditional style (bigger at the top than bottom )pots, a few years ago, at a garage sale. I grow outboor/organic. I FIM and LST my plants ruthlessly. I veg for 3 Mo. It's rare for me to have a plant taller than 6 ft. (but they're often 6 ft across)I used to grow in 5 gallon pots and let a few of them escape the torture. These plants averaged 13-14 ft at harvest. I encourage you to use the largest pots you can afford to fill. I think size reduction techniques for most outdoor growers is pretty much a neccesity. It also increases the size of the root ball. Big roots=big plants. (strain dependent of course)...Good luck...BB
BosqueBoy Reviewed by BosqueBoy on . Outdoor Growing In Pots: Question on Size I see a lot of folks doing outdoor grows in pots. I see the advantage of this in terms of greater control over the soil, plus portability. My question is what size pot is best for the final stage of veg/flower growth? I've seen many 6ft tall plants in 3 gallon pots, and yet some people use 32 gallon trash bins. Obviously, if I can get away with keeping them in 5-7 gallon pots, that would be great. Feedback appreciated! Rating: 5