Need a little help.

[S.W.I.M. 504]

im gonna grow outdoors but i need to grow in a pot. how big should the pot be for a sativa that might grow to be 4- 6 feet. thanks.

[The Green Reaper]

1 gallon or more per foot of growth. Are you growing in a swampy, rocky, clay or poor ph area?

[S.W.I.M. 504]

it sounds stupid but the only place i can grow secretly is in this alley wich is concrete.thanks