[Resolved] What size autopot To Parent Forum June 3, 2020 at 12:24 pm #439 ScottParticipant Growing in a 4×4 tent. Which would be better the 3.9 or xl June 3, 2020 at 12:26 pm #461 JoshKeymaster Hi Scott, it really depends on how big you are growing the plants and for how long…….. if going big the XL….. if growing smaller the 3.9….. it really is a matter of choice. Josh You must be logged in to reply to this topic.