I'd be worried, honestly.... I've got 2 5gal containers in a 4'x2' tent (tangerine dream) and I'm fast running out of room at 5 weeks... doing a LOT of LST and leaf trimming trying to keep everything contained and the humidity under control... I'd HAD 4 5 gallons in there but had to move two of them to another tent - they were all competing for the light and it was impossible to keep the humidity under control! Hope you have an alternate plan if they get too crowded!