3 gallon vs. 5 gallon

Hey guys I need some advice. I currently have 9 plants in 3 gallon pots. My setup is an indoor grow and I have 8 plants in 3 gallon pots. Should I leave them in 3 gallon pots or move them to 5 gallon pots, I plan on flowering this Friday. Let me know what y'all think.

Preciate it.

5 gallons. Bigger roots=bigger yield.

it alldepneds on if they nedd it or not if u ont eg long then u dont need huge containers cuz the plant wont use all the soil any way

I would generally go with mouthmeetsoap's advice. It depends a little what your setup is like, though. If you are running a SOG or SCROG with lower light (400w or less) and small plants, 3 gal would be all you need. Soiless (passive hydro) also needs less room for roots.

Thanks guys my setup is a 400 w hps system. Got nine plants under it that have not been sexed yet. Should I wait to get the females and then transplant when sure about the females?

I'm lazy, so would wait until they showed sex. The extra space in the 5 gal. pots probably won't be needed until they get to flowering.