Right, maximize that root area! I have a fairy frost with some monster sized cotyledon or whatever the first set of like round leaves from the sprout is called, and I noticed my last grow I could have used some more space with 3 gal so I think I'm going to purchase 2 5 gal pots to grow 2 ladies in and see what happens. I know they say don't transplant autos but I have 3 in starter pots that will b going to final pots very soon. Wanted to dial in my watering amounts and germination methods so I used the starter pots but anyway I'm 2 final pots short for the 10 plants growing and started so I'm going to run 2 in 5 gal pots and see if there's a difference. I bet you could grow a monster in a 7 gal with them green thumbs you got bro