In soil, they dont get very big. Id say they bind up at about 12-14".
In hydro however, Ive let them get to about ummm.. 32" or so? Im sure i could let em get even taller, but i prefer shorter to aid in light penetration. THis last grow, they all got really crowded, so im going short next try.
When i emtpy the tubs after harvest, the roots arent even near crowding the tubs. These babies grow fast when im doing it right, so Im gna easily say that hydro requires less root mass than soil. In my soil grows, the roots seem to get crowded in these little tubs.
Anyhow, I dont use the tubs for soil unless im running a BS 12" plant or so. Hell, ive got 3 of those little tubs with soil in em, growing some freebies sent to me. Sometimes i just say to hell with it and find some old dirt. IN the tub it goes, watered with whatever leftovers from my ponics, maybe some tap water too. But alas, there will be NO MORE soil in my house. The soil brings risks of pests. Ill save that shit for outside monsters.
o btw. I carry these out a small door, around a corner, up my stairs, thru another door and into the bathtub sometimes. For pictures in decent color, i carry them up the stairs and thru 2 doorways. Aside from the plant hitting the door frames, and some water drizzle on the floor. NO MESS!!
I have actually left a pretty big plant thats harvesting, sitting out on the grow room floor. I was thinkin' let it dry for harvest and learn how long they can go before drooping. Amazing enough, that big plant didnt show dry for about 3-4 days. Thats in my grow room, getting 1000w light from 30" or so. So no paranoia about leaving the gals out of their main water tub for 48hrs or less. Call me nuts, but if its easy for me to handle, its simplistic for sure!!
So, can i get some rep? Even if im totally full of crap, this is a ton of typing and maybe even comprehendable? Some pity points for having an ugly ass dog? lol
Happy growing!!