I have 2 in flower, 1 in a ten gallon planter in soil, and the other in a 20 gal DWC tote. I go that big because I have enough overhead with the strains I grow, and I've found my soil plants rootbind long before theyre done in a 5 gallon bucket. I do transplant to a 5 gallon bucket along the way, but do a final transplant to a big 10 gal. planter before putting in flower. I prefer to grow a couple big plants as opposed to scrogs or sogs here, not really concerned with quantity, although I do get monster yeilds from my big plants. But it's all personal preference.