Hey guys about to embark on a first try at growing marijuana planning on doing a basic soil grow with a couple plants in my closet. Heres what I don't understand though, how come everyone starts plants in tiny cup/containers, then transplants to bigger ones, and ive even seen people transplant there plants multiple times past that. Is there a reason for this? Do they require different soil when they are a seedling then once they are mature? Why don't people just start the seed in one big container that they plan on using the whole time? Is it common to transplant into a different soil for flowering? thanks guys sorry if this sounds noobish but ive been reading all I can and it isn't making any sense to me.