I am not saying that its not important....but when you are growing in organic soil and not adding anything, you need a big enough pot that it holds enough soil to get you successfully through that grow and depending on how long you plan on vegging, a 3 gallon pot won't cut it. Growing in coco, you won't ever have to worry about not having sufficient nutes to make it through.....you just might have a smaller plant.
Anytime you are in a bigger pot, your have potential for a bigger plant and as it relates to yield, a better yield.
Anytime you are in a bigger pot, your have potential for a bigger plant and as it relates to yield, a better yield.