I'll be growing a few autos this summer outside in containers. I've grown some in the ground before but never in containers. From what I've read so far most people grow them in 3 or 5 gallon containers. My first thought is to grow them in 10 gallon containers. I'm thinking an average 2 foot plant will fill out that sized pot in the course of its life. Am I being silly, crazy, over the top, wasteful and unnecessary or not? What size containers does everyone on here use???