Quote Originally Posted by khronik
In my experience, pot size correlates with a plant's resistance to stress.
This is absolutely correct. And soil chemistry is easier to monitor in ample soil.
Also, a larger pot with more space for roots means the plant can uptake more food and water and grow more vigorously, and ultimately support more mass, including bud mass.
Allow yourself about a gallon of soil per foot of main stem on your plant.