no such thing as too big a pot. but it can slow down growth as plants will focus on root growth b4 foliage.
yea very true. bigger pots offer lots of advantages, the increased soil not only give you more space for roots, but any nutrient or pH changes are buffered by the extra soil. in small pots, nutrient (deficiencies and toxicity) levels jump around, and its harder to gauge what exactly your plant wants. in big pots, the changes between peaks and dips isnt as pronounced.
i vary my grow around, i flower in a 3x6 closet, and i either have 4 small pots in there while the 2 big pots are vegging hard, or vice versa. right now, i have the 2 big (24x24x24in) pots in there, and using LST, and topping, and everything, and even tho the canopy is only about 1 foot higher then the soil, it covers the entire area. now, after my final tie down before the long haul to harvesting, its all about upward growth, and hopefully that will be just buds. these 2 plants have been cut so many times that im counting around 11 tops on one, and 7 on the other. otherwise, the 4 small pots would have about 3 tops each...
the yield will be MUCH higher on these 2 big plants then 4 small ones.