with the number of plants I grow, I have to be very aware of pot size...larger the pots, more soil required so that costs a bunch for good soil and dangit if it isn't going up again this year...
99% of the plants I grow are in heavy duty 5 gallon nursery containers...the kind little trees come in...I have found these work well in for my grow season...all of the plants, chinense and annuums alike are likely to be very rootbound in late November...but that is cool because that is when I harvest anyway...
This year I will be growing 18 Trinidad Scorpion Plants that were overwintered...all of these will eventually see 10 gallon "smart pots"...