What is probally the best pot grown bamboo for a 20-24" pot that will not reach more than about 7 ft in height & be survivable outside on a patio in central Mississippi?
Most Effective Pot Grown Bamboo?
This site might be a good start on the variables like height, sun/shade, clumping vs running, and cold tolerance you are looking for.
Of course personal experience is best, so any input you get you could also consider. My pot is 24" and I have a sweetshot bamboo, but my zone is 9b / 10 so that may help you.