Day 168 of Project 365. I bought this bamboo plant almost three years ago. When I did everyone kept telling me it would grow like crazy. It is still the same, I am not sure what I am doing wrong, but I am happy it is still alive. 
My bamboo plant which is three years old.
Pretty sure bamboo grows according to the amount of room it has. As long as you keep in in something small, like you are doing, that is probably as big as it will get.
Well this is a bigger pot. I moved it to this one about 6 months ago.