“Interestingly, koi, when put in a fish bowl, will only grow up to three inches. When this same fish is placed in a large tank, it will grow to about nine inches long. In a pond koi can reach lengths of eighteen inches. Amazingly, when placed in a lake, koi can grow to three feet long. The metaphor is obvious. You are limited by how you see the world.”
~Vince Poscente~
I have a cactus plant that seem to follow that same path. Grew to the size of it's little pot and stayed that size for years. I finally replanted it in the bigger pot and it is now more than doubled in size in a matter of months.