We usually buy a few of the Kim Queen ferns to sit in the corner of the deck. It grows very well and seems to like being root bound. They seem to have a personality and I end up carrying them in for the winter. Each year I repot them into a bigger container until finally they get too big to move. Last year I left a big one out for the winter through some sub freezing weather and had to cut the root ball up to move it in the spring. I visited the dumping spot later and found thousands of small ferns sprouting from the ball.
This is a small piece of the root.