To give you an idea of size of pot, this plant is happy in this little pot. I will change it to a decorative clay one, but like the others said, in its native home, it is crowded amongst rocks.
Here's an off the wall idea...could you take out soil and add rocks and gravel to the pot it is in? Crowd the base with rocks?
Remember that children, marriages, and flower gardens reflect the kind of care they get.
H. Jackson Brown, Jr.