Vickie - For some reason, I was thinking you were in the south (like Florida) and they don't easily survive here, so I was impressed that yours were doing so well. But now that I realize you are in Indiana, I fully understand!!! I think your decision is probably a very good one!
I had them for about 2 years before they finally perished here. I loved them, the foliage was beautiful, and they spread the first year. But by the second year, they were diminishing and struggling. By the 3rd year, very few fans appeared. I still might have a few (very few) fans but haven't seen a bloom in probably 4 years.