I did not realize it could be such a space hog. I have had plants for 5 years. BUT, I've moved them quite a bit in those five years (three house moves, several garden reorganizations). Perhaps they have never had a chance to get really settled in. I will be sure to keep an eye on them. Maybe take part out every year and stay ahead of them. Also, mine bloom for quite a long time. Interesting the variation people have had.
