As do I, but for totally different reasons. The first is that they are inconsistent — one year a patch will produce an explosion of flowers, the next it shows two or three somewhat begrudgingly. The next is that I have to dig and replant every 3-4 years, because they are very hardy here and the patches have the rhizomes coming out of the soil after a few seasons (and if you're thinking, "then don't plant patches!", yeah, actually the "patches" started as single plants, which is why I can go for 4 years rather than 2 now).

But they are VERY pretty flowers! And our deer hate them!