Ah, okay. I don't know much about them, but that explains it. I was surprised at the price compared to the rest of the perennials they had available.
I'll keep an eye on them and hopefully the price comes down a bit. Their current SALE price is 3 for $100. And they were in 3" or 4" pots. I was a little disappointed, cause the muted purple and burgundy colors were pretty.