I planted 'Primal Scream' back in April 2015, so it is really too new to make any meaningful observations. I was told that the plant would be one of the slowest to multiply out of the 20 + plants I bought at the time. It bloomed for me in late May, but still it is just two fans. It has a rust resistant rating of 2.0, and it did develop rust this fall, but I have several 1.0 rated plants that did as well. I was a little disappointed in the blooms this first year, I was hoping the blooms would be larger. But, being this is the first year, I won't hold that against it yet.
This is what it looked like in my garden this year when it bloomed:
