I just got here.
Altho my echinacea collection is small I bought #2 Hot Summers and a few Secret Joy to add to Summer Sky in 2012.
The first 2 never got taller than 6 inches the second season so instead of seeing plants increase they just never did much.
There was a article on Aster Yellows and I assumed that was the problem. I dug all the new plants and kept the unaffected older ones and chalked it up to a bad experience.
No more echies for me.The Ruby Giant,Purple cone that was here when we moved in and Summer Sky are all the echies I ever intend to have.