I do not have a lot of luck with Echinacea so I buy the three inch pots from SRG or GHS, at certain times of the year they are on sale and I can get them pretty cheap and I do not get so stressed out if they die. I had given up on having a yellow Echinacea because the two I purchased the previous year did not come up and the two I purchased last year did not come back, then the one I planted the year before came back, I did not know till it started blooming yesterday and I was thrilled. I will try more as I find them on sale but the two companies I mentioned they always have sales and 3 inch pots.
All of mine came back as two foot clumps that are covered in buds, the orange one is actually 'Hot Paypaya' and it did nothing last year, maybe one flower but some take a year to settle in and the one I thought was dead came back the following year and that was 'Cleopatra'.