I tried three Gaillardias last Apr 2011, got them as seedlings already and have planted them in containers: Arizona Sun, Mesa Yellow and Arizona Red Shades. By July 2011 I got their first blooms, but in the following years, I have been too bad in watering, so it comes back sporadically and noticing too that in my area it is happiest coming back in early to mid Spring or in late summer to late Fall. I have often deliberated pulling them out and discarding them altogether, but they immediately get a reprieve from me, when I happen to see a bud forming again. So far it is either Arizona Sun or Mesa Yellow that ably comes back.
I have been really bad and mean with my Gaillardias, but somehow it manages to come back on and off. My garden gets too shaded once the city trees are leafing, so it adds to the predicament of getting sustained blooms in my garden. They love to have lots of sun and a bit stepped up watering here since we just get too hot and dry.