If I can grow these, anyone can grow these. They're not fussy as far as soil, don't really care if it's dry or wet (don't know about wet feet), extremely cold tolerant (at least a zone 5). Very pretty too.
My two year old blue & reds.
I put in 4 Red & Yellows & Wine & whites last year. Here's a red & yellow & a wine & white.
I also have some Leprechaun Gold and some Denver Golds. The Denver Gold has yellow flowers & the Leprechaun's Gold actually is a light green variegated plant (splotchy) with deep solid-purple flowers. As soon as they blossom, I'll snap some pics of them too.
Here's my deep blue Bachelor Button that's in my pond area. It actually sits next to a large delphinium.
