Willinator,
I have not been growing daylilies in pots for long, and the season is early, but I do have one plant that I potted up in several different pots back in the fall and I believe every pot of it has sent up scapes already. It is an older plant 'Debbie Durio' Durio, 1974. It is listed as an early and has a 1.0 rust rating.
I think a lot of commercial growers grow daylilies in pots, and they all seem to do well. I have had over 200 in pots this year, and only a few have not done well and I think that was my fault.
There might be a shorter list of daylilies that do not do well in pots, I really don't know of any, but some people on here might have some suggestions.
