Narrowing it down would give better info. I'm thinking some states might need to be broken into several parts. Eastern vs western Oklahoma. Texas might be broken into 4-5 sections - lots of variation north to south and east to west here. And states with lots of elevation differences like North Carolina and Colorado wouldn't have the same growing conditions. On the other hand, a lot of coastal areas in different states could possibly be put together. That could be useful because I think the coastal areas grow a lot of daylilies.
