I'm afraid you prpobably won't get much help here -- Little Rock, at least in my experience, is considered part of the south and not the Midwest -- but I can't find a forum that seems to cover Arkansas so I'm not sure where to tell you to try posting. I have limited experience visiting Little Rock so I can't help much, either, except to say they're slowly getting some nice restaurants and they have a wonderful symphony. Not exactly garden-related, however :) I remember being there at the end of November and it was in the 90's. Good luck!

Try the Ozarks Forum. I visit it quite often as I am from Arkansas, but have been in Iowa for 30 plus years. I often think about going back myself since I could retire now. Love the soil here, but hate the cold weather.