While I don't know Memphis weather I've been waiting all summer to plant out some perennials I potted up earlier this year. Fall's the time of more frequent rain and good root growth. Are you finding lots of good buys at the nurseries? Broad leaf evergreens like Rhododendron might make me pause unless they had nice solid root balls. Lots of water and maybe an anti-desiccant spray the first winter would go a long way to insuring success though.
