The requirements for growing coffee are drastically changed in an environment that isn't overgrown with civilization. Plus the temperatures are different this far into the future, combined with increased global warmth (likely due to the apocalypse). We're already talking sub-tropic around here when it's not snowing. PLUS magic.
I'd need to run some tests, maybe an experiment or two, and definitely get a hold of some seeds, but I bet I could get together a pretty wicked coffee plantation in no time.