Discworld
In Terry Pratchett's Discworld series of novels, the term 'hedge wizard' is used to describe a wizard who specializes in the magical properties of plants. Although this does fit with the idea of a more rural wizard, given Pratchett's humorous proclivities it is likely here to be a deliberate pun on the word 'hedge'. For example, a character says: "If you invited a hedge wizard to a party he'd spend half the evening talking to your potted plant...and he'd spend the other half listening to it."
Read more about this topic: Hedge Wizard