Well, it would very much depend on the location, or which colony. Here is a link to a thread from the Garden Restoration Forum. Interesting discussion of this very subject and the fourth post down offers book suggestions.

Welcome to The Garden Web. I'm sure you'll find a very helpful group of folks and lots of good information on many different forums. IMO the Search function can be your best friend. Also the extensive list of forums is helpful to get you started.

I'm sure your girlfriend's mother would love a book like that. Good luck, Sandy

Here is a link that might be useful: thread from Garden Restoration