I've never used Mulberry but I've read that it is like a mix of Apple and Blackberry briers. Of course, I've never tried Blackberry briers either so my post is pretty much worthless.
My neighbors cut down a Mulberry tree last year that was growing into my fence but they left a 4' tall stump. One of these days I'm gonna cut a hunk off from it to try.
-------------------- Shawn Wheaton
Missouri Waterfowl Association
Westside Chapter Chairman