Quote Originally Posted by Michael Greer View Post
Chances are you won't get any sap from other species.
No, you will get sap from numerous other species walnut, birch and many soft maples. In Europe where they dont have maples they often tap birch. Problem is all of the other trees typically have <1% sugar so you're boiling 80l of sap to get a little of very dark, strong tasting syrup!