Birch Sap
You know we get maple syrup from the sap of maple... ...an, who I believe lives in Minnesota, noticed his birch tree was dripping sap after being trimmed. So he... ...unt of information at that link on the science of birch sap and the techniques for its harvest and for pr... ...prune when the sap is running)....
https://www.neatorama.com/2011/04/11/birch-sap/
