Birch sap has started to flow in Northern Vermont. For anyone interested in birch syrup, I've added a real-time birch sap flow monitor to my maple sugaring website. Here's a sample, showing the temperature, flow rate and total sap for the last day, from one tap.



The webpage is here...
https://howsitrunning.com/birch-season-for-1-tap/

I hope some find this useful, and I'm always looking for feedback, thanks...