Winter-like temperatures should be returning next week after this thaw. That is good news as our maple sugaring season is here.
A productive sap flow in maples occurs as a result of freeze-thaw cycles: hours of below freezing temperatures followed by hours of above freezing temperatures. During the below freezing period the resultant negative pressure causes liquid to be drawn up from the roots into the tree. This mixes with the sugar stored in the tree’s tissues.
As the temperature rises above freezing the pressure becomes more positive. The tree is like a giant water balloon. Put a small hole in it (e.g., a tap) and sap leaks out.
The sap flow will continue until the freeze-thaw cycles end. However, once the trees begin to bud the different chemical composition of the sap renders it unusable.
Currently, spring is the best time to take advantage of the freeze-thaw cycles. Manufacturers are exploring the possibility of using autumn cycles as well.
Welcome early spring with a demonstration on maple sugaring this Sunday, March 2 from 2 – 3 p.m. at the nature center. Enjoy a talk and a stroll through the woods to learn how maple syrup is made. Learn to identify maple trees, how to tap and collect the sap and how to turn that sap into delicious amber syrup. Please call to register 269-927-4832 x 101, space is limited! Member/$5, Non-Member/$8, Children/$3. Maple treats will be available for sale.
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