It was 20 F when we out to tap the maple trees this year, but the wind wasn’t blowing and the snow didn’t start falling until we were wrapping up. When it warms up in a few weeks, it will be too late-the sap will already be flowing.
We primarily set taps in silver maple trees. All of the native maples, including black, sugar, silver, and box elder, produce sap that can be boiled down into maple syrup. We just happen to have a large amount of floodplain, and a corresponding large amount of silver maple trees.
We also tap, to a lesser extent, box elders and sugar maples in the uplands. What difference does it make? Silver maple sap typically has between 1.5%-1.75% sugar in it. Black or sugar maple sap typically has between 2-3% sugar. And box elder sap has 1% sugar.To make syrup, we need to boil the box elder sap twice as long as the the sugar maple sap, and the longer it boils, the darker and richer the caramelization. It boils a long time, because we have to take the sugar concentrations from 1.5% sugar (sap) to 66% sugar (maple syrup).
Maple syrup is the first crop I harvest every year, and tapping the trees for it is my own personal act of faith that spring is about to emerge, in the form of sweet flowing sap from the maple trees.