So i hear various information about sugar content with red maples. It my first year tapping reds and one silver. Next year i probably wont waste the tap on the silver it has not given much sap at all. All my taps are 5/16 spiles into 5/16 tubing that go into buckets with lids. This past weekend i bought a sap hydrometer so i could see what my sugar content is from tree to tree and species to species. All of my reds in the woods produced about half what the sugar maples did. With reds giving 1.8% and sugars about 2.0-2.3% but i have a red in my yard that gave 3.5%. So my question is do trees that produce higher or lower sugar content tend to do the same year over year. I know that the sugar % each year is different due to many factors but do certain trees tend to follow a pattern being better or worse producers year over year?