Syrup season is upon us. In the Hudson Valley, maple trees produce sap by the end of February to mid-March. So if you have a sugar maple in your backyard, it’s prime tree-tapping time. The syrup makers at Crown Maple have offered up their expertise in making that sweet, sticky stuff we love.“We’re in the heart of our harvest,” Crown Maple CEO Michael Cobb says. “Maple syrup production is an agricultural process. With freezing nights and warming days, the trees are thawing and making a lot of sap.