Preferred climate for maple sugar production
Hi - There are a couple of reasons that maple syrup is produced primarily in northern climates. While most species of maple can be tapped for their sweet sap, the sugar maple has a significantly higher quantity of sugar. And sugar maples grow best in colder climates like New England and Canada. The other factor is that maples are most productive when there are alternating hard freezes and mild days in early spring. Those conditions are more prevalent in northern climates.
It is possible to tap our red maples here in North Carolina to produce syrup, it's just a lot less efficient than it is in the north.