While southeastern PA may not be the powerhouse maple producer that New England is, we certainly have our share of sugar maple trees. And we also have cold weather, which is a necessary component of making maple syrup.   Maple syrup comes from the sap of maple trees (sugar maples tend to be the best variety). Tapping a tree is a relatively simple process, but determining the right time for optimal flow can’t be predicted too far in advance. Since the sap tends to flow best when nights are below freezing and days are in the 40s, February and March are often the best months to collect sap in this…