Here's why: "Maple syrup is hot-packed, just like jam," Sorkin says. "Sugar is a very good preservative but once opened it can develop mold on the surface if left at room temperature." ...

Opened organic maple syrup, when refrigerated, only lasts six months to a year before it grows moldy. On the other hand, when maple syrup is not stored properly, mold will grow a lot quicker.

While Costco’s Kirkland Pure Maple Syrup is a popular buy—it only costs about $15 for 1 liter, depending on the season—storing the product properly is important. After all, those large-size goods are ...

Visitors to Codorus State Park have the chance to discover how maple syrup is made, from sap to syrup, in free one-hour educational programs offered at the park during the spring season.