Maple production can be classified as one of nature’s wonders. Maple sap cannot be collected just any time of the year. Alternating episodes of freezing and thawing cause the sap to move (flow) within the sugar maple tree, and this only happens for a few weeks in the spring and fall. Spring is when most of the maple syrup is produced, because weather conditions are generally more favorable for sap flow. However, there are some limited studies of autumn maple production to determine if more economical use can be made of our maple forests.