It takes about 20-30 gallons of boiled down maple tree water to make one gallon of light amber colored syrup, labeled as Grade A.
Late in the season, maple sap thins out even more. Much more than 20-30 gallons of sap must be boiled down to yield syrup of equal sweetness. Boiling down more sap to concentrate the sweetness also concentrates the flavor and nutrients.
This late season syrup is darker, more maple flavored, and higher in minerals than the Grade A syrup and is currently labeled as Grade B.
The blander, lighter syrup typically commands the highest price as consumers tend to prefer sweetness without too much flavor.
Consumers in the know, however, choose the Grade B syrup for the higher mineral and nutritional content. These savvy consumers have long enjoyed lower prices for the Grade B product, but this may be at an end.
New international standards for labeling maple syrup have come into effect such that Grade B is no longer used. The new system for categorizing maple syrup is designed with the express purpose of eliminating discrimination against the darker syrup.
As a result, all maple syrup is now Grade A with four identifying colors: Golden, Amber, Dark, and Very Dark.
With all syrups labeled the same, equality in pricing is the anticipated result.
So, stock up on cheaper, darker Grade B if you still can. Once the inferior Grade B is removed from the label, this most flavorful and nutritious of syrups will be commanding a higher price much the same as the lighter colored, blander, and more plentiful syrup.
An important thing to also know is the very different production practices between conventional and organic maple syrup. The linked article details these differences that will likely have educated consumers switching brands in a hurry!
Sarah, The Healthy Home Economist