There are few things more Canadian than maple syrup. Almost 90% of world production is Canadian. about 73,000,000 litres. Quebec world leader with 70% of global production with Ontario second largest Canadian producer, contributing almost a million litres per year. Most exports are to United States, with smaller amounts to Germany, Japan and the UK. Yet strangely, it is the US which claims a National Maple Syrup Day--and on 17th December rather than in March, prime sugaring off time in most areas of production.
The zone where conditions are exactly suitable are comparatively limited. Only where early spring days herald below-zero cold nights and warmer days will cause the sap to flow in certain maple species. Only in northeastern North America, and especially Canada, are such conditions to be found. Even enthusiastic gardening President Jefferson discovered at his celebrated Virginia plantation was too far south for maple syrup production. Forget elsewhere in the world, even where suitable maples flourish. Japan, Korea, northern Europe, none have precisely the right conditions.
Where those are, however, the Sugar Maple, Acer saccharum, sap has 2 to 5% sugar content. It takes 40 litres of sap to make a single litre of syrup. This messy, sticky process is not for the home kitchen. It is instead carried out in a sugar shack or house, located in the sugar bush, where the sugaring off takes place.
A maple tree may be first tapped when it is 30- to 40-years-old. A yield of some 35 to 50 litres sap per tree, up to 12 litres per day may be expected, although some famous trees have produced more. Modern production utilizes plastic tubing and vacuum pumps, replacing staggering through snow bearing buckets of the precious liquid. Botanical cousins of A. saccharum, the Red Maple, Acer rubrum, and Black Maple, Acer nigrum, may also be tapped successfully. Less often are the Silver Maple, Acer saccharinum, or the Manitoba Maple, Acer negundo. The latter, while flourishing in its weedy way outside its named province, is particularly despised.
Ogden Nash must then be chastised, despite being a New Englander, when he claimed:
Fields are green and flower are gay!
Maples swell with syrup a-syruping!
Nature is spreading herself today!
Wes Porter is a horticultural consultant and writer based in Toronto. Wes has over 40 years of experience in both temperate and tropical horticulture from three continents.