Hobbyist Getting Started FAQ

Bigleaf maple is Acer macrophyllum and it is native to the North American west coast, from northern California to British Columbia, and primarily west of the Cascade Mountains. For biological-ecological information, see the the USDA Plants Database. Additional information can be found in publications and websites under the Hobby & Commercial tabs of this website.

Anytime you drill a hole in a tree you are creating a wound and the tree will begin a healing process just like other living organisms. We haven't found research studies, or heard from practitioners, that tapping bigleaf leads to tree mortality or increases the potential for mortality. A recent study by van den berg et al. published in the June 2021 issue of Maple Digest advises against retapping the same hole to rejuvenate sap flow that has tapered off. Thus, it may be better for the health of the tree to tap a new hole than to expand existing holes. However, that where that may be true for sugar maple we are not sure if it true for the much faster growing (i.e., putting on new sap wood) bigleaf maple. We are experimenting with 19/64" bits and the slightly larger 5/16" bit to get a better understanding of these differences between species.

When a bigleaf is cut off at the base for firewood or lumber it sends up new shoots. Bigleaf is a tenacious tree that is difficult to eradicate for those that try to do so.

Although the science of bigleaf maple sap flow is limited, based on conversations with tappers and scholars below are just a few of the variables we all can be trying to observe to see how they impact sap flow:

• The ground has low moisture content because of a change in soil moisture conditions;

• No or limited freezing temperatures to draw up moisture into the tree from the roots/ground;

• Trees are internally frozen or too cold (even when external temperatures are above freezing), thus negative pressure is preventing the release of sap to a tap (see Perkins et al. 2001 Maple News Pg. 6 for a detailed discussion);

• The tree vigor has declined and/or the tree is dying.

The sap to syrup ratio is roughly 80 gallons of sap to make 1 gallon of syrup. If that sounds like a lot of sap to make a small amount of syrup you are right, it is. Bigleaf sap has less sugar content coming out of the tree than sugar maples, but sugar maples also take a lot of sap to make syrup, 40-60 gallons. The amount of sap needed is a part of what makes maple syrup and other maple products extra special, i.e., the effort it takes to create a memorable, unique food. Other tree syrups from species like birch and walnut take even more effort because of their low sugar content and generally lower yields of sap. Though sugar maple may produce more sap, and the terrain can be less brushy to work in (though colder), there is a huge abundance of bigleaf (without hardly any active management to increase their population), and the trees can be much larger than sugar maple.

For hobby tapping you don't have to invest in expensive equipment like commercial evaporators, you can boil sap on your stove or through a slower method like an uncovered crock-pot over 24+ hours. If you use a crock pot you will likely need to finish your concentrated sap by boiling it in a heavy bottom pot to caramelize the sugars. The caramelized sugars are part of the flavor profile of maple syrup. As with jam or other sugary concentrates you have to watch it all times and take great care not to burn it. To become syrup your brix should be as close to 66.8 as you can get, that's the most shelf stable density of sugar. Too little it will be watery and have a shorter shelf life, too much and it will start to form sugar crystals (which is good if you are making maple cream!). When you are starting out, don't worry too much about making perfect syrup, just practice evaporating and getting the sugars caramelized for flavor, it will be delicious whatever it looks like.

One investment even a hobby level producer should consider is a small reverse osmosis (R.O). The R.O. removes water efficiently, making it so you have less water to boil off. See the R.O. section in this FAQ for more information.

Bigleaf maple tapping is currently done primarily by hobbyists but there is an emerging industry and a lot of commercial opportunity. As consumer awareness and demand for bigleaf leaf syrup and other products grows, so will opportunities for sap collectors and processors. It takes a lot of sap to produce a product like maple sap, so commercial opportunities favor producers with access to large numbers of trees. There is an equipment cost as well. It's possible to collect quite a lot of sap with simple setups like tapped trees going into buckets and then evaporating small batches over a wood fire or propane stove. However, other than hobby or very small commercial production, vacuum pumps, reverse osmosis machines, and other equipment needed to produce syrup for market can get expensive. Our suggestion is to start small and get a feel for how everything works. It won't take long for you to start seeing what the economic potential is for your particular situation.