Resin and Sap Production

Tree trunks are reservoirs for sap and resin, substances vital for both tree health and human use:

Sap: A sugary liquid transported in the phloem. In sugar maples (common in Ontario), sap production peaks during the freeze-thaw cycles of spring.  Sap is a vital energy source for the tree and aids in healing wounds by forming protective layers when exposed.

Resin: A sticky, aromatic substance produced by conifers like pines and spruces.
Resin acts as a defense mechanism, sealing wounds and deterring pests. Humans use it for products like varnish, incense, adhesives.

Seasonal patterns:
In addition to sugar maples, many other trees produce sap differently depending on the season. Some oaks, birches, and even conifers have smaller sap flows.

Composition:
Sap isn’t just sugar; it also contains water, minerals, and hormones that help the tree grow.

Healing & transport:
Sap transports nutrients from leaves to roots and stores energy for winter. When the tree is injured, sap can coat the wound and prevent infection or fungus.

Human uses beyond syrup:
Maple sap is boiled into syrup.
Some tree saps are used for traditional medicines, drinks, or even candy.

Defense mechanism:
Resin is sticky and can trap insects that try to invade the tree.
It contains chemicals that repel pests and can fight off fungal infections.

Long-term storage:
Over time, resin can harden into amber, which preserves insects and other organic matter for thousands or millions of years.

Uses:
Resin is processed into turpentine, rosin, and varnishes.
Some cultures have burned resin for smoke in rituals or used it in traditional medicine.

Variation by species:
Pines, spruces, and firs produce resin differently. Some exude it freely; others store it internally until needed

 ~9.5L of sap = 1 cup of syrup
To visualize this think of a 5 gallon jug (the ones you put on a water dispenser) and realize it takes a little over that much to render less than 2 cups of syrup... typically just over 1c.