The Health Benefits Of Birch Sap And Harvesting Techniques

victoria ward
Mar 17
3 min read

silver birch tree in woodland — Silver Birch Tree *(`Betula pendula)*

Collecting the sap from Birch trees is a popular spring tradition in many countries, particularly in Eastern Europe, Scandinavia and the Baltic states. Traditionally Birch sap tapping was also practised throughout the Scottish Highlands.

As the sap is ready around the time of the Spring Equinox, it makes the most perfect spring tonic to rejuvenate and detoxify or to incorporate into a detox regime.

From late February to April, sap rises in Birch trees (Betula pendula), before the green leaves emerge you may observe swollen buds on Birch trees indicating the sap is rising. Around the middle of March or the Spring Equinox is usually the peak time for abundant sap to take from the trees. You can test for the rising sap by inserting a knife into the bark and watching for the trickle of it from the tree.

silver birch trees in woodland — Silver Birch Tree

What Are The Health Benefits of Birch Sap?

This sap is a perfect spring tonic and has the following qualities-

Hydrating
Rejuvenating
Immune-enhancing/stimulating
Antioxidant rich
Detoxifying
Diuretic
Cleansing and purifying
Stimulates the metabolism aiding weight regulation

Which Trees to Select

Correctly identify a mature Silver Birch tree, you will be looking for a tree with a trunk of at least 25 cm diameter. Look for the tell tale swollen buds.

How to Collect Birch Sap

Collecting Birch sap is very similar to the process used for maple syrup collection. Usually the most effective way to collect the sap is by drilling into the chosen tree with a cordless drill about one inch deep and inserting a tube allowing the sap to drain into your container. A 5 litre container left overnight should fill. After you have collected the sap you should seal the hole with a twig or dowel.

Alternatively, if you do not fancy drilling into the tree you can cut a branch and insert into a bottle and collect that way but you will end up with less.

Be mindful of over-harvesting the sap, aim to take no more than a gallon per tree to avoid harming it.

Fresh Birch Sap will keep for up to five days in a refridgerator, and 2-3 months once fermented or even longer as a syrup.

Fermented Birch Sap

Birch sap ferments naturally and quickly, within 2-3 days, adding raisins to the sap will boost the process to create this sweet/sour slightly bitter, probiotic-rich substance excellent for gut health. The fermented sap will be slightly sparkling.

Birch Sap Syrup

If you have collected 5 litres then you need to reduce it by 95% by steadily boiling it down over a day until you have a thick syrup consistency. It will need stirring regularly as it starts to thicken to prevent sticking and burning.

The sap contains 1% natural sugars and once it has reduced you will have a lovely syrup which is sweet and tangy and use like you would Maple syrup for cooking and as a dressing.