Category Archives: Urban Herb Walks

Hallowe’en in the Park

I took a walk through Frankendael Park’s woodland today, to connect with nature a little more this Hallowe’en.  What a breathtakingly beautiful day it turned out to be and how delighted I was to find so many reminders of what Hallowe’en or Samhain is really about.

Samhain marks the time in the pagan calendar when the “veil between the worlds” is said to be thinnest.  Meaning that it’s the time when it is thought that the dead and the living are most able to communicate with each other.  Hence the spooky associations most people have with Hallowe’en.  I prefer to think of this date as a time to say goodbye to those who have departed during the previous year, remember those from years gone by and to look at how the old and new live alongside each other, learning from each other and leaning on each other.

So my sunny Samhain walk in Frankendael helped me reflect on this as I took in some of the sounds, smells, tastes, images and feelings aroused by the plants and animals.

Here are a few photos of herbs which stood out today, old and new, living and dead, cohabiting and helping each other…

By the way, I am turning off all comment options for my posts.  Spammers are an interesting group and they are overwhelming my email account with nonsense.  So if you have genuine comments please find my email address and send me a message 🙂

Lime leaves & flowers – sandwiches, scented water and drying (NL:Linden, Tilia)

Yesterday I walked to a local public garden and harvested a carrier bag full of leaf and blossom sprigs from Lime/Linden (Tilia) trees.  These trees smell great at the moment. Whole neighbourhoods are perfumed by Lime flowers, loaded with nectar to attract hoards of bees.

If you pluck clean a clean lime flower from a tree in a safe location, you may like to eat it directly. They taste sweet and aromatic with a hint of bitter tannin. The aroma which will fill your mouth, nose and mind is uniquely delicious and has been highly prized, by many cultures, for centuries.  Lime flowers will quickly release a little glutinous, sweet mucilage as you chew.  More details about properties of this amazing tree in the main post on Lime.

So with limited space and time…
How to dry tree leaves and flowers.

  1. Once home, lay out the harvest on a light surface and discard any rough, diseased or otherwise unhealthy looking leaves, flowers or sprigs.
  2. Allow time for bugs to escape and find them a new home if they seem lost.
  3. My harvest was partly covered in a dried black film – originating from greenfly droppings in the canopy – so I then used scissors to separate the flowers from the leaves.  99% of the flowers were unaffected.
  4. Gently but thoroughly wash any dirt or film from the leaves, using cold water.  If you wash the flowers you will loose the valuable nectar and pollen.
    (It was very difficult to remove the black film from some parts so I discarded these and added them to my balcony pots as a mulch)
  5. Dry the leaves with a clean tea towel or muslin.
  6. Lay out the leaves and flowers separately to dry, on clean paper, cloths or trays.
    (I spread my harvest out on my dining room table, with a clean, absorbent, cotton table cloth beneath.  The room used needs to be well ventilated and fairly warm to facilitate good drying)
    This could be done in a very cool oven, I prefer to save electricity and let time do the drying.
  7. Turn the harvest from time to time to allow all surfaces to dry.
  8. If necessary, when the herbs feel dry to touch, move them to a more convenient drying area.
  9. Keep checking and shifting the herbs around to facilitate drying, for as long as it takes them to become completely brittle.
    (The flowers will dry much more quickly than the leaves, which could take 3 weeks)
  10. Inspect again for mould, unhealthy looking herbs.
  11. Store in glass airtight containers.Uses:
    Lots of information is given in the main Lime post but here are couple of others…

    • I couldn’t wait to use some of my harvest so I made Lime leaf, blossom and Amsterdam honey sandwiches for lunch.
    • I also added a few flowers to my cold water bottle this morning.  The water tasted and smelt very fragrant after about an hour.  It tasted far better than any shop bought, flavoured water and had the added benefit of a few cooling, gooey flowers to chew on during my 30 degree Dutch class.  The flowers would also look very pretty in a decanter of dinner table water.
    • Lime is magical – if you have the chance, give it a try!

Lime (NL:Linden) for Magical Midsummer Happiness

City bees are dizzy with happiness at present. The sweet perfume of Lime (NL:Linden, Tilia spp.) trees fills the air in many streets and parks, attracting bees from far and wide.  This tree looks wonderful, can grow to a stately height, is great for wildlife and it’s flowers are used to make the best herb tea and honey on Earth (well, I think so anyway!).  The Lime tree is able to calm our nerves and bring us happiness.

The tree is easily identified. It has a classic tree shape, if allowed to grow unchecked, has large heart-shaped and sharply toothed leaves which are smooth above. Lime flowers hang yellowish-white from the trees from Midsummer to July, not necessarily all over the tree. There are often burrs on the handsome trunks.

Uses

  • Linden flower tea is very popular here in the Netherlands and across the continent.  Lime grows abundantly in the UK yet is less widely used.  The French prize the herb tea made from Linden flowers above most others and call it Tilleul.  It was used traditionally in Europe to treat nervous disorders such as hysteria, nervous vomiting and palpitations brought about by stress.
  • Linden honey has been highly prized for generations, has a heavenly taste and carries many of the properties of the tree.
  • Lime wood is excellent for minutely detailed carving and turning, being close grained, strong, durable and unattractive to woodworm.
  • Lime bark has been traditionally used in Europe to make baskets and fishing nets.
  • The sap is plentiful in spring and has a high sugar content.  It can be tapped in the same as Maple and Birch.
  • The leaves can also be made into a tea/infusion whereupon they yield an extremely thick (mucilaginous) and cooling drink.  They also make a simple and tasty sandwich filling.
  • It is found by many to be helpful for coughs, colds, fevers, headaches, inflammation, as a diaretic, general tonic, to calm the gut and to soothe nerves.
  • In general this herb is thought of as soothing, relaxing and promoting feelings of happiness.

Narcotic intoxication:
Lime blossom is easy to harvest, dry and use but as with all herbs, it should be treated with great respect.  Harvest when in full bloom and all should be well but beware that Lime blossom tea can produce a mild, non addictive intoxication.  Flowers left on the tree too long before harvesting are said to have a more intoxicating effect.  The mildly intoxicating effect of appropriatly harvested Lime makes many of us feel happy. It also makes Lime extremely valuable to those seeking to enter a state of trance and other magical journeying.

On a spiritual level, Lime is renowned as a tree herb which can help relieve grief and induce feelings of vibrancy and youthfulness.  To appreciate these qualities it is said that you should carry a small bag, filled with dried Lime leaves, or that you place them under your pillow.

How to harvest Lime/Linden.

Harvest from mature Lime trees, in as clean and unpolluted an area as is possible.
Choose a dry day, preferably before it becomes too hot and after the dew has dried.
Snip off young healthy sprigs, containing blossoms and a few leaves, from branches which you can reach easily.
Respect the trees and harvest sparingly.
Spread the harvest out on a clean dry surface, preferably on trays so air can circulate easily.
Leave in a warm, well ventilated place for 2 – 3 weeks, until the sprigs are thoroughly dry and brittle.
Store in sterilised airtight containers.

How to make Linden/Lime tea and infusion.
You can make Linden tea by simply steeping a sprig of fresh Lime in a cup of boiling hot water for as long as desired for taste.  Or you can use a teaspoon full of dried crushed herb per cup.

To make an infusion place about 5 tablespoons of crushed dried herb in a pot or jar which holds about 500ml of water (you could scale this up to suit the size of your container).  Add 500ml boiling water and leave with a tightly fitting lid and without heat, for between 4 and 8 hours (preferably overnight).  Then strain, separately retaining both the herb and infusion.  The infusion should be good for 24 hours if refrigerated.  Return the “used” herb material to the pot and add about 300ml of boiling water.  Simmer gently, for up to 2 hours, after which a very mucilaginous fluid should be obtained.  Again this should be good for about 24 hours if refrigerated.

Thank you!

Many thanks to the lovely people who came out for my second Midsummer Herb Walk, this morning in Frankendael Park.  Yet again, I thoroughly enjoyed sharing information about some of my favourite herbs and as ever I learnt lots of new things from fellow urban herbies.

We found and talked about several herbs which were not on the handouts. Here are a few photos and names to help you learn more about them. If I have forgotten any and you need the details please let me know…

Motherwort (NL: Hartgespan)
Leonurus cardiaca

Feverfew (NL: Moederkruid)
Generally known by the botanical name Tanacetum parthenium

Cleavers (NL: Kleefkruid)
Galium aparine
How to make the juice

Mullein (NL: Koningskaars)
(Verbascum thapsus) – a beautiful “wooly” specimen (as generally used in US and seen in most of the herbals) is currently growing outside the entrance of the Netherlands National Funeral Museum (Tot Zover), within Oostergraafsplaats – next stop out of town on number 9 tram.  We looked at Moth Mullein (Verbascum battaria); not wooly, smaller.  Photo and details of the herb are on the handout.

Comfrey (NL: Smeerwortel)
Symphytum officinale

Wormwood (NL: Absint-alsem) – the feathery one which I brought along from my geveltuin.
Artemisia absinthium


Sunday Midsummer Herb Walk, 26th June 2011

Today’s Midsummer Herb walk in Frankendael was super.  The sun came out, so did many beautiful flowers and also 9 other lovely Urban Herbologists.  As several other people contacted me, asking for a weekend walk, I am going to offer the Midsummer walk again this coming Sunday, at 10am.  So…

Join me for another Urban Herbology Wild Herb Walk on Sunday 26th June 2011 at 10:00.

The walk will be in Frankendael Park, Amsterdam, starting at the main (old) gate.  I shall wait just inside the entrance, by the bike racks (entrance in this photo..)

Handouts, including photos, notes and recipes, will be provided.

We will…
Take a relaxed look at useful wild herbs which are plentiful at this time of year.
Share ideas about how to use them in food.
Consider some of the herbal medicine uses.
Talk about some interesting herbal folklore.
Meet others who are interested in herb foraging in Amsterdam.

The walk itself will last for at least an hour and previously we have continued chatting over cups of herb tea and cake in Merkelbach restaurant, which sits within the park.  This Sunday is the monthly organic market called Pure Markt, so perhaps you would prefer to go there afterwards to buy some tasty organic food and drink.

The cost for the walk is €5 per person.
Places are limited to 15 so please do contact me via email if you would like to attend.  The Urban Herbology www.meetup.com group can also be used to sign up for this.

I am really looking forward to seeing everyone this Sunday and having a relaxed look at some of the herbs which are currently available in this beautiful park.

Midsummer’s Day Herb Walk in Frankendael

Join me for another Urban Herbology Wild Herb Walk on, Tuesday 21st June, Summer Solstice 2011 at 11:00 13:30 (Please note, I have changed the time slightly)

The walk will be in Frankendael Park, Amsterdam, starting at the main (old) gate.

Handouts, including photos, notes and recipes, will be provided.

We will…
Take a relaxed look at useful wild herbs which are plentiful at this time of year.
Share ideas about how to use them in food.
Consider some of the herbal medicine uses.
Talk about some interesting herbal folklore.
Meet others who are interested in herb foraging in Amsterdam.

The walk itself will last for an hour or so and previously we have continued chatting over cups of herb tea and cake in Merkelbach restaurant, which sits within the park.

The cost for the walk is €5 per person.  Places are limited so please do contact me via email if you would like to attend.  The Urban Herbology www.meetup.com group can also be used to sign up for this.

I am really looking forward to seeing everyone on Midsummer’s Day and having a relaxed look at some of the herbs which are currently available in this beautiful park.

Dandelion (Taraxacum officinale, NL:Paardenbloem) – Ways to eat it

Dandelion flowers abound in Amsterdam! Don’t they just look wonderful?  Whether you find this plant a pest or a blessing, those woolly, yellow flowers, atop long toothed leaves, rarely fail to catch the eye and could help to keep you healthy.

Most people can easily recognise Dandelion, it has been used medicinally for hundreds of years and well worth understanding.  Taraxacum officinale is amongst the most common weed-herbs in urban areas.  Those magical clock heads, full of parachute assisted seeds, can spread far and wide from mother plants. It can colonise most urban spaces including balcony and rooftop pots. It loves nitrogen rich soil but can manage in most sunny locations. If you walk through a city park this week I am confident that you will be met by hundreds of cheerful dandelion flowers.

Dandelion is known as a bitter herb but it is also salty and sweet. It works as an internal cleanser. As with other bitter greens, the taste stimulates bile secretion. When first taking or eating this herb it can act as an effective laxative and strong diuretic. It loosens things up as Susun Weed says in her extensive writings on the herb in Healing Wise (also contains lots of recipes not listed here).  Amongst other things Dandelion contains high levels of several vitamins and inulin which can help to regulate blood sugar levels. It is packed with nutrients and is helpful for a great many disorders. Dandelions that are at least two years old contain higher concentration of inulin so are more useful medicinally.

A beautiful dandelion found it’s way into one of my roof terrace perma-pots last year. Its leaves and flowers will be gracing my table in the next few weeks – but how? What to do with Dandelion to  make it taste really good rather than just something that tastes good for you?  Here are a few ideas:

Italian Dandelions
Large Dandelions are apparently only eaten cooked in Italy and are known as Catalogna.  The toughest darker leaves are not eaten and Italian recipes call only for those closest to the heart of the plant.  Puntarelle is a smaller Italian dandelion variety which is sometimes eaten raw, served with oil, salt and pepper. With both sizes, the leaves cut into strips and the Puntarelle may then be soaked in cold water, whereupon they curl up attractively.  Serve dressed with oil, vinegar and perhaps chopped anchovy.

Italian cooked dandelion (From The Silver Spoon cookbook)
Cut the tops of inner leaves into strips.  If you have access to lots of Dandelions, allow about 200g (7oz) per serving. Cook through (15 -20 minutes) in salted boiling water and serve hot dressed with olive oil, salt and vinegar or lemon juice.

Dandelion with garlic and olive oil (From The Silver Spoon cookbook)
Cook 1 kg sliced dandelion leaves in salted boiling water for 15 mins.  Drain and squeeze out as much liquid as possible.  Heat some olive oil in a frying pan and add 4 whole garlic cloves, stirring as they fry gently, to become golden brown but not burned.  Remove and discard the garlic cloves, reserve the resultant garlic oil in the pan.  Add the cooked dandelion strips to the garlic oil and cook on a slightly higher heat for a further 15 minutes, stirring occasionally.  Season to taste with chili powder if desired.

Dandelion with Parmesan (From The Silver Spoon cookbook)
Cook 750g sliced dandelion leaves in salted boiling water for 15 mins.  Drain and squeeze out as much liquid as possible.  Chop coarsely and place in a warm serving dish.  Melt 65g butter in a small pan and when it turns slightly golden pour it over the dandelions. Sprinkle with 4 tablespoons of grated Parmesan cheese and serve.

Other Ideas:
Add chopped Dandelion root to Kitchadi
– Kitchidi is an easy to make, nutritious, easily digested, traditional one pot Indian dish. Lentils and rice are cooked together with some vegetables.  Find a recipe that appeals and add some chopped Dandelion root.

Ayurvedic dark leafy greens
Cook a good handful of Dandelion leaves in boiling water and strain. Perhaps save the cooking water for soup if not too bitter.  Then brown ½ tsp cumin seeds and then add 1 tsp coriander powder to brown lightly (in ghee) in a skillet.  Add to the drained greens and serve immediately.

Dandelion leaf Juice
If you enjoy making fruit and vegetable juices, consider adding a few Dandelion leaves to the mix.

Dandelion and Burdock cordial
There are many recipes online and in traditional British cook books.  Here’s a simple recipe.

Dandelion leaf  and flower salad
I think this speaks for itself.  Simply add a few Dandelion leaves and flowers/petals to salads.  It looks great and tastes far more robust than lettuce.

Dandelion flower fritters/pancakes
Simply add whole flowers or petals to a regular pancake or fritter batter.

Dandelion Flower Pickles
You need to collect tightly closed flower heads for this recipe.  Here’s a very interesting pickle making link.

Dandelion Confiture (Cramailotte)
Thank you Sonja for passing on this idea.  Here’s a link to the recipe in Dutch, others in English can be found online.

Dandelion Root Coffee
Made by roasting cleaned, chopped dandelion root.

Dandelion Wine
Delicious!  Many recipes available, here’s one adapted  from the Self Sufficientish website…

Ingredients:
About a bucket full of dandelion heads
2 litres of boiling water
Juice of 2 lemons
1kg sugar
1 teaspoon of yeast

Method:
Put flower heads within a muslin/jelly bag, in a bucket and pour over one kettle of boiling hot water.
Mash it ( with a masher and within the muslin/jelly bag) to extract all the “juice”.
Allow to cool and filter through more muslin into a demijohn.
Make up sugar syrup by mixing the remaining 1litre of water with the sugar.
Allow to cool again and add the yeast.
Top up the demijohn with water and insert airlock correctly.
Leave to ferment then syphon and bottle.

Dandelion leaf Tea
Used by some to treat various disorders such as eczema and as a general tonic. Chop leaves and infuse as a tea.  Can be taken freely.

Dandelion blossom tea
As for leaf tea.  The petals themselves are far less bitter and more pleasant tasting than the green sepals beneath so perhaps pluck the petals out and use alone.  Can be taken freely.

Dandelion Tincture
Pack a sterile glass jar with clean chopped dandelion herb (all parts) and fill all spaces with vodka.  Leave, sealed, in a coolish place for 4 – 6 weeks.  Strain and take as desired.  Can be taken freely but of course it is mostly vodka.  Most take a teaspoon daily.

Here are a few other online recipes which may be interesting…

Curried Dandelion

Dandelion Fried Rice

Dandelion Columbo

Dandelion Saute

Dandelion Sesame

Dandelion Flower Biscuits

The uses for Dandelion are apparently endless!  I am now off to try it as a skin tonic…

Cleavers Juice (Galium aparine, NL:Kleefkruid)

I while ago I posted about the benefits of Cleavers and how to use the herb, including how to extract the juice using a cloth.  Here’s a slightly high tech (and faster) method which I used this afternoon…

Firstly, please remember the foraging/picking rules and only harvest and use if you are 100% confident you have correctly identified the plant. Woodruff (Galium odoratum) looks like Cleavers but is tougher and grows low on the ground (it doesn’t climb). It can be used to infuse foods with a vanilla-type flavour. Beware of Madder (Rubia tinctorum) which looks more like Sweet Woodruff than Cleavers, but sometimes gets confused. That is used for dying fibres and should not be eaten. Here’s a useful post about the tiny seedlings of Cleavers (in January)

(12/1/25 – Today’s walkers – It was so lovely to meet you! I hope you find Cleavers – We didn’t see the little seedlings today but soon you will notice them, then the plants will grow up and tall. Let me know how you get on with your foraging 🙂

  1. Wash and drain a good handful of freshly picked cleavers
  2. Remove any unhealthy looking stems, rooty/yellowy ends, grass, other material etc
  3. If the cleavers seem very wet from washing perhaps blot dry with a clean tea towel.
  4. Roughly chop the stems.
  5. Add a little clean water to the blender, perhaps enough to half cover the blades.  This is just to prevent clogging. Then add the cleavers.
  6. Blend use the chopping setting, or pulse on full power, until it seems to be nicely pulverised.
  7. Strain through a jelly bag, muslin or clean tea towel, into your collection jar.  I also used a funnel to make collection easier but this is optional.
  8. The juice should run out quickly.
  9. Finally wring out any remaining juice through the jelly bag/muslin/tea towel
  10. Compost or return to the earth, the remaining pulp. This afternoon I used it to help mulch a balcony herb pot.
  11. Store the juice refrigerated in an air tight, sterile container. Remember to label the jar and lid clearly.  It should keep in a fridge for a few days but if you notice anything unusual, such as discoloration, changed smell or taste then pour it onto soil and start again.
  12. Please read the post about benefits and directions for using cleavers.
  13. Generally the dose for cleavers juice is 1tsp up to three times daily as a tonic.
  14. Start with a very small amount when you try something new and if you notice any negative reaction then stop using and water your plants with it. That said, this is generally thought of as a safe, nourishing and cleansing tonic which has been used in many countries, as a folk remedy for many many years.
  15. A handful of cleavers yielded about 200ml of juice today.  I plant to freeze some in an ice cube tray this evening as 200ml is more than enough for me to use as a tonic over the coming days.

Nettle Pasta – Strettine (Urtica dioica, NL: Brandnetel)

I love nettles and I love making fresh pasta. Here’s a little information about nettle and a great recipe which combines the two.

It is best to make use of stinging nettles (Urtica dioica) when they are young (in late March and early April – before they start to flower). I prefer to use them in strong overnight infusions, as a leafy veg in cooking and as a hair rinse.  The resilient perennial Urtica dioica is sure to be found fresh somewhere near you and dried nettle is quite easy to find from herbal suppliers.  It grows well in nitrogen rich soil, is present above ground almost year round but to avoid woodiness only harvest until it comes into flower.

This herb is packed with vitamins and minerals, is extremely nourishing and energises the body and mind. Taken regularly it can build strength in many ways.  I’ll post lots more about nettle in future but for now here’s a link to an informative post by Susun Weed about nettle and how to make effective, strong nettle infusions from dried herb. There are a many recipes available which include nettle, in my experience many are quite bland. However many traditional Italian recipes feature nettle and taste very good.  Here is a simple, tastey combination of pasta and nettle.  Stinging nettle tops are ripe for the picking at the moment, so it’s a great time to try this recipe.

Strettine – Nettle Pasta
120ml nettle purée
360g Italian tipo 00 flour
2 eggs
good pinch of salt
good pinch of black pepper

  1. Make nettle purée as follows: Harvest about 200g of healthy nettle tops, clean them before adding to a pan of boiling water. Boil rapidly for 2 minutes. Strain and place the wet, cooked nettles into a clean muslin, jelly bag or tea towel. Wring out until the nettles become quite dry. Blend the nettle in a food processor until smooth. You need about 120ml of nettle puree for this pasta, freeze the remainder for later use.
  2. Seive the flour onto a pastry board or clean worktop.
  3. Mix the nettle puree, salt and black pepper into the flour.
  4. Form a well in the centre of the nettle-flour mix and break the eggs into this well.
  5. Use a fork to lightly break up the eggs in the well and use it to start working the nettle-flour into the eggs.
  6. Use your hands to work the rest of the nttle-flour in with the eggs.
  7. When all is basically combined, knead the dough with your hands to form a smooth pliable ball.
  8. Wrap with a clean cloth or clingfilm and place in refrigerator to rest, for about 30 minutes.
  9. Now the pasta dough is ready to roll and cut.  Divide the dough into three roughly equal pieces and pass through the rollers of a lightly-floured pasta machine. Work through the machine several times until until you have obtained a smooth and elastic sheet, at least through roller setting number 3.
  10. Pass the rolled sheet of pasta through the tagliatelle cutting blades.
  11. Dry the taglietelle a little by spreading it out on a clean cloth or a pasta drying stand. Allow to dry at room temperature for about 15 minutes.
  12. Cook in salted boiling water for 2-4 minutes, until al dente.
  13. Strain and serve.

Tapping Birch Blood (Betula spp., NL: Berk)

This afternoon I was privileged to collect and drink sap from a mature birch tree in a friend’s Amsterdam garden.   Today’s tapping was something of an experiment, the process went quite smoothly and we managed to collect about 75ml of Birch Sap (Birch Blood) in about 20 minutes.  I shall certainly be trying it again on other trees, hopefully this spring.

[If you would like to learn more about this in practice, check out my blended learning apprenticeship course.]

Allergic to apples = allergic to Birch
It seems that those with an allergy to apples are very likely to be allergic to Birch sap and thus should avoid it.

Benefits of drinking Birch blood
Birch blood or sap is a weak solution of nutrients which were stored in the roots over winter and are pumped up through the trunk and branches in spring, for the tree to use in new growth.  The sap is drawn upwards through a system of vascular cells, from roots to crown by osmotic pressure. It is mainly water and contains some vitamins (mainly C), minerals (mainly potassium, calcium, magnesium and zinc), amino acids, fructose, glucose and other fruit sugars.  It is clear (not blood red), has a slightly soapy appearance when shaken and has a refreshing watery taste with a hint of birch aroma, a little sweetness and perhaps little bitterness in the aftertaste.  Some say it can taste slightly of Wintergreen, I’m not sure I could taste that today but there was certainly more to it than water.  Sugar content in Birch blood peaks in the middle if the tapping season.

Across cultures, there are a great many health claims associated with drinking Birch sap.  It is said by many to be an excellent spring tonic, to help prevent scurvy and rickets, to help relieve rheumatoid arthritis and gout symptoms, to ease symptoms of multiple sclerosis, to accelerate the metabolism, to help with diabetes myelitis, to help kidney disorders and to cure birch pollen allergy symptoms.  That’s quite a reputation to live up to!

I recommend Hedgerow Medicine by Julie & Matthew Bruton-Seal for further information about the virtues of Birch.

Which birch trees and when?
Sap should only be collected from healthy birch trees, with a base trunk diameter of at least 25cm.  The owner’s permission should be obtained before attempting to collect any sap and care should be taken to prevent further damage to the tree during and after tapping.  If drilling a hole, use a very clean drill bit and insert very clean collection materials.

If you can reach the branch tips of a birch tree in spring, you could break off the tip of a twig and watch for dripping sap.  If it happens quickly, this is a good sign that the sap is flowing well and that it may be possible to collect from the trunk.  Spring time, before the leaves form, is the best time to collect birch sap.  Some say that the best time to collect is when the nights are cold (below zero) and the days are warm.  The tapping season varies depending upon climatic region but it generally only lasts for a month or so.

Some say the same tree can be tapped yearly, others say no more than once every three years.  Be cautious and look after the tree.  One tree can be tapped continuously through one season (change the collection vessel regularly of course).

How to tap Birch Blood
(I used a cordless drill (thank you Herman!), part of an old but tidy metal olive oil spout, 1 meter of aquarium tubing from my local pet shop (cost 1€) or find it here on Amazon, used plastic baby milk bottles for sap collection and an old plastic tub to stop the baby bottle falling over).

  1. You must get the permission of the land owner first.
  2. The tree must have a trunk diameter of at least 25 cm and must be healthy and strong.
  3. Ask permission mentally or audibly of the tree itself.  If you are inclined as I am, then discretely make an offering of something precious to you and natural, to the roots of the tree.  You are taking some of it’s life force so be respectful, careful and only take what you need.
  4. Between 50cm and 1 meter up the trunk, drill a 1 inch deep hole through the bark, at a slight upward angle (about 30 degrees) with a very clean drill bit (about 6mm diameter bit).
  5. The sap will immediately or very soon start to flow out of the hole.
  6. Insert sterile, sturdy but flexible tubing (about 1 meter long), of the same diameter as the hole (this will be a little bigger than the bit size) into the hole.  Like me, you may like to insert a graduated metal tube into the hole to ensure a good seal and then fit flexible tubing over that short tube.
    N.B. Tubing and collection vessels can be sterilised in various ways; I choose to clean them well in slightly soapy water, then boil in clean water for about 10 minutes, then dry on a clean muslin or tea towel..
  7. Insert the flexible tubing into a sterile collection vessel such as a plastic drink bottle.
  8. Collect as much sap as required or possible in the time you have available.  If leaving the tapping unattended make sure to cover the collection vessel well (plastic bag and elastic band?) so that insects etc. won’t climb in.
  9. Seal the collection vessel and use the sap immediately or refrigerate or freeze.
  10. Carefully remove the tubing and or metal spout from the hole. See the following section about sealing or not sealing the wound.
  11. Clean your tubing, dry it and store for future use.

To seal or not to seal?
There are differing opinions about whether the hole should be plugged or not after tapping.  Some say the tree should be left with an open hole as it will seal it and heal itself best this way.  Recent research on Maples in Canada, suggests this is the best method.  Others warn against leaving the tree to literally bleed to death with an open wound.  Today we plugged the hole as best we could with a twig of the same diameter as the drilled hole.  It worked fairly well and stemmed most of the flow.  Beeswax is suggested by some as another way to seal the hole, I have not yet tried that.  Others suggest inserting a cork, I tried this before the twig today and it was ineffective; the cork had to be whittled to fit and then became too pliable and weak.

It felt better to seal the hole today, I didn’t like to leave all that beautiful sap running down the trunk, although as the weather is not too warm at present and any seepage from the wound runs down the trunk towards the roots, I can’t really imagine that the loss of sap would cause too many problems for a healthy tree.

An easier way to collect a little sap
Simply cut off the ends of some birch twigs or branches and point the cut ends into a bucket or ease them downwards into a bottle.  Sap will soon start to drip out of the cut ends.

Storing and using the sap
Birch sap should be consumed quickly and stored at refrigerator temperature.  The sap can apparently be frozen for some time.  Birch sap can be made into a delicious wine, be boiled down to make a syrup – rather like maple syrup and can be drunk fresh. I have also heard that some chefs like to make Birch vinegar from the sap.