Monday, 3 November 2025

B is for Blackthorn

It's been almost a year since I mentioned the Ogham Tree Alphabet on the blog .

This is what I wrote way back in 2020, when I found Karen Cater's book about it and started taking photos and writing about all the trees mentioned in the book.


The Ogham Alphabet is the only native British writing system devised over 2,000 years ago and carved using notches onto wood or stone.

I had heard of this way of writing from the Sister Fidelma Books by Peter Tremayne -the first few of these I read years ago before they became very repetitive.

It turns out that in the Ogham Alphabet each letter is also a tree and a number and part of the calendar or actually the other way round..........each tree is a letter and number and a month or day of the year.


Over the last 5 years I've written about most of the trees mentioned in the book but not the Blackthorn. I took the photo above way back in the late summer or early autumn, when I noticed how many sloes there were on a tree in a car park. It's been sitting in drafts waiting for after the Autumn equinox because the Blackthorn is the tree that rules the dark half of the year, giving the strength to survive the winter month.

 The tree represents the letter S and the number 14.


Blackthorn wood is dense and strong and the thorns can cause infection. The wood is used for the Irish Shillelagh a walking stick or cudgel. And it was said that if a witch pointed a stick of Blackthorn at a pregnant woman she would miscarry.
 Vast numbers of sloe stones have been found in ancient archaeological sites although now we find them far too sour to eat.
It is thought that the Crown of Thorns that Jesus was crucified with was made from blackthorn and a blackthorn winter is a spell of cold weather just as the blackthorn blossoms during the days of the Ice Saints.



This lovely illustration by Karen Cater shows the whole year of trees for the alphabet.




All the other posts about the Ogham Tree Alphabet are here if you want to look at them.

Back Tomorrow

24 comments:

  1. The Blackthorn gives blessings and a curse, I have had a serious infection from a thorn and am very careful around them now. We don't collect sloes any longer, the sloe gin was being wasted.
    Penny

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    1. I hacked down lots of Blackthorn at the smallholding before I knew about infections - luckily managed to avoid getting punctured

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  2. What fascinating information, The Blackthorn seems to be a very special tree. 💚

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  3. Sounds like tree to steer clear of.
    These special posts of yours are some of my favourite. How interesting that you’re starting the month with The Apple (which you talked about yesterday) covering the light half of the year and the Blackthorn (todays topic) covers the dark side

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    1. I'd not even realised that coincidence until you said! Totally unplanned

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  4. Thanks for the warning about thorns-I’m not a gin fan but know people like sloes to steep in gin. Beautiful illustrations. Catriona

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    1. Son went looking for sloes for gin and only found a handful - think they were early this year

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  5. The sloes look so enticing....

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    1. Goodness knows how they were eaten 1000's of years ago, their taste buds must have been different then

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  6. It's valuable to learn about the thorns of this tree. Fascinating book!

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  7. I've seen references to Blackthorn and to sloe gin without understanding the significance, so appreciate this! And the illustration of the alphabet is lovely.

    Constance

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    1. It's a very old way of making a liqueur from gin and fruit

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    1. I need some new pictures for headers really, that one is a year old!

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  9. I love the illustrations. Sloes were incredibly early this year, I've got our sloe gin tucked in the back of a cupboard doing its thing. It will be drunk from December onwards in tiny glasses.
    Alison in Devon x

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    1. I've been enjoying the book for so many years now it's been useful for the blog!

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  10. Is the Blackthorn tree protected? It has a long history.
    A tree with poisonous thorns is to be handled with great caution.
    The alphabet diagram/illustration is brilliant.

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  11. I still remember getting a blackthorn thorn in a finger when much younger, it took literally months to heal. I have a walking stick which one of my patients made for me…it is out of blackthorn..I see I need to be very careful if and when I use it!

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    1. The thorns are very nasty. You should be OK with a stick as long as it's thornless

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  12. I always understood a Blackthorn Winter to be a period of late frosts, just as the blossom was emerging?

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    1. I wonder why I put 'warm' when I should have put 'cold' - wishful thinking! I'll change it! Thankyou for making me re read

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