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Celtic Tree Calendar · Month 10 of 13

Vine, the month of the letter Muin

Vine is the tenth of Graves' tree months, 2 September to 29 September, led by the Ogham letter Muin, M. The medieval gloss vine is doubtful, since the grapevine is not native to Ireland and the name muin means neck, wile or love.

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The Ogham letter Muin drawn upright on a stemline, one stroke across the stemline at a slant, read from the bottom up; beside it the words Muin, the Vine month, letter M, and the dates 2 September to 29 September. Muin The Vine month · letter M 2 Sep to 29 Sep Old Irish muin A doubtful gloss Read from the bottom up
Muin, the letter M, as it is cut on the stones: one stroke across the stemline at a slant, read upwards. Drawn by us from its Unicode code point, not from a font.

Facts

Tree month
2 September to 29 September (Graves, 1948)
Days
28
Ogham letter
Muin, the letter M (U+168B, OGHAM LETTER MUIN)
Old Irish name
muin
The name means
neck, wile or love; the kennings play on all three
Letter and tree
Doubtful: the tree is not native to Ireland and the name means something else
Kenning (Morann)
tressam fedma, "strongest of effort" (tr. Calder 1917, p. 279)
Medieval tree gloss
vine (fínemain), a plant not native to Ireland (Auraicept, Calder 1917, p. 93)
The tree in Modern Irish
fíniúin

Meaning

Vine is the most foreign tree in the calendar: the grapevine is not native to Ireland, and the medieval link between the letter Muin and the vine is doubtful. The kenning of Morann is "strongest of effort", in Calder's translation, and the Auraicept's explanation praises the vine for growing aloft: "Highest of beauty is muin, that is, because it grows aloft, that is, a vine-tree". Graves' Vine month holds most of September, the time of the grape harvest elsewhere.

Our reading takes discernment and patient effort from this: people born in this month are read as refined and appreciative, weighing things before they commit. The reading is ours.

The letter

Muin is the first letter of the third group: one stroke across the stemline at a slant. Its Old Irish name muin means neck, wile or love, and the medieval kennings play on all three meanings. Both tracts gloss it as vine, fínemain, and so does O'Flaherty; ogham scholars treat the gloss as doubtful.

A tree from elsewhere

There is no Irish vine lore to tell. The medieval scholars knew the vine from books and from wine, not from Irish woods, which is part of why their gloss is doubted. We keep Graves' name for the month and say so.

In Graves' year

Vine runs from 2 to 29 September, the same in every list. The gemstone that tree-sign websites give it is modern, and our own old table gave it the hazel's stone by a row slip; the planets, animals and titles are modern too, and none is used here.

Correspondences

Each item with how it stands: “sourced” is in the work cited, “our construction” is EsoTerrier’s own, and “disputed” means the sources disagree.

The Auraicept's explanation
"Highest of beauty is muin, that is, because it grows aloft, that is, a vine-tree" (Calder 1917, p. 93) sourced
The Ogam Tract's gloss
the same tree (Calder 1917, p. 277) sourced
O'Flaherty's gloss (1685)
Muin, commonly Fineamhuin, the vine tree sourced
How the letter is tied to the tree
Doubtful: the tree is not native to Ireland and the name means something else disputed
Colour and bird words for the letter (a medieval curiosity)
Colour: mbracht, "variegated"; bird: mintan, "titmouse". Words that begin with the letter, like the tract's lists of churches; not the tree's colour or animal sourced
Our reading
The most foreign tree of the calendar: refined and appreciative, weighing things before committing. our construction

How the schools read it

The medieval tracts
The kenning "strongest of effort"; the Auraicept glosses the letter vine (fínemain).
O'Flaherty, 1685
Muin, commonly Fineamhuin, the vine tree.
Graves, 1948
The tenth month, 2 September to 29 September.
Ogham scholarship
muin means neck, wile or love; the vine is a doubtful gloss.
Tree-sign websites
The same dates; a planet, gemstone, animal and personality title, all modern. Not used here.
EsoTerrier
The most foreign tree of the calendar: refined and appreciative, weighing things before committing.

Claims about it

  • The vine was a tree of the Irish Ogham tradition.

    disputed

    What the record shows: The grapevine is not native to Ireland, and the name muin means neck, wile or love. The medieval gloss is doubtful.

  • The vine's gemstone is amethyst.

    false

    What the record shows: A row slip in our own engine before October 2026: the hazel's stone moved down a line. All gemstones were dropped.

  • The Vine month belongs to an old Celtic calendar that the Druids kept.

    false

    What the record shows: No ancient or medieval source has a tree calendar or a tree for each birthday. The thirteen months are Robert Graves', set out in 1948.

  • The Vine month has a traditional personality title.

    false

    What the record shows: The thirteen titles come from one website of the 2000s and were copied widely; nothing in Graves, Paterson or the medieval tracts supports them. We never use them.

Elsewhere on EsoTerrier

Sources

Primary texts (4)
  1. George Calder (ed. and tr.), Auraicept na n-Éces: The Scholars' Primer, with In Lebor Ogaim (the Ogam Tract). Edinburgh: John Grant, 1917. Quoted with page. archive.org/details/auraicept00calduoft
  2. Roderick O'Flaherty, Ogygia. London, 1685; English by James Hely, Dublin, 1793. archive.org/details/ogygiaorachrono00helygoog
  3. Robert Graves, The White Goddess. London: Faber and Faber, 1948 (revised 1952 and 1961). Facts only; not quoted.
  4. The Unicode Standard, Ogham block U+1680 to U+169F (encoded in Unicode 3.0, 1999). unicode.org/charts/PDF/U1680.pdf
Studies and other sources (9)
  1. Damian McManus, "Irish letter-names and their kennings", Ériu 39 (1988), pp. 127 to 168. jstor.org/stable/30024135
  2. Deborah Hayden and David Stifter, "Ogam and Trees", OG(H)AM project, 20 December 2022. ogham.glasgow.ac.uk/index.php/2022/12/20/ogam-and-trees
  3. "Ogham", Wikipedia (orientation only). en.wikipedia.org/wiki/Ogham
  4. "Bríatharogam", Wikipedia (orientation only). en.wikipedia.org/wiki/Br%C3%ADatharogam
  5. Mary Jones, "Celtic Tree Calendar", Jones's Celtic Encyclopedia (2004). maryjones.us/jce/celtictreecalendar.html
  6. Helena Paterson, The Celtic Lunar Zodiac. London: Rider, 1992 (known from catalogue records and Penczak). search.worldcat.org/oclc/31606966
  7. whats-your-sign.com, "Celtic Tree Astrology", Wayback Machine capture of 28 February 2008 (cited only as the source of the claim). web.archive.org/web/20080228140902/http://www.whats-your-sign.com/celtic-tree-astrology.html
  8. Icy Sedgwick, "Celtic Tree Astrology" (2018), a composite gemstone and animal list (cited only as the source of the claim).
  9. Foras na Gaeilge, focloir.ie and teanglann.ie (Modern Irish forms). focloir.ie
Our own research (2)
  1. EsoTerrier, Celtic Tree research and validation, 11 to 13 October 2026.
  2. EsoTerrier calculation engine, the Celtic Tree Calendar service, its texts and its documentation.

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