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Low toxicity🍽️ Edible💊 Medicinal

🫐 Blackthorn (sloe)

Prunus spinosa · Rosaceae

🌳 Temperate Europe🫒 Mediterranean🏔️ Mountains
🧠 To remember it“Sloe before the frost, your mouth gets lost; sloe after the frost, a sweet treat at no cost” — cold transforms astringency into sweetness.
Blackthorn (sloe) — Prunus spinosa

🔍 Identify it without mistakes

Very spiny shrub with gnarled blackish branches bearing stout thorns at the tips of the shoots. Early and spectacular flowering: a blanket of small white flowers completely covers the still-bare branches before the leaves appear, starting in March. Fruit (sloe) small, round, blue-black with a waxy bloom, very astringent before the first frosts.

  1. gnarled blackish branches with stout thorns at the tips of the shoots
  2. early and dense white flowering, before the leaves (starting in March)
  3. small, oval, finely toothed leaves appearing after the flowers
  4. small waxy blue-black sloe (1-1.5 cm)
  5. very astringent taste before full maturity/frost
Size1-4 m
FloweringMarch-April (before the leaves)
Habitathedgerows, woodland edges, wasteland, embankments, thickets in plains and mid-mountains

⚠️ Not to be confused with

Wild cherry or escaped cultivated plum (Prunus avium / Prunus domestica)none (edible as well)

To tell them apart: blackthorn is distinguished by its shrubby size, its numerous stout thorns, and its small blue-black fruits, whereas the wild cherry is a large thornless tree with larger red/black fruits

🍽️ Eating it

Partssloes (fruits, after frost), flowers
SeasonOctober-December, ideally after the first frosts
Tastevery astringent before frost, tart-sweet after frost

Preparation : raw sloes are inedible before frost (extremely astringent, tannins); after one or more frosts, the flesh softens and can be used for jam, liqueur (the famous English sloe gin), or fruit leather; flowers are edible raw in small quantities

💊 Healing with it

flowers traditionally used as a mild laxative and spring blood purifier; astringent fruit traditionally used against mild diarrhea

Level of evidence : traditional use — ethnobotanical compilations (Fournier, PFAF)

⚠️ the kernels contained in the pit, as in most Prunus species, contain cyanogenic glycosides and should never be consumed in quantity; the fruit pulp is safe

🪓 Other bushcraft uses

  • very hard wood used to make walking sticks and canes (the famous Irish shillelagh)
  • long, rigid thorns empirically used as makeshift needles or spikes
  • traditional living defensive hedges thanks to its dense thorns
Sources (3)

No entry replaces a certain identification in the field, or medical advice. When in doubt: don't eat it. If ingestion is suspected: poison control or 112/911.