Photo: Unknown — CC BY-SA 3.0 · source
Survives zone 4 through 8
Harvest calendar
Best planted in early spring after your last frost, or in fall before the ground freezes, depending on your climate.
⚠ The sloe is intensely astringent and essentially inedible raw off the bush, but once the first frosts soften its tannins it is traditionally used to make sloe gin, jellies, and preserves — kernels are cyanogenic like other Prunus stones.
Spread warning. Locally naturalized outside its native range in parts of eastern North America (New England, Pacific Northwest) and Tasmania, though not documented as a major ecological threat in those areas.
- Hardiness
- Zone 4–8
- Habit
- Shrub
- Edible part
- Fruit
- Ripens
- After first frost (Oct–Nov)
- Mature size
- Suckering thorny shrub 2–5 m, thicket-forming — the classic hedging blackthorn
- Light
- Full sun to partial (hedgerow) — reduced sloe crop in shade
- Soil pH
- 6.0–7.0 (near-neutral)
- Environment
- Temperate
- Native range
- Native to Europe, western Asia, and parts of northwest Africa.
- Status
- Both wild and cultivated
- Years to fruit
- 3–4 yrs
- Growth speed
- Moderate — roughly 30–45 cm/year
- Spacing
- 300 cm (118 in) apart — about 9 m² (97 sq ft) per plant
- Leaf shape
- Small oval to obovate leaves 2–4.5 cm long with finely toothed margins, dull dark green.
- Root system
- Shallow-rooted with vigorous, spreading lateral roots that readily produce suckers.
- Fruit description
- Small globose drupe (the sloe), 10–12 mm across, black with a distinctive waxy blue-purple bloom, with thin flesh tightly adherent to the stone.
- Propagation
- Seed has deep dormancy and needs 2–3 months (sometimes up to 18 months) of cold stratification; more reliably propagated by separating root suckers, layering, or half-ripe cuttings taken in midsummer.
- Pollination
- Self-fertile
The edible parts listed above are a starting point, not a field guide. Identify a plant with certainty — ideally against a local authority — before eating any part of it, and read the full disclaimer. Spotted something wrong? Report it.
Growing guide
Fertilizing. Tolerant of poor soils and thrives on chalk or limestone; excessive lime can cause chlorosis, and little supplemental feeding is needed beyond that.
How it spreads. Strongly suckering — spreads via shallow lateral roots to form dense, thorny thickets, a habit historically exploited for stock-proof hedging.
Growing tips. Very shallow-rooted and tolerant of poor, dry, and calcareous soils, so it is often used for wildlife hedging. Flowers very early, often before the leaves emerge, so blossom can be damaged by late frost, though heavy fruit set usually still follows.
Grow journal
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