Blackthorn
Prunus spinosa
A tough, thorny pioneer hedge shrub that shelters wildlife, blocks wind and stock, and hands you sloes each autumn — just keep its suckering spread in check.
Blackthorn in a syntropic line
Blackthorn belongs in the Shrub layer as a Secondary species. Support species, fruit, and nitrogen fixers under the canopy. Rough in-row spacing starts around 1.7 m in a syntropic row. Good line partners include Apple, Black alder. As a Secondary species it carries mid-term yield and structure while climax trees slowly claim the canopy.
Tolerances and growing conditions
- Strata
- Shrub
- Lifecycle
- Secondary
- Soil preference
- Loam, Clay
- Soil pH range
- 5.5 – 8
- Min. temperature
- -30°C
- Min. rainfall
- 450 mm/year
- Wind tolerance
- High
- Frost tolerance
- High
- Growth rate
- Medium
- Irrigation needed
- Low
- Foliage
- Deciduous
- Waterlogging tolerance
- Medium
- Origin
- Europe
- Native to Portugal
- Yes
How to manage it
Lay or coppice as a stock-proof hedge; harvest sloes after first frost softens them.
How to propagate
Take hardwood cuttings in winter, or dig root cuttings — both establish readily.
Guidance, not a guarantee — success varies by species and skill.
What to watch out for
Vicious thorns can cause festering wounds; suckers aggressively and can overrun hedgerows and field edges if not contained.
Frequently asked questions about Blackthorn
Is blackthorn frost-hardy?
Yes for winter cold in many climates — generally hardy to around -30°C when dormant, with high frost tolerance in the catalog. Flowering crops can still lose a season to late frost, so site them carefully.
What soil does blackthorn need?
It does best on loam, clay ground, at pH about 5.5–8.
How much water does blackthorn need?
Plan for a rainfall floor around 450 mm/year, plus low irrigation once established.
Can blackthorn handle wet or waterlogged soil?
It has medium waterlogging tolerance — short winter wet is usually fine, standing water is not.
What should I watch out for with blackthorn?
Vicious thorns can cause festering wounds; suckers aggressively and can overrun hedgerows and field edges if not contained.
Design your line to see how your land fits Blackthorn.
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