Blackthorn
Prunus spinosa
Blackthorn is a dense, fiercely spiny deciduous shrub native across Europe, western Asia, and locally in northwest Africa, famous for its clouds of white blossom in early spring and its bitter sloe berries used to make sloe gin. In garden settings it is valued as an impenetrable wildlife hedge and early pollinator plant, but the honest catch is its aggressive root-suckering: given space it spreads into spreading thickets that are almost impossible to eradicate, and its long, needle-sharp thorns cause "blackthorn disease" — septic puncture wounds that can require medical attention — making it a plant to site with eyes open rather than as a casual garden shrub.
Climate fit: narrow (39/100)
Structure
Border
Pollinator
Edible
Light
Full sun / Part sun
Water
Moderate water
Mature size
96-196" tall · 144" apart
Hardy in zones
4a-8b
very cold to frosty winters
Native in Illinois
No
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A documented larval host for the Scarce swallowtail — caterpillars feed on its foliage before becoming the next generation.
Cold hardiness
These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✓
Well-suited today and still thriving in 2050.
Heat tolerance
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...
Where this plant fits
Suitable across 40 ecoregions — 35 climate-resilient through 2070 · 5 suited today. Best matches first.
Appalachian mixed mesophytic forests
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Appalachian-Blue Ridge forests
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Arizona Mountains forests
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Blue Mountains forests
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Canadian Aspen forests and parklands
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Central Pacific Northwest coastal forests
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Central Tallgrass prairie
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Central-Southern Cascades Forests
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Colorado Rockies forests
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Cross-Timbers savanna-woodland
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Similar plants
Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Aronia melanocarpa
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A drought-and-flood-tolerant native shrub of eastern North America with brilliant three-season interest — spring white-pink flowers, glossy black antioxidant-rich late-summer berries, and brilliant wine-red fall foliage — plus an extraordinarily wide cold-hardiness range (USDA 3a-8b). The berries are astringent fresh but the basis of a small but growing commercial industry (juices, wines, jams, supplements) for their exceptionally high anthocyanin content. Spreads by suckers; site where colony formation is welcome.
Chaenomeles speciosa
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Corylus americana
American hazelnut
A rounded, multi-stemmed deciduous shrub native across eastern and central North America, grown for its edible nuts and its season-opening catkins. Showy 2-3 inch yellowish-brown male catkins dangle from bare branches in early spring before the ovate, double-toothed leaves emerge; small egg-shaped edible nuts ripen inside leafy husks by mid- to late summer. Easygoing in average soil and tolerant of clay and black walnut, it suckers into thickets that screen and shelter wildlife.
Amelanchier canadensis
Canadian serviceberry
A small native tree with white spring flowers, edible summer berries, and copper to red fall color.
Akebia quinata
Chocolate vine
Chocolate vine is a vigorous, twining woody climber native to China, Japan, and Korea, producing clusters of spice-scented purple-maroon flowers in spring and large sausage-shaped fruits in autumn. It adapts readily to most well-drained soils in sun or part-shade and covers structures fast, making it a striking focal-point plant for walls, fences, and pergolas. The honest catch is its invasive potential: it smothers native shrubs and trees by blocking sunlight and is listed as invasive across much of the US East Coast and the Pacific Northwest, so it must not be planted where it can escape into natural areas, and annual hard pruning is essential to keep it under control.
Prunus virginiana
Chokecherry
A suckering, thicket-forming native cherry that reads as a large shrub or small tree across most of North America. Fragrant white flowers open in elongated drooping racemes in spring, followed by dense pendulous clusters of pea-sized cherries that ripen red to dark purple-black in late summer. The astringent fruit is technically edible after processing, and the plant is a workhorse for wildlife — feeding birds and mammals and hosting sphinx-moth larvae.
Educator packet
Plant packet
Blackthorn educator packet
Blackthorn is a dense, fiercely spiny deciduous shrub native across Europe, western Asia, and locally in northwest Africa, famous for its clouds of white blossom in early spring and its bitter sloe berries used to make sloe gin. In garden settings it is valued as an impenetrable wildlife hedge and early pollinator plant, but the honest catch is its aggressive root-suckering: given space it spreads into spreading thickets that are almost impossible to eradicate, and its long, needle-sharp thorns cause "blackthorn disease" — septic puncture wounds that can require medical attention — making it a plant to site with eyes open rather than as a casual garden shrub.
Scientific name
Prunus spinosa
Plant type
shrub
Hardiness
4a-8b
Light
full-sun, part-sun
Moisture
moderate
Spacing
144 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Blackthorn (Prunus spinosa). Retrieved 2026, June 30, from https://plotwright.com/plants/prunus-spinosa
Sources for every fact
Every fact on this page traces to a source. 18 fields cited - 18 source-backed.
RHS Find a Plant
Botanical research database
Backs 17 fields
Identity
Summary
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