shrub

Blackthorn sloe

Prunus spinosa

Updated 8 Jul 2026 · AI-parsed entry

Blackthorn sloe (Prunus spinosa) — a shrub, for Full sun, Medium water.

What it needs & gives back

↓ Needs

Sunlightfull sun to partial shade
Watermedium

↑ Gives back

Biomassmedium
Nectarfor pollinators
Pollenfor pollinators
Fruitedible sloe berries

Through the year

Flowering

Flowers early in spring after chill fulfillment and rising temperatures.

Fruiting

Fruits develop after flowering, typically ripening in late summer to early autumn.

Harvest

Sloes are traditionally harvested after the first autumn frost, which softens them and reduces astringency.

Senescence

Leaves senesce and drop after the first autumn frost.

Dormancy

Enters dormancy after leaf drop, requiring a period of cold for chill fulfillment.

Timing is relative to your local season (temperate Northern Hemisphere).

Soil interactions

Drainagewell-drained to moist
Nitrogen fixingNo
MycorrhizalYes
Accumulatespotassium, calcium
Soil textureloam, clay, sandy_loam
Organic matterMedium
Compaction toleranceHigh

Propagation

Methodsseed, cuttings, suckers
Difficulty2 / 5
Establishes in~2 yr
Stratificationcold stratification required
Self-seedingModerate
Divisionautumn

Wildlife & pests

Attractsbees, butterflies, birds, small mammals
Can host pestsblackthorn aphid, caterpillars of various moths
Can host diseasessilver leaf disease, bacterial canker