shrub

Hazel

Corylus avellana

Updated 4 Aug 2026 · AI-parsed entry

Hazel (Corylus avellana) — a shrub, for Full sun, Medium water. Companions: European Beech.

What it needs & gives back

↓ Needs

Lightfull sun to partial shade
Watermedium

↑ Gives back

Mulch_biomasshigh
Pollenabundant
Fruitedible

Companions

Through the year

Through the year

JFMAMJJASOND
emergenceBud break and leaf emergence typically occur after the last spring frost and when air temperatures consistently rise above 5°C.
floweringFlowering occurs in late winter to early spring, often in February, after sufficient chill hours have been met.
fruitingNuts begin to form and mature approximately 150 days after flowering.
harvestNuts are typically ready for harvest from late August through September as they ripen and fall from the tree.
senescenceLeaves begin to change color and drop with the first autumn frosts and shortening day lengths.
dormancyThe plant enters dormancy after leaf senescence, triggered by the first autumn frosts, and remains dormant through winter.

Soil interactions

Drainagewell-drained
Nitrogen fixingNo
MycorrhizalYes
Accumulatespotassium, calcium, magnesium
Soil textureloam, sandy_loam, clay_loam
Organic matterHigh
Compaction toleranceMedium

Propagation

Methodsseed, cuttings, layering, division
Difficulty2 / 5
Establishes in~2 yr
Stratificationrequires cold stratification for 3-4 months
Self-seedingModerate
Divisionlate winter to early spring

Wildlife & pests

Attractsbees, squirrels, birds
Can host pestsnut weevil, aphids
Can host diseaseseastern filbert blight