Turkish Hazel
Corylus colurna
Betulaceae · broadleaf deciduous tree · introduced
Last updated
Plant Profile
Size & Form
Height
35-50 ft
Spread
23 ft
Growth Rate
Medium
Site Requirements
Light
Sun to Part Shade
Soil Drainage
Moist
Soil pH
4.5-8.5
Water
Moderate
Drought Tolerance
Moderate to high
Hardiness
Zones 4a–8b
Ornamental Interest
Bloom Time
March
Fall Color
Yellow
Origin
southeast Europe and western Asia
Watch for this season
Powdery MildewHigh
Active Conidial Spread
Wood DecayHigh
Wound Infection Window
Armillaria Root RotModerate
Active Below-ground Growth
Sooty MoldModerate
Heavy Mold Colonization
Diseases: Regionally Documented (19)
Armillaria spp. — primarily A Armillaria Root Rot Pseudomonas syringae pv. syringae Bacterial Blight [VERIFY] Blanks Cryptosporella umbrina Brown Stain Symptom category — not a single disease Canker Catkin Blast Candidatus Phytoplasma pyri Decline/Collapse Syndrome Anisogramma anomala Eastern Filbert Blight Fungal agents (multiple) Kernel Molds Symptom category — not a single disease Leaf Spot Apple mosaic virus (ApMV) Mosaic Mosses and Lichens Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Fumago vagans Sooty Mold Daffodil yellow stripe virus (DYVV) Stunt (Dilly) Sunburn Wet Feet Taphrina wiesneri Witches' Broom Multiple Basidiomycete fungi cause wood decay in trees Wood Decay
Data Maturity Baseline Extension data. Expert review underway.