Porlock Dogwood

Cornus porlock

Cornaceae · broadleaf evergreen tree · introduced

Last updated May 10, 2026

Quick Facts

Height

15–20 ft

Light

Full Sun to Part Shade

Hardiness

Zone Zones 6–7

Anthracnose (Shade Trees)High

Primary Spore Release

Oystershell scaleHigh

Crawler Emergence

Armillaria Root RotModerate

Active Below-ground Growth

Powdery MildewModerate

Spring Emergence / Primary Infection

+ 2 more — see full disease and pest lists below

Diseases: Regionally Documented (7)

Discula destructiva (dogwood), Kabatiella and Discula spp... Anthracnose Armillaria spp. — primarily A Armillaria Root Rot Symptom category — not a single disease Branch Canker Collar Rot Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Symptom category — not a single disease Root Rot Sphaerulina azaleae (formerly Septoria azaleae) Leaf Scorch And Leaf Roll

Pests: Regionally Documented (6)

Coccus hesperidum Brown soft scale Macremphytus tarsatus Dogwood sawfly Chrysomelidae: Alticini Flea beetle Parthenolecanium spp. Lecanium scale Lepidosaphes ulmi Oystershell scale Edwardsiana rosae Rose leafhopper

Data Maturity

Structured Multiple sources. Expert review underway.