hortguide
Guides
Plant SelectionPest & DiseaseSite AssessmentCultural PracticesAll Guides
Library
PlantsDiseasesPestsBeneficialsSoils
Weather Observations Field Brief
About
About HortGuideData & Methodology
Subscribe

⌘K to open  ·  ↑↓ to navigate  ·  Esc to close

Guides Plant SelectionPest & DiseaseSite AssessmentCultural Practices Library PlantsDiseasesPestsBeneficialsSoils Weather Observations Field Brief About Data & Methodology Subscribe to Field Brief

← Plants

Porlock Dogwood

Cornus porlock

Cornaceae · broadleaf evergreen tree · introduced

Last updated March 8, 2026

Data Coverage 2 of 6 dimensions
Site Data
Threats
Cultivars
Phenology
GDD Thresholds
Puget Sound

Quick Facts

Height
15–20 ft
Light
Full Sun to Part Shade
Hardiness
Zone Zones 6–7

Diseases (8)

Colletotrichum acutatum complex (C Anthracnose Armillaria ostoyae Armillaria Root Rot Various fungi (Phoma spp., Phomopsis spp., Cytospora spp.... Branch Canker Phytophthora cactorum Collar Rot abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch Symptom category — not a single disease Leaf Spot Podosphaera aphanis var. aphanis Powdery Mildew Symptom category — not a single disease Root Rot

Pests (7)

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 Leaf Scorch And Leaf Roll

Get the Field Brief

Seasonal scouting notes, timing updates, and the regional detail that national guides leave out. Delivered when it matters.

hortguide

Regional plant knowledge for Western Washington. Written by Chris Welch.

Guides

  • All Guides
  • Plant Profiles
  • Disease Guides
  • Pest Guides

Library

  • Plants
  • Diseases
  • Pests
  • Soils

More

  • Field Brief Newsletter
  • About

Pesticide recommendations are for reference only. Always read and follow the label.

© 2026 HortGuide · Chris Welch · All rights reserved.