Pests & Diseases for “Hydrangea”

University of Connecticut - Hydrangea: Diseases and Pests

Washington State University - WSU CAHNRS & WSU Extension Hortsense

University of California Agriculture & Natrual Resources - Managing Pests in Gardens: Trees and Shrubs: Hydrangea—UC IPM

University of Kentucky - Common Insect Pests of Hydrangea

Clemson University - Hydrangea | Home & Garden Information Center

Penn State - Hydrangea Diseases