List of hydrangea diseases

This article is a list of diseases of hydrangeas (Hydrangea macrophylla).

Bacterial diseases
Bacterial blight	Pseudomonas solanacearum
Bacterial leaf spot	Pseudomonas cichorii

Fungal diseases
Bud and flower	Cercospora hydrangeae Corynespora cassiicola Phyllosticta hydrangeae Septoria hydrangeae
Powdery mildew	Erysiphe polygoni
Root rot	Pythium spp.
Rust	Pucciniastrum hydrangeae
Southern blight	Sclerotium rolfsii Athelia rolfsii [teleomorph]

Bacterial diseases