Shrub Diseases

Botrytis is a fungal disease on flowers of shrubs, bulbs, and herbaceous perennials that can spread to the stem and cause girdling and dieback.

Ovulina petal blight begins as water soaked spots on petals and can cause flowers to completely collapse.

Scattered dying branches on rhododendron could be the common fungal botryosphaeria canker.

There are several species of lilacs that are grown in Maryland.

List and descriptions of common rose problems

Boxwood blight is a devastating disease of boxwood plants.

Foliage on rhododendron and related shrubs appear wilted and leaves roll inward.

List of azalea and rhododendron diseases, insect pests, and abiotic problems.

Diagnose, manage, and prevent common boxwood problems