Landscape and Nursery - Plants that are Susceptible to Powdery Mildew

Some Ornamental Plants that are Susceptible to Powdery Mildew are shown below.

Scientific Name/Common Name
Plants listed in boldface are most commonly affected by powdery mildew.

Begonia sp. Begonia
Cotinus coggygria Smoke-tree
Cotoneaster sp. Cotoneaster
Crataegus sp. Hawthorne
Eucalyptus sp. Eucalyptus
Euonymus sp. Euonymus
Hydrangea sp. Hydrangea snowball
Lagerstroemia indica Crape myrtle
Leucothoe sp. Leucothoe
Ligustrum vulgare Privet
Lonicera sp. Honeysuckle
Magnolia sp. Magnolia
Malus sp. Apple, Crabapple
Phlox paniculata Phlox
Photinia serrulata Chinese photinia
Platanus sp. Sycamore
Prunus sp. Peach, Plum, Apricot
Pyracantha sp. Pyracantha
Pyrus sp. Pear
Quercus sp. Oak
Rhododendron sp. Rhododendron, Azalea
Rosa sp. Rose
Salix sp. Willow
Spiraea sp. Spiraea
Syringa vulgaris Lilac
Vaccinium sp. Blueberry
Viburnum sp. Viburnum, Snowball
Wisteria sp. Wisteria
Zinnia elegans Zinnia

Information from North Carolina State University Plant Pathology Extension