WSU Extension


Failure to bloom 
Fungal leaf spots 
Hail damage 
Herbicide damage 
Leaf scorch 
Marginal leaf necrosis 
Powdery mildew 

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Caption: hail damage to hydrangea leaf
Photo by: J.R. Glass
Hydrangea : Hail damage
(revision date: 4/23/2014)

Damage to plants depends on size of the hailstones and intensity of the storm. Minor damage may not show immediately, but may appear days or weeks later as small whitish scars or spots on the leaves. More severe damage may show immediately after the storm as tears or irregular holes, or shredded leaves and flower clusters. Leaves may be torn completely off the plants. Unlike leaf spots caused by disease or insect damage, hail scars do not continue to enlarge or spread once the initial damage is done.
Management Options

Non-Chemical Management
  • Hail damage is typically only an aesthetic concern. Unless plants are completely defoliated, it has little impact on plant health.
  • Hydrangeas prefer some afternoon shade and planting near sheltering trees may help reduce both hail and sun damage.
Select non-chemical management options as your first choice!

Chemical Management

None recommended


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Caption: hail damage to hydrangea leaf
Photo by: J.R. Glass