From Birds and Blooms · Emily Hannemann · · 40s
Brown Spots on Hydrangea Leaves
Hydrangea leaf spots likely mean fungal infection or pest damage.
In brief
Hydrangea leaf spots likely mean fungal infection or pest damage. Brown spots on hydrangea leaves indicate fungal infection or pest damage requiring removal of infected leaves and fungicide application. Originally reported by Birds and Blooms.
Brown Spots on Hydrangea Leaves
Brown spots on hydrangea leaves suggest fungal infection.
“Hydrangeas are susceptible to several leaf spot diseases caused by different fungi.”
Fungus Causes Leaf Damage
Hydrangeas are susceptible to several leaf spot diseases caused by different fungi.
“Keep your plants healthy, avoid overhead watering and remove infected leaves at the end of the season to reduce the risk of infection next year.”
Pest Damage Signs
Mites and aphids cause leaf discoloration and curling with honeydew.
“Mites and aphids are pests of hydrangeas that also contribute to leaf damage.”
Treatment Options
Apply organic insecticidal soap or horticulture oil for pest control.
“If intervention is needed, start with a strong blast of water to dislodge some of the mites and aphids.”
The headline
Brown spots on hydrangea leaves indicate fungal infection or pest damage requiring removal of infected leaves and fungicide application.
