What pests bother hydrangeas?
The two most common pests attacking hydrangeas are spider mites and aphids. Reams of information is available on the web about these pests. Good culture in the garden will do a lot to avoid heavy infestation, but pesticides are available for control as well should you choose. We are cautious about using them since most are not selective about the insect they kill and can disrupt the complex life cycle of beneficial insects.