Answer: Hydrangea's are normally problem-free, so I suspect that the troubled plant is suffering from some cultural problem. It sometimes takes a full year for new plants to settle down and become established. Brown spots on leaves can be the result of water droplets being intensified by the sun and burning the tender leaf tissue. Black spots can indicate a bacterial or fungal disease and yellowish-orange spots can indicate rust disease. If only a few leaves are affected, pick them off. If the whole plant is affected, try not to allow water to splash from the leaves onto other, healthy plants.
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