Answer: It sounds as though your hydrangea is suffering from stress. Hydrangeas really prefer a partial shade or morning sun situation in evenly moist soil well-enriched with organic matter. (A rule of thumb is about an inch of water a week from either the sky or the gardener, and it is best applied as a deep soaking rather than frequent light sprinklings.) They also appreciate a mulch.
It is possible that your shrub is receiving either too much sun or too little water or a combination of both. Newly planted shrubs are particularly prone to this type of stress because they have not yet developed a full root system. Good luck with your hydrangea.
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