Answer: Most hydrangeas bloom on the previous season's wood, so it may be that the winter weather or poorly timed pruning has killed back or removed the flower buds -- or the fungal infection has damaged them. I would suggest you take a sample to your Cornell extension for an identification of the problem and suggested treatment. Meanwhile, make sure you are not pruning your shrubs except right after the bloom season. A good fertilizer would be a complete, all purpose granular type such as 10-10-10 applied in early spring and again in late spring according to the label instructions. A top dressing of compost and several inches of mulch to help keep the soil cool and moist would also be a good idea. Keeping the plants in active growth by providing a moist soil during the growing season is also helpful.
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