How to prune these hydrangeas and general care?

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Help! New hydrangea gardner here ... we live in the NC area Zone 7 I believe. these had been planted on the East/South side and was a bad placement so just moved them to the North side and they are improving. Good new growth. How do I prune these as no idea to type of hydrangea. Don't know if old wood/new wood etc. Also with the black spots on it had tried Neem in past. Am I better off just cutting them to the ground and start fresh next year? thanks

q how to prune these hydrangeas and general care
q how to prune these hydrangeas and general care
q how to prune these hydrangeas and general care
  13 answers