The How To Prune Hydrangeas is based on whether it is a young type hydrangea or an old type hydrangea.
1. Old-wood
2. New-wood
3. Timing
4. Varietal
5. Method
How To Prune Hydrangeas (https://yourhomify.com/how-to-prune-hydrangeas/) also goes a long way in pointing out that unnecessary years of death of flowers are not lost accidentally, season after season.