https://extension.umd.edu/resource/pruning-hydrangeas
Pruning Hydrangeas | University of Maryland Extension
The timing of hydrangea pruning depends on which type is grown. Pruning at the correct time ensures optimum flowering and can rejuvenate overgrown plants.
university of marylandpruning hydrangeasextension
https://www.umass.edu/agriculture-food-environment/home-lawn-garden/fact-sheets/growing-tips-hydrangeas-pruning-for-blooms
Growing Tips: Hydrangeas, Pruning for Blooms : Home Lawn & Garden : Center for Agriculture, Food,...
Six hydrangea types most commonly grace our landscape. In eastern and southeastern Massachusetts, bigleaf hydrangeas (Hydrangea macrophylla), and their many...
growing tips