Gardening expert's verdict on if you should really prune hydrangeas during winter
Pruning hydrangeas in winter depends on the variety. Gardening experts generally advise against heavy winter pruning, as it can remove buds that produce blooms in spring.
Bigleaf (Hydrangea macrophylla) & Oakleaf (H. quercifolia) – Do not prune in winter.
These varieties bloom on old wood, and cutting them back will reduce flowers for the next season. Trim only after flowering in summer.
These bloom on new wood, so cutting them back in late winter or early spring encourages healthy growth and abundant blooms.
Climbing Hydrangeas (H. petiolaris) – Light pruning in winter is okay, but major shaping is best done after flowering.
Experts recommend pruning hydrangeas based on their bloom type rather than a general rule. If unsure, a light cleanup of dead branches in late winter is safest.