Pruning Hydrangea macrophylla (bigleaf hydrangea) 1. Identify the Bloom Type Hydrangea macrophylla blooms on Old wood (last season’s growth) 2 How to Prune Remove dead or weak stems: Cut at the base. • Shape the plant: Trim back long stems to maintain a rounded shape. • Rejuvenation pruning (for overgrown plants): Remove up to one-third of the oldest stems at the base to encourage fresh growth. Avoid heavy pruning on old-wood bloomers, or you may lose blooms for the next season. #gardening #gard