Panicle hydrangeas ('Tardiva', 'PeeGee', 'Grandiflora') bloom on new wood. Prune for form now and in winter—remove oldest, tallest center stems to reduce trunk load. Unlike mopheads, winter pruning doesn't sacrifice next summer's blooms.
Hydrangea Varieties and Care: From Planting to Pruning and Drying Blooms
Hydrangea Pruning: Timing by Variety for Bigger, Better Blooms
Growing Hydrangeas: Complete Guide to Varieties, Care & Pruning
Pruning 'Limelight' Hydrangea for Stronger Stems
Why Your Hydrangea Blooms Are Green: Likely 'Annabelle' (H. arborescens)
Lantana Pruning: When and How to Cut Back for Winter Survival
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