Fast Reference Chart and Final Takeaways
Quick Hydrangea Pruning Chart
| Hydrangea type | Blooms on | Best pruning time | How much to prune |
|---|---|---|---|
| Bigleaf (Hydrangea macrophylla) | Old wood | Right after flowering | Light shaping, deadheading, remove a few old stems |
| Reblooming bigleaf | Old and new wood | Light cleanup in spring, light trim after bloom | Very light pruning |
| Mountain (Hydrangea serrata) | Usually old wood or both | Right after flowering; dead wood in spring | Light pruning only |
| Panicle (Hydrangea paniculata) | New wood | Late winter to early spring | Moderate to hard, depending on size goals |
| Smooth (Hydrangea arborescens) | New wood | Late winter to early spring | Moderate to hard, but leave some framework for support |
| Oakleaf (Hydrangea quercifolia) | Old wood | Right after flowering | Minimal pruning |
| Climbing (Hydrangea petiolaris) | Mostly old wood on mature growth | After flowering | Light size control |
The One Rule I Want You to Remember
If your hydrangea blooms on old wood, prune it after flowering. If it blooms on new wood, prune it in late winter or early spring.
That one distinction clears up most of the confusion around when to prune hydrangeas.
My Honest Final Advice
When in doubt, prune less. Hydrangeas usually recover better from a little neglect than from an enthusiastic over-trim.
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