How to Prune serrate-leaved hydrangea?
Routine pruning is unnecessary; shorten overlong shoots to fit the available space. Prune after flowering has finished.

serrate-leaved hydrangea · Hydrangea serratifolia
Best grown in partial shade in a moist but well-drained soil enriched with well-rotted organic matter
Routine pruning is unnecessary; shorten overlong shoots to fit the available space. Prune after flowering has finished.