How to Propagate Hydrangea macrophylla 'Gerda Steiniger'?
Propagate by softwood cuttings in early summer or hardwood cuttings in winter

Hydrangea macrophylla 'Gerda Steiniger' · Hydrangea macrophylla 'Gerda Steiniger'
Grow in any moist but well-drained soil in partial shade or grow in sun if soil remains reliably moist. See shrubby hydrangea cultivation for further advice
Propagate by softwood cuttings in early summer or hardwood cuttings in winter