How to Propagate kousa 'Blue Shadow'?
Propagate by semi-hardwood or hardwood cuttings or grafting

kousa 'Blue Shadow' · Cornus kousa 'Blue Shadow'
Grow in fertile, humus-rich, well-drained, neutral to acid soil in sun or light shade. For more advice, see flowering dogwood cultivation
Propagate by semi-hardwood or hardwood cuttings or grafting