How to Propagate green osier?
Propagate by hardwood cuttings, grafting, seed.

green osier · Cornus alternifolia
Also known as: pagoda dogwood
Favours a woodland situation, but also full sun. Grow in fertile, humus rich, moist, acid soil which does not dry out. For more advice, see flowering dogwood cultivation
Propagate by hardwood cuttings, grafting, seed.