How to Propagate flax-leaved daphne?
Propagate by semi-hardwood cuttings in summer, or by grafting in winter

flax-leaved daphne · Daphne gnidium
This species needs excellent drainage, a sandy loam with a roughly neutral pH is ideal. May need winter protection. See daphne cultivation for more details
Propagate by semi-hardwood cuttings in summer, or by grafting in winter