In article , Roberto
writes
You need hard wood cuttings almost anytime I think, they are pretty easy to
propagate, a bit like blackcurrants. Stick it in the ground and it'll grow

What I've done in the past is stick softwood cuttings in water (or
compost) and let them root. I rather suspect the Forysthia cuttings can
be struck under varied circumstances.
--
Stewart Robert Hinsley