I have been mentioning in a few posts about the plant propagation course I took over the last 10 months. Here is a little more explanation of propagation by cuttings, but I am certain you can find better advice elsewhere on the internet.
From what I recall, this is how it works. You’ll need a rooting hormone, which you can purchase in powder form, but in this case I used chopped up willow leaves that I soaked overnight.
Cut the stem to three nodes and cut half off of the top leaves. This is griselinia, a NZ native tree aka kapuka in te reo. Scrape one side of the bottom of the cutting to expose the cambium.
I soaked these semi-hardwood cuttings in the willow water for half an hour before putting them into the propagation mix.
Then they go into the propagation unit, which holds in warmth and humidity. Behind the griselinia is buxus.
The unit has two misting units set on a timer.
After a few months the cuttings have put out roots.
I used my very fancy potting bench/duck house to prick them out and pot them up.
Then back in the unit for some more time to grow in a sheltered environment.