@Phil99T 
with TJoe on the process and I have been thinking of doing air layering especially on some that are currently blooming.
I have very few success in cuttings. Probably only 25% and mostly the thick cuttings, see below:
The sticks is a trick I learned from YouTube. The cuttings are just barely touching the dirt and the bamboo stick holds it in place and stable. (I still let the cuttings callous and had increased my success with this method). You can also use sand in rooting cuttings.
There is also a thread for cuttings propagation.
The thread "Adenium Propagation by cuttings" in
Adeniums forum
