Propagating Adenium by grafting is pretty easy you just need to take a few things into consideration. Make sure your tools are clean and sharp to make the best cutting. (In case that your skin is too sensitive, you may wear protective gloves and glasses when working to avoid the sap of Adenium are considered toxic.)
Select a perfect branch from Adenium mother plant that have good form, age 9-12 months, length 4-5 cms. With a bud which is smaller that the rootstock.
Select a rootstock that have thick stems, bigger than a scion and healthy.
Cut rootstock stem like " V " shape about 1.5- 2 cm . depth by using sharp and sterile knife.
Cut scion into wedge carefully and insert into rootstock, matching cambium at edge or central vascular bundle preferably both sides.
Tie with small plastic tape and cover it by using small plastic bag to protect water. (or using elastic waterproof band instead)
Keep in humid location, indoor, away from kids and pets.
If it looks really well formed, then remove the tape and plastic bag out.