Adeniums are not your fast growing plants unless you are in the proper growing zone where you can expect noticeable caudex and branch growth over a couple month period. when using bonsai techniques on your desert rose plant (adenium) you need to take extra care to prevent branch breakage and wrapping wire too tight around the trunk and branches. If you bonsai wire wrap the branches too tight without allowing for adenium plant growth you will get indentations on the trunks.
Adenium can be bonsai into canopy type plants over the years. the image on this post is an example of a 8 year old bonsai adenium desert rose plant with a canopy (expanded top) growing style. Yes, it took time and extermination with wire wrapping methods to produce this result. However, it was worth the effort in learning how to bonsai adeniums in a different style than wind swept type you see all the time. The adenium bonsai has a caudex width of 10″ and dept of 8″. The canopy of the bonsai is 23″ round. Notice most of the left growth is towards the end of the branches. This is normal with an adenium bonsai. Now I plant to work on adding branches more evenly on the canopy. It will take a couple years to achieve this on this adenium desert rose plant bonsai.