The proper way of repotting the adenium was hardly taught by any nurseries that you visited. I was back to my nursery in Johor two weeks ago I took couple of shots of our adenium seedlings to show to all of you the proper way of planting adenium. If you use the "right" mixture of soil, the adenium will grow healthily and sturdy. Of course, this may not be the proper formula because there are many ways of planting the adenium. In Thailand, Indonesia and Taiwan, each country's nursery owner has their own way or formula of planting the adenium but what I am showing you here are some simple steps.Do click on the left image for a larger view. All these 5 ingredients have the same ratio but it depends on how loose the soil that you want it to be. On the bottom right is the preparation for repotting. First put in at least 70% of coconut chips/chunks to the bottom of the pot. Then add some soil mixtures which was shown and only then place the plant above the soil and start to add in the rest of the soil mixtures to make it stand.
On the right image you will see the followings:
Step 1: add coconut chunks/chips into the pot and fill up to 70% of its base
Step 2: fill in at least 5% or 10% of the mixed soil which you prepared above on top of the coconut chunks/chips
Step 3: place the seedling into the pot and start to fill up its base with the mixed soil
Step 4: make sure the rest of the 15% or 20% of the space is filled with the mixed soil
Step 5: the seedling should stand by its own. You can press the soil down to hold the seedling together if the mixed soil is too loose.