I thought I revive this thread since my Adenium babies come from the same batch of seeds as Ken's /@drdawg. I seeded mine out last April. They germinated easily, grew fine over the Summer and went pretty much dormant during the Winter, along with all my Fat Plants. These babies were kept in my sunny greenhouse and watered mostly everyday, since they dried out very quickly in that spot. One can still see the brown leaf edges from this Winter, but all plants have now nice new and green leaves and have started growing.
Viewing from different angles
I would think they need new soil? Some pinching?