As a comment about Desert Rose (Adenium obesum)
When re-potting, put this in a pot just slightly larger than its root system. Pot-bound plants can be watered frequently in hot weather. Otherwise, be careful about the watering regimen as these plants cannot tolerate sitting in water, especially in cool weather. Many of these plants lend themselves to "root spreading" at re-potting time. Whether the idea is to try to develop large roots or not, spreading the roots out during potting is recommended.