The adeniums have grown quite a bit and now their stems are getting thicker.
Adenium obesum on October 20, 2008
Unfortunately during the winter the leaves tend to dry out at the tips. I don't know why, maybe they don't like the dry heat created by the radiator.
Also I forgot to water them a few times and I only noticed when many leaves started to fall off. Now I try to water them more regularly.
Adenium obesum leaf tip on October 20, 2008