Adenium Yellow Leaves . They are not happy however - the leaf tips turn yellow and then brown and any new leaves are very small and misshapen. I have looked in the internet but have been unable to find this sort of problem! Adenium obesum subsp. socotranum - Socotran Desert Rose ... (Lydia Hill) Adenium is a genus of flowering plants in the Apocynum family, Adenium make great Natural Bonsai plants when grown from seed and are much easier than conventional Bonsai to look. I have looked in the internet but have been unable to find this sort of problem! I've noticed a few leaves with dark spots, after a few days, the leaf turns yellow and when you pull on it a little bit, it just comes off. What is the future dream of yellow adenium gonna be? Why Leaves on a Rose Bush Turn Yellow ' Home Guides ' SF Gate. homeguides.sfgate.com > Garden > Pest Control Fungal Diseases. Buy Canary Yellow Adenium Single Lay