Our spectacular jade vine appears to be dying. Some 7 years old, it covers a 15 metre tree, has a trunk about 5 inches diameter and flowers prolifically for about 5 months (we live in the tropics of Queensland). About a week ago it started looking sickly. In the last 4 days it has lost all its leaves. Our local botany expert says he has never heard of such an event. Anyone have any ideas at to what caused this, and if there is any cure? Or is it a rare natural event?