I am not sure of the age. My friend has been growing Adeniums and producing remarkable crosses for many years.
They have Adeniums, Plumeria & Pachypodiums as part of their landscape in their garden.
Rick
"Many times a day I realize how much my own outer and inner life is built upon the labors of my fellow men, both living and dead, and how earnestly I must exert myself in order to give in return as much as I received"