The olive tree normally begins flowering at age of three years!
It can live at the age of 2000-3000 years! And still give fruit! You must know that the flower of the tree is highly allergenic! So if you have at the family member that is allergic to blooms it could bee a bad news! The fruit begins as a green than become black, you can cure it in any stage!
This year olives with all grain spelt bred of today baking!
I'm the one in the household with the allergy issues but I have been beating them down for years. The less processed junk I eat, the less severe my allergies. But if it blooms and if I have a problem, I'll have a likely suspect!
I don't expect to outlive the olive, but maybe pass it on for a couple of generations.