Where Olives Come From
The olives we enjoy on pizzas and salads grow on olive trees in USDA plant hardiness zones 10 and 11. Cultivars of these trees have been planted by people for thousands of years. The latest research into the origin of olive trees suggests they began being grown by humans as long as 8,000 years ago. Olives are still an important crop grown commercially and in backyards around the world.