What is their life expectancy. Olive trees are not grown from seed. The Best Patio Trees To Spruce Up Your Space Outsidemodern Tuscan Landscaping Potted Olive Tree Tuscan Landscape Design Olive trees tend to be self-pollinating but planting two varieties will improve pollination and productivity. How long do olive trees live . The trees that grow slowly like oak the redwoods or have although they are very different from each other have something in common. Many of the oldest trees alive today are olive trees. Longevity In proper growing conditions olive trees can live a long timerecently on Crete scientists have been documenting that some olive trees there are as much 1000 years old. Peach 10-25 years. They can live for over a thousand years in fact just to give us an idea of how long they can be specimens of giant sequoia have been found that have reached 3200 years. Evergreen and salt tolerant it prefers full to part sun and does best in Zone 10. From our experi...