The Roman Empire and Olive Oil

Rome modelled its culture almost exclusively on classical greece. olive oil was such an integral part of that culture, they took olive oil basically everywhere with em and olive oil cultivation or production. Olive trees grow pretty well in all sorts of different climates. As long as they're not over watered, they're going to do ok. They like bright sunlight. You can get more olives by watering them a more than just neglecting em. But you don't want to overfertilize em.