green or black olives?

Exactly the same species, it only depends on the stage of maturation at harvest! The green olive is harvested between October and November, while the black olive from December to February. Green olives produce an oil with herbaceous flavors when winter arrives, black olives produce an oil with more subtle flavors and savor closer to dried fruit. In the Vaucluse, harvest takes place from late October to late December to avoid frost altering the quality of the olives.