It is winter fruits that are of interest :) what generally can suit a mild, southern climate, so that it will bear fruit in winter? generally think of the most obvious option - tangerines. But I want something else)
In fact, on the Black Sea coast you can grow everything in the middle lane, only the assortment of different varieties is wider. You can grow early, middle and late varieties of plums, pears. Also fruiting there is fig fruit, persimmon, kiwi. You can try with a light feijoa shelter. But citrus fruits (tangerines, oranges, lemons) do not grow there without shelter.