For partial shade the best fruits would be blueberries and kale, Swiss chard and other leafy greens. Rhubarb as well. Some fruit trees such as Italian plums and apples may produce in partial shade but it all depends on how many hours of sun and the summer temperature. As for olives, there is a nursery called Raintreenursery.com that sells hardy olive trees offering the Tuscan varieties Leccino and Maurino. You may not get ripe olives however and olives need a long hot summer to ripen. The trees can be ornamental. Keep growing, Marianne Binetti