Your question needs to be clarified, the Merditarranean is a sea, trees do not grow in the sea
Corfu is in the Mediterranean
All true Mediterranean countries has a coast to this Sea or the components of this Sea as Adriatic Sea, Ionian Sea, Cretan Sea etc.
The Mediterranean Sea has an average depth of 1,500 m (4,900 ft) and its deepest recorded point is 5,267 m (17,280 ft).
Coastal Sage Scrub
grain, wine, and olive oil
mediterranean
Most of southern Europe is considered Mediterranean climate. In the Mediterranean climate, olive trees, grape vineyards, as well as many citrus trees grow.
The type of vegetation that grows in Mediterranean climate are plants that do not need much water. Some examples are citrus trees, olive trees, and certain types of cacti.
Chaparral (shrubs) and short trees. Example of those types of trees: Evergreens
Mainland Portugal's climate is Mediterranean. The Mediterranean climate is named for the climate that typifies countries that surround the Mediterranean Sea. It also is known as the area of the Old World where olive trees grow because olive trees flourish in this climate. Portugal's dry summers and rainy winters are typical of the Mediterranean climate.
There was not/there is not a Roman peninsula. Rome was/is in the Italian peninsula. Italy has Alpine and Mediterranean flora. Commons trees are the Alpine pines larches, firs, Mediterranean pines, almond trees, apple trees, beeches, chestnuts, fig trees, grape vines, hazelnut trees, junipers, myrtles, oaks, olive trees, pear trees, pistachios and walnut trees. Some fruit trees which grow well in the Mediterranean were introduced form Asia and Africa: apricot trees (form Armenia) cherry trees (form Turkey) lemon trees (from India) melons (form Africa), peach tree (from India) damson plum trees (from Syria) quinces and pomegranates (both from Africa). There were no orange trees in the Roman days and no tomatoes. They were introduced later.
in the the Mediterranean dry or no tropical plants grow in the Mediterranean like chaparral, or shrubs and short trees. Most plants that live in the Mediterranean climate have thick barks, long roots to reach the water and small thin leaves (needles) to reduce moisture loss. Most plants flower in the winter for that is when most of the precipitation happens.
Mediterranean climates.
malta
Grape vines, Olive trees, Citrus trees, Bay trees, and herbs such as Parsley, Thyme, Oregano, Marjoram, Dill, Sage etc.
euroasian countries, mainly mediterranean countries such as spain, italy, turkey.
It depends what kind of plant your planting, palm trees like the Mediterranean climate how ever cherry and apple trees prefer colder places.