The traditional olive groves of the "Tenuta Tresca Estate" are the result of the growth of centuries-old trees, which have been obtained through the grafting of spontaneous Oleasters ("Olea europaea oleaster") with two ancient varieties of domestic Olive tree: the "Ogliarola leccese" and the "Cellina di Nardo' ", otherwise called the "Saracen", in memory of the Saracens who, between 769 and 963, appreciated the quality of this olive tree and supported its growth. Oleasters, which can be a few tens of metres high, have an almost thorny tree, small and very bitter fruits with a low oil content, are accidentally placed in the midst of Salento's spontaneous vegetation together with other autochthonous species of trees: also birds used to unintentionally chose the place where to leave the Oleaster's seed.
In more recent times, together with traditional olive cultivation systems, there has been the introduction of new techniques, which are the result of a rational organization, based on the positive effects of mechanization and irrigation adopted in agriculture and backed by scientific progress. In particular, new olive cultivation systems have concerned some varieties of olives, such as the "Nociara", the "Cima di Melfi", the "Leccino", the "Frantoio", the "Pesciolen"and a few others, which can be considered as defining features of the Mediterranean landscape. They use to bear big fruits and not to have very tall shrubs in order to favour the picking up of "drupes" ("fruits") directly on the plants when they are fully ripened. The oil is particularly appreciated because of its bromatologic and organoleptic properties.