Pinus pinea L., commonly known as Stone pine, is famous for its edible seeds, called pine nuts. It is native to the Mediterranean area, and requires between 400-800 mm annual rainfall and 4-6 dry months for fruiting. Fertilizers, meanwhile, have demonstrated the capability to increase crop yields and improve product quality. Moreover, fertilization promotes root development and aerial plant growth, thereby contributing to the efficient use of soil and water (Sotomayor et al. 2001). Research on the effects of fertilization is readily available on walnut, chestnut and other species that produce edible seeds or nuts