The vineyards of Tenuta San Guido cover approximately 90 hectares and are divided into areas chosen for the particular characteristics of both exposure and composition of the soil. Some of the vines are planted on the hillside, at an altitude ranging from 200 to 300 meters. Climate is crucial for a correct and healthy maturation of the grapes. It is influenced by the sea and by the hills that shelter the estate from the inland winds. The location of vineyards in different areas and elevation is an important factor in the complexity of the wines, and provides a wide choice for the harvest, depending on the weather conditions and the maturation of the grapes. This was recently proved in a study by the University of Pisa that highlighted the uniqueness of the vineyards of Tenuta San Guido by soil type and exposure, compared to the surrounding area.