At low altitudes the substratum consists of sandstones and sands and alternating pelitic-arenaceous sandstones variously mixed with sulphur mineralisation. In the southern sector of the area, the terrigenous deposits are diffusely covered, in discordance, with loose pyroclastites and, in evident subordination, with the lithoid volcanites of the Ignimbrite Campana. Finally, the valley floor of Sabato river is modelled in gravel and gravel-sand alluvial deposits. The prevailing soils are Andosols (Vitric Andosols, Luvi-Vitric Andosols, Cutani-Vitric Andosols), deep, on calcareous marls, mixed with ash and fall ash, with a fine to moderately fine texture; Calcisols (Haplic Calcisols), deep, marly, with a moderately fine texture; Cambisols (Calcaric Cambisols), moderately deep, with a moderately fine texture. The slopes of the vineyard areas vary, predominantly (72% of the territory), from strong (13-20%) to very strong (20-35%); a fair portion of the territory (18%) is characterised by moderate slopes (5-13%). The exposures are substantially distributed among the different directions, with a slight predominance of those between east and west. The bioclimate of the vineyard area, classified using the Winkler Index, ranging between 1640 and 2199, with an average of 1980, is particularly well suited to the production of fine wines. A significant impact on the quality of the grapes and the resulting wines is exerted by the summer temperature ranges that characterise the hilly area where Greco di Tufo is produced.