The dominant landscape is characterised by an elevation range that goes from medium (300 - 500 m a. s. l.) to high (500 - 700 m a. s. l.) which, respectively, represent 51% and 23% of the entire DOCG Fiano di Avellino area. The remaining territory has an elevation range that goes from medium (700 - 1000 m a. s. l., 15%), high (1000 - 1577 m a. s. l., 7%) and low (235 - 300 m a. s. l., 4%).
The geology of the area is clearly dominated by calcareous and calcareous-marly lithologies, with discordant Quaternary deposits of predominantly volcanic and alluvial origin. Among the volcanic deposits, ignimbrite is mainly found in the valley bottom, associated with the deposits of the main watercourses, while alluvial deposits are also found, in patches, on the reliefs.
The predominant soils are Verisols (Eutric, Pellic and Calcic Vertisols), deep and fine-textured, and Cambisols (Calcari-Vertic Cambisols), fine to moderately fine-textured. The presence of moderately fine-textured Calcisols (Haplic Calcisols) and moderately coarse-textured Andosols (Molli-Vitric Andosols and Luvi-Vitriv Andosils) on ash and pumice fall deposits is also possible.
The slopes of the areas planted with the vines vary from moderate (5-13%) to strong (13-20%) and very strong (20-35%), with a dominance of strong slopes (40% of the area planted with vines). The exposures are broadly distributed among the different directions. The bioclimate of the vineyard area, classified using Winkler Index, ranging between 908 and 2136, with an average of 1836, is particularly well suited the production of fine wines. A significant impact on the quality of the grapes and the resulting wines is exerted by the summer temperature fluctuations that characterise the hilly area where Fiano is produced.