The UGA Castellina, whose extension coincides with the borders of the municipality of Castellina in Chianti is, among the Chianti Classico UGAs, the one with the greater surface area cultivated with vineyards, followed closely by UGA San Casciano. Unlike the latter, the distribution of vineyards, however, is much less uniform, especially depending on the side taken into consideration.
East of the provincial road that connects San Donato in Poggio to locality Fonterutoli, the vineyards are concentrated around the small village of La Piazza, resulting almost equally divided between the Sillano Formation and the Alberese.
The western part of the same Provincial Road is instead one of the most densely cultivated areas of the entire denomination and is characterized by a notable difference in altitude and the presence of different geological formations.
Between 300 and 500 meters above sea level, vine cultivation is possible develops mainly on land belonging to the Formation of Sillano. In the range between 200 and 300 meters above sea level, instead it finds the widespread presence of soils of lake origin, more clayey in the north-west part of Lilliano and stony in the remainder part. The southern belt, also associated with lacustrine deposits, is more extensive and generally characterized by finer and clayey soils, which explains the rounded and distinctive profile of these hills. An exception notable is represented by the Rencine area, where the geological framework it is among the most complex of the entire denomination.
In the UGA Castellina area there is also a significant part of surface area cultivated with olive groves, specifically 750 hectares, equal to 7.5% of total.