The Timorasso grape variety is an indigenous white-skinned grape from the Colli Tortonesi area. It has been reported in this region since the Middle Ages, and over the centuries, it became the most widely cultivated grape variety in the area until the arrival of phylloxera and the Second World War. This was followed by years of progressive abandonment of the countryside and a reduction in vineyard area, during which Timorasso was gradually replaced by more manageable and productive varieties. In recent years, there has been a resurgence of interest in Timorasso, thanks primarily to its excellent winemaking characteristics. Historically, Timorasso cultivation covered a vast area, extending from the Alessandria region to Novi Ligure and the Tortonese, reaching as far as Voghera in the province of Pavia. Currently, it is an authorized grape variety only in the provinces of Asti and Alessandria.

The Timorasso cluster is medium to large, fairly compact, and elongated, with medium-sized, spherical berries that have a green-yellow skin, thick and resilient, and fleshy pulp with a neutral flavor. The leaves are medium-sized and pentalobate, dark green with a light fuzz on the underside and pronounced veins. Timorasso has notably inconsistent yields, but it compensates with good resistance to diseases and weather events. Its vigor is lower compared to most white grape varieties.

The wine produced from Timorasso is white, dry, full-bodied, and relatively alcoholic. It is also suitable for short aging.