Glera is the principal grape of Prosecco sparkling wine. Originally the grape was known as Prosecco (more precisely Prosecco Tondo). The variety has an unclear origin and an even more complicated ampelographic history due to the fact that several distinct varieties have been called “Prosecco-something” in northeast Italy since the 18th century. The grape is late-ripening and prone to both fungal diseases and water stress. It is widely planted in the province of Treviso.

The grape varieties of Veneto Veneto’s grape varieties are almost equally divided between white and red. More than 60% of the cultivated varieties are native or Italian grapes. Among them, the indigenous Glera, Garganega and Corvina Veronese account for almost half of Veneto’s total plantings.