The wine is made primarily from the Nebbiolo grape varietal (known locally as Spanna) and like Gattinara, it may be blended with Uva Rara (known locally as Bonarda di Gattinara) and Vespolina.[1]
A minimum of 3 years total ageing is required, including a minimum of 20 months in wood and 9 months in a bottle from November 1 of the harvest year. Riserva is a minimum of 4 years of total ageing, including a minimum of 25 months in wood and 9 months in a bottle from November 1 of the harvest year.
References
^ abwinepros.com.au.The Oxford Companion to Wine. "Ghemme". Archived from the original on 2008-08-09.