Nebbiolo has the longest vegetative cycle among local varieties, and usually is harvested around the third week of October. Fermentation is carried primarily in one large cask. The Cerretta vineyard has always a slow start of fermentation, for 35-40 days on average. Post-fermentation “Cappello sommerso” (submerged cap) follows for another week in greater vintages. Cerretta is aged in large Slavonian casks for 32 months on average.