Fermentation for Petrus is carried out gently, without any over extraction, in temperature controlled concrete tanks. The blend, typically pure Merlot, is defined in December and the wine is aged 18+ months in French oak barrels, 50% of which are new.
Petrus displays an intense color, a rich and complex nose and an opulent fruit. In great vintages, the wine can easily be kept 25 years or more.