After the very cold and dry winter of 2011–2012, bud break lasted throughout April. The rains of April and May, coupled with mild temperatures, resulted insignificant mineralization and strong vegetative growth of the vines. Flowering was late (29 May) and drawn out, with a delicate fruit set. The old Merlot plants have at times seen yields reduced due to coulure (shatter, a failure of the fruit to set) or millerandage (shot grapes, incomplete development). There was settled summer weather from 15 July, with the hottest August since 2003, allowing partial recovery of the growth cycle. From mid-July onwards, 2012 was one of the driest vintages of recent years (along with 2005, 2009 and 2010), resulting in a significant water deficit (120mm lower than the thirty-year average). Ripening in early August was prolonged, with peaks of temperature from July to September and reduced rainfall. The biggest daily temperature difference recorded was 12.9°C, the highest in eight years, favoring a high level of anthocyanins and aromatic intensity. September and October were mild, close to the seasonal norm (27–28°C on 5 October).