Certified Organic. Planted in 1970 this vineyard is characterized by the Diano sandstone. Sandier than even their plot in Cannubi, the wine is well-structured when young and has lifted aromatics. Castellero sits at the very top of a hill at 270 m and faces southwest. Fermentation lasts for 7-8 days and maceration continues for another 30 days. During this time the cap is submerged and pump over is done several times a day. Malolactic takes place in cement vat before the wine ages two years in 30 hl Slavonian oak casks. The wine is transferred back to concrete for another 8 months and undergoes several rackings to allow bottling without fining or filtration. The wine ages another year in bottle before and is numbered before release.