100% Grillo. The Grillo comes from 9 hectares of 20-to-30-year-old estate vines planted on the limestone-rich, sandy loam soils of the Samperi contrada or zone in Marsala; the grapes for the Vignaverde or "green vine" are picked earlier than for any other De Bartoli white, generally in mid-August, for maximum acidity and freshness. The organically farmed fruit is hand-harvested, destemmed, gently pressed and then macerated with skins for approximately 24 hours. After a 48-hour settling at a cool temperature, fermentation takes places in stainless steel vats with natural yeasts only. The wine is aged on its fine lees in steel tank for 6 months; total sulfur is moderate at about 44 mg/liter. Vignaverde is classified as an IGT Terre Siciliane; its first vintage was 2013, making it the newest in the De Bartoli dry-white line-up.