Mendoza accounts for 75% of Argentina's wine production and produces the world's finest Malbec — a grape largely abandoned in its native Bordeaux that found its second identity at altitude. The altitude-UV-diurnal range combination creates a physiological phenomenon: thick grape skins (UV protection) = higher anthocyanins and polyphenols = deeper colour and more complex tannin. The Uco Valley's Gualtallary subzone at 1,200-1,500m has emerged as Argentina's most exciting wine address — Zuccardi's Valle Suizo, Clos de los Siete, and Cheval des Andes are produced here.
| Year | Rating | Notes |
|---|---|---|
| 2023 | 85 | Solid year. Normal conditions. Valle de Uco continued excellence. Organic and biodynamic producers increasingly dominant in quality rankings. |
| 2022 | 87 | Good vintage. Some heat events but well-managed. High-altitude Malbec with aromatic lift and structure. Catena Adrianna and Cheval des Andes tops. |
| 2021 | 88 | Very good. Valle de Uco consistency high. Malbec with classic violet aromatics and savoury finish. Earlier drinking style compared to 2019. |
| 2020 | 84 | COVID harvest — reduced resources but focused winemaking. Good quality. High-altitude sites outperformed valley floor. Fresh, elegant style. |
| 2019 | 94 | Exceptional growing season. No hail events. Malbec with extraordinary depth and aromatic complexity. Cabernet Sauvignon and Franc also exceptional. |
| 2018 | 86 | Variable. Some hail damage in Luján. Valle de Uco (particularly Gualtallary) standout — fresh, high-acid Malbec and Cabernet Franc. |
| 2017 | 95 | Landmark year. Cool, dry conditions with ideal ripening. Valle de Uco Malbec reached extraordinary heights — structured, age-worthy, profound. |
| 2016 | 87 | Good conditions. Hail affected some Luján parcels but Valle de Uco shone. High-altitude Malbec with freshness and precision. |
| 2015 | 89 | Warm vintage. Rich, opulent Malbec with dark fruit, violets, and round tannins. Luján de Cuyo and Valle de Uco both excellent. |