Choosing the Seña vineyard site took four years. The property, acquired in September 1999, is located in the western end of the Aconcagua Valley about 41 kilometers from the Pacific coast and 120 kilometers north of Santiago, the capital of Chile.
The Aconcagua Valley was chosen for its ideal viticultural climate, with rainy winters and a dry growing season. The coastal breezes that blow gently up the valley every afternoon follow the path of the exceptional transversal topography, cooling the long, hot summer days. Before deciding on a vineyard site, Errázuriz and Mondavi teams conducted temperature analysis in different areas of the valley to identify specific microclimates. in particular, weather stations were installed at several locations to measure temperature variation at different elevations, moving inland from the coast.

The hillside vineyard is located in a small subvalley that is crossed by Estero Rabuco, a crystal-clear, spring-fed stream that flows into the Aconcagua River. The surrounding hills are covered with native vegetation. The road to the property passes through a majestic stand of eastern sycamores; this same road leads to la Campana National Park, the largest natural reserve of chilean palms. The beautiful 350 hectare hillside vineyard (850 acres) has an ideal northeast-facing gradient offering about 50 plantable hectares. Its colluvial soils offer a great diversity of well-drained gravel, rock and loam.
Morning fog and potentially slower maturation patterns will contribute to create a complex wine with intense fruit flavours and a distinctive vineyard expression. The vineyard is planted mainly to Cabernet Sauvignon and Merlot. A new sector of the vineyard was planted in July of 2005, 26.5 hectares to the existing 16 were added completing the varietal mix with Merlot, Malbec, Petit Verdot, Cabernet Franc, Cabernet Sauvignon and Carmenère.

Eduardo Chadwick has been researching and studying biodynamic viticulture, and he is now convinced that this is the ultimate vineyard farming method to obtain the real expression of the soil in our wines. In his words: “I want Seña to be a unique terroir wine that tastes of where it is grown, and I am convinced that moving into biodynamic viticulture will get us there”.
The Seña team is leaded by Eduardo Chadwick with Jorge Figueroa as viticulturist and Francisco Baettig as winemaker.