Regional law dictates that Sherry must be produced within the triangle formed by Jerez de la Frontera, Sanlúcar de Barrameda, and El Puerto de Santa María. The Palomino Fino grape accounts for approximately 95 percent of vineyard area, thriving in the white albariza soils which retain moisture through the dry Andalusian summer. Wines are classified after fermentation based on their initial structure and potential for biological or oxidative development.
Fino and Manzanilla undergo biological ageing under a veil of saccharomyces yeast known as flor. This layer protects the wine from contact with air, consuming residual sugars and glycerine while contributing distinct acetaldehyde aromas. These wines are fortified to 15 or 15.5 percent alcohol, the specific threshold required to sustain the yeast. In contrast, Oloroso is fortified to 17 percent, which prevents flor growth and initiates oxidative ageing in the solera system.
Local custom involves consuming Fino and Manzanilla chilled, typically alongside saline tapas such as olives or cured ham. Most bodegas in the region maintain public visiting hours between 10:00 and 14:00, closing during the mid-afternoon before reopening for evening trade. The annual harvest generally commences in late August or early September, depending on the heat levels recorded in the Guadalquivir valley.