Don Olegario works with the Atlantic-facing vineyards of Galicia, Spain's northwestern maritime region. The winery focuses on indigenous varieties suited to the cool, humid climate: Albariño, the region's signature white grape, and Caiño tinto, a dark-skinned local variety adapted to Atlantic conditions. The Albariño expresses the mineral, bracing character typical of Galician whites—high acidity, citrus-driven aromatics, and salinity from proximity to the coast. Caíño tinto, less widely known outside the region, brings structure and earthy complexity to the portfolio. Flores de Mayo Albariño and the core Albariño bottling represent the winery's commitment to these varieties. Decanter, Wine Advocate, Wine Spectator, and Wine Enthusiast have all assessed the winery's output, reflecting its standing among serious wine critics.