Grgich Hills produces wines from St. Helena that have earned recognition from Wine Enthusiast, Decanter, Wine Advocate, Wine Spectator, and Falstaff. The winery's portfolio centers on Cabernet Sauvignon and Zinfandel. Miljenko's Selection Crljenak Kaštelanski, a Zinfandel, leads the range with a 95.0 average prestige rating. Two Old Vine Cabernet Sauvignons follow: the Premiere Napa Valley Paradise Block Old Vine Cabernet Sauvignon at 93.5, and the Yountville Old Vine Cabernet Sauvignon at 93.2. These wines reflect the character of their St. Helena terroir, where Cabernet Sauvignon thrives in warm days and cool nights, developing structure and depth. The focus on old-vine fruit speaks to a commitment to mature vineyard sources, which typically yield concentrated, complex expressions. The presence of Zinfandel alongside Cabernet underscores a willingness to work with the region's diverse plantings.