A complex red blend of seven varieties with Cabernet Sauvignon in the driving seat, the 2016 vintage of Rietvallei Estate is the top wine in the Heritage Collection of special, very limited-quantity wines currently available from the farm in Robertson SA. Also in the mix are Shiraz, Petit Verdot, Tinta Barocca, Cinsault, Roobernet and Cabernet Franc – the percentages roughly