By 1985, Clos Malverne had been supplying its wine grapes to Stellenbosch Farmers’ Winery for a number of years, when Jeremy Walker, now of Grangehurst farm, suggested to Seymour at a braai on Christmas Eve that they make wine from Clos Malverne’s grapes. Therefore, 800 bottles of Cabernet Sauvignon were made in 1986, and the 1987 vintage was so encouraging, that Seymour decided to go into winemaking full time. The Cabernet Sauvignon ’88 was the first release to the public, and a year later Jeremy Walker joined Seymour as full-time winemaker.

During the 90’s Clos Malverne made significant inroads into the wine business, increased its vineyard plantations, which included Pinotage for the first time. Other red varietals, including Merlot and Shiraz, were also planted on selected sites with specific soil compositions to ensure the growth of premium grapes. In 1995 Clos Malverne was one of the very first wineries to produce a classic Cape Blend (a red wine consisting of at least 30% Pinotage, but not more than 70%). The wine was such a success that the flagship wine, called the Clos Malverne Auret, was changed from a Cabernet Sauvignon / Merlot Bordeaux style blend to a Cape Blend (Cabernet Sauvignon / Pinotage). The Auret 1998 vintage was the first Cape Blend ever to receive 5-star status in the prestigious Platter Wine Guide.

After receiving such high praise, the same wine went on to be the South African Red Wine Championin 2001; it was eventually awarded the Grand Prize as most outstanding wine (red or white) of that year.