Sourced in the traditional way, from the highest-quality individual growers in the Douro Valley, where the varying altitude and aspect of the vineyards creates the potential for a complex wine of great character. Fermentation is halted by the addition of grape spirits before all the residual sugar has been fermented, creating a sweet, fortified wine. Single Harvest Tawny is a blend of ports from a single year which age to maturity in seasoned oak casks.