Oak is the common name for over 300 species of trees belonging to the genus Quercus. Of the many species, only a few are suitable as cooperage for the simple reason they must be non-porous (i.e. not leak). White oak has blockages (tyloses) in its xylem system, the capillary tubes which move liquids from the roots to the leaves. The most common oaks of Europe … Continue reading Winemaking: Oak Barrels