Tempranillo with temperatures dropping by as much as 16 °C (30 °F) from the daytime high. The Tempranillo grape is one of the few grapes that can adapt and thrive in continental Mediterranean climates like this. Pests and diseases are a serious problem for this grape variety, since it has little resistance to either. The grape forms compact, cylindrical bunches of spherical, deep blue-black fruit with a colourless pulp. The leaves are large with five overlapping lobes. The Tempranillo root absorbs potassium easily, which facilitates pH levels of 3.6 in the pulp and 4.3 in the skin when it reaches maturity.
Washington wine Washington are Cabernet Sauvignon, Riesling, Chardonnay, Merlot, and Syrah. There are also plantings of Cabernet Franc, Grenache, Malbec, Pinot gris, Sauvignon blanc, Sémillon, Tempranillo, Viognier, Barbera, Chenin blanc, Gewürztraminer, Nebbiolo, Petite Sirah, Pinot noir, Sangiovese, and Zinfandel. Vineyard acreage dedicated to red varieties was in 2006. The four most prevalent red varieties were Cabernet Sauvignon at , Merlot at , Syrah at , and Cabernet Franc at . Vineyard acreage planted to white varieties was . The four most prevalent white varieties were Chardonnay at , Riesling at , Sauvignon blanc at , and Gewürztraminer at . Washington State is