Tempranillo Navarra, and Penedès. During the 1990s, growers in Australia and South Africa started significant Tempranillo plantations. Tempranillo is a black grape with a thick skin. It grows best at relatively high altitudes, but it also can tolerate a much warmer climate. With regard to Tempranillo's production in various climates, wine expert Oz Clarke notes, In the Ribera del Duero the average July temperature is around 21.4° Celsius (70.5° Fahrenheit), though temperatures in the middle of the day in the lower valley can jump as high as 40 °C (104 °F). At night the region experiences a dramatic diurnal temperature variation,
Peloursin California vineyards that thought they were planted with Durif/Petite Sirah were found to be field blends that contain some plantings of Peloursin. In addition to being a parent of Durif, Peloursin was also crossed with Persan to create Joubertin. DNA testing also suggest a relationship between Peloursin and Bia blanc which share some morphological similarities but the exact nature of that relationship is not yet known. Plantings of Peloursin are often confused with its offspring Durif and this was particularly the case in California where many plantings of Petite Sirah/Durif were discovered to actually be Peloursin. In the Jura region,