Dornfelder () is a dark-skinned variety of grape of German origin used for red wine. It was created by August Herold (1902–1973) at the grape breeding institute in Weinsberg in the Württemberg region in 1955. Herold crossed the grape varieties Helfensteiner and Heroldrebe, the latter which bears his name, to create Dornfelder. Helfensteiner (Frühburgunder/Pinot Noir Précoce × Trollinger/Schiava Grossa) and Heroldrebe (Blauer Portugieser × Blaufränkisch/Lemberger) were both crosses created some decades earlier by Herold. Dornfelder received varietal protection and was released for cultivation in 1979. It was named in honor of Immanuel August Ludwig Dornfeld (1796–1869), a senior civil servant who was instrumental in creating the viticultural school in Weinsberg.
Traditionally, the red wines of Germany were mostly pale and light-bodied, but new breeds of dark-skinned grapes led by Dornfelder have allowed the production of more internationally styled reds. Dornfelder
has a depth of color, good acidity and the ability to benefit from barrique aging and the associated oak flavours. In comparison to traditional red wine varieties of Germany, Dornfelder is easier to grow than Spätburgunder, has better resistance to rot than Blauer Portugieser (as well as deeper color, more powerful flavours and more tannin), has stronger stalks than Trollinger, ripens earlier than Lemberger, and achieves higher must weights, i.e., higher natural alcohol levels than most of these varieties. Dornfelder can be very productive, and yield up to 120 hectoliter per hectare, but quality-conscious producers typically keep yields much lower. Higher-quality Dornfelder wines are velvety textured, slightly floral, often show flavours of plums, blackberries or cherries, and are typically oaked. Sometimes the wines have a hint of sweetness.
History and relationship to other grapes
left|thumb|The family tree of Dornfelder showing its parent and grandparent varieties.
Dornfelder was created in 1956 at the Weinsberg Research Center in Baden-Württemberg by German grape breeder August Herold. The variety was created as a cross of two Vitis vinifera crossing previously created by Herold, Helfensteiner (a cross of Frühburgunder/Pinot Précoce noir and Trollinger/Schiava Grossa created in 1931) and Heroldrebe (a cross of Blauer Portugieser and Blaufränkisch/Lemberger created in 1929). The variety was named after one of the 19th century founders of the school of viticulture at Weinsberg, Immanuel August Ludwig Dornfeld.
Originally created as a blending variety to add color to the pale red wines of Germany, plantings of Dornfelder were initially slow to take off. By 1970 there was only around of the variety planted. The grape was officially approved for German wine production in 1980 with plantings rapidly increasing throughout the rest of the 20th century. From 2000 to 2005-2006, plantings again doubled as wine produced from Dornfelder earn commercial success.
Outside of Europe, Dornfelder can be found in the Lodi and Sta. Rita Hills AVA of California, the Finger Lakes AVA of New York as well as in Pennsylvania and Virginia. Plantings of the grape can also be found in Canada in the British Columbia wine region of Vancouver Island.