Melnik 55 or Ranna Melnishka Loza is a Bulgarian grape variety created as a cross between Melnik (Shiroka Melnishka Loza) and a mixture of pollen from Valdiguié, Durif, and Jurançon. It was later proven that the other parent was Valdiguié.
Although it was created in the 1960s, the grape was only recently recognized by Bulgarian winemakers, and it has yet to show its full potential. Melnik 55 is used in varietals and blends, and it typically produces ruby red wines with medium to full body and excellent aging potential.