Traditionally, Viosinho has been an unpopular variety with growers because of its very low yields. It's only recently that winemakers have realised what a treasure it is, as a component both in port and in unfortified Douro white blends. It makes full-bodied but fresh, fragrant, well-balanced wines, performing best in hot, sunny climates where it is less prone to oidium and botrytis infection. Bunches and grapes are small and early-ripening.