Terrantez

By the 1990s, the variety was nearly extinct on Madeira, due to a combination of low yields and the mid-19th century oidium (powdery mildew) and phylloxera epidemics that devastated the island's vineyards.

[2] The variety has experienced a slow revival in recent years,[3] but as of 2021, plantings on Madeira remain limited to 5.64 hectares (13.9 acres).

[5] There are still some limited plantings in the Minho Province where, as Cascal, is a permitted blending variety with Alvarinho and other grapes in the Denominação de Origem Controlada (DOC) wine Vinho Verde.

[6] Terrantez is one of Madeira's five traditional noble white grape varieties (along with Sercial, Verdelho, Bual and Malvasia).

To encourage new plantings of the variety, the government Wine, Embroidery and Handicraft Institute of Madeira (IVBAM) has since offered growers free viticultural advice and a €1.30 subsidy per kilogram of grapes harvested since 2016.

Some plantings of the variety can still be found in the Azores, the Portuguese island chain located northwest of Madeira in the Northern Atlantic Ocean.

Terrantez is most widely associated with the wines of the island of Madeira (in red) but some plantings of the grapes can also be found in the Azores (in green to the northwest of Madeira).