Grapes grown are the typical varietals from the Canary islands: Listen Negro and Negramoll are the most present red grapes, while Gual, Moscaltel and Listan Blanco are favorite choices for white grapes. Find out more about Spanish wine grapes in this link.
Wineries have incorporated new technologies in recent years, though a large degree of traditional-style winemaking can still be seen. The reputation of red wines is increasing as vineyards become more mature and wineries adapt to modern techniques. Sweet wines are of top-level and benefit from the excellent quality and taste of Malvasia volcanic (Malvasia grape planted on volcanic soils).
Production of wines in this region is not easy, with vineyards typically planted in uneven plots. Very little automation is possible and on some plots, grape picking and taking care of the vineyard implies titanic work. This explains why most visitors to the island rarely taste local wines. Most all-inclusive hotels in Tenerife and the Canary Islands, in general, serve mass-market Spanish wines from highly respected brands from Rioja or Catalonia, rather than wines from locally sourced producers.
Some interesting wineries include Bodegas Monje at El Sauzal, La Isleta at La Laguna, Insulares Tenerife at Tacoronte or AFCAN in Tegueste.