Justinos source their grapes from vineyards located in Estreito de Cmara de Lobos, Cmara de Lobos and So Vicente. Almost all of the vines are planted on miniscule terraces, known as poios and are pergola trained, which is the traditional way in Madeiran viticulture. Of volcanic origin, the composition of the soils varies depending on the altitude of the vineyard. Most of the islands soil is made up of basaltic matter. At low altitudes the soils are darker and more compact, indicating high levels of iron, while at higher altitudes, trachytic rocks with their rough, gritty surface are more evident.