Paolo De Marchi has used his white grapes only for Vin Santo since 1976. Grapes are dried for up to five months before pressing and fermentation and ageing last for eight years in 'caratelli' (small barrels) on the 'madre' or starter culture.
The grapes are grown on the Isole e Olena estate which covers 320 hectares, of which 49 are planted with vines and 55 with olives. The vineyards are approximately 400 metres above sea level and face south-west. The oldest vines on the estate were planted in 1958 and the youngest in 2007. When Paolo De Marchi arrived at Isole e Olena in 1976, he stopped using white grapes, Trebbiano and Malvasia, in the blend for Chianti. He then asked the old farmers how to make the best Vin Santo possible, using traditional methods, and used the white grapes for this wine.