Where grown: Lazio, Toscana, Umbria: it grows in central Italy in sporadic plots of vines and is probably most abundant in Lazio.
Viticulture: Giacchè is a very late-ripening variety, producing very small wine volumes (very small berries).
Wine style: Deep purple in colour, with aromas and somewhat chunky flavours of prunes, cocoa, and herbs, invariably with a weedy, floral edge. Giacchè wines offer real structure but relatively smooth tannins. The air-dried version (made from grapes left on the vine but with the stalks severed or twisted) offers greater depth and complexity of flavour.
See Ian D’Agata, Native Wine Grapes of Italy (University of California Press, 2014).
Italian Wine Unplugged (Positive Press, 2017), p.178-9.