Suolo means soil, the rich confluence of Tuscan terroirs which host Argiano's oldest vines. Sangiovese is sourced off two elite vineyard blocks, cropped to a mere four or five bunches per vine, intensifying the flavours in the grapes and achieving extraordinary concentration. Just 3,000 bottles and sixty magnums of Suolo are made annually from the limited yields of these precious sites.

Grapes are selectively harvested by hand in mid October and brought to the winery in small crates to avoid any damage to berries. The large proportion of whole fruit initiates carbonic maceration as grapes begin to ferment from the inside out. The must is left in contact with skins for three weeks gaining maximum extractions before being run off to 225 litre barrels. The wines complete malolactic in a selection of completely new French oak barrels of the finest grain, coopered to facilitate softness of tannin and fruit. Components are racked once over a period of fifteen to seventeen months. Suolo is usually bottled in July with no filtration and may throw a harmless sediment which is the sign of natural, quality wine.