The vineyards are approximately 30 hectares in total, sited at a relatively low elevation of 150 metres. The merlot is planted in gravel-rich soils that were once the bed of a branch of the Adige. Sandier, pH-neutral soils, at elevations of 150-200 metres, host cabernet sauvignon, cabernet franc, and the venerable carmenère vineyards.
All of the vineyards are in well-drained, nutrient-poor soils that yield grapes whose wines boast levels of anthocyanins that are unusually high, and not just for Trentino.
So distinctive is this feature that this area, once called Campi Sarni, should have its own officially recognised identity.
Grapevines have been growing in Campi Sarni since 900 AD, but everything changes, and today San Leonardo’s viticultural philosophy dictates vine-rows that follow the contours of the slopes, in order to capture as much sunlight as possible.
Vine densities vary according to the period in which the vineyards were planted and to the training system.
Vineyards trained to Guyot and to spurred cordon have 6,600 vines per hectare, and yield a maximum for 60 quintals per hectare, while those trained to the Trentino double pergola are at 1,750 per hectare, which includes the carmenère. To yield really top-quality fruit, this variety needs severe pruning, which limits the crop to no more than 90 quintals per hectare.