Herdade do Rocim is associated with the Sustainable Program of the Alentejo Viticulture. This wine is made from organically grown grapes; 70% of the vineyard is certified, and the remaining 30% is in conversion. The estate is situated on the Vidigueira fault, a 30-mile-long east-west facing escarpment which rises to 420 metres. The fault significantly influences the climate, trapping the cool, humid Atlantic winds, so despite its southern location, it is one of the most temperate sub-regions in the Alentejo. These cooling and humid influences descend at night, creating diurnal temperature differences of 15°C, which extend the ripening period. The warm days concentrate the flavours in the grapes while balancing natural acidity, which is retained during the cool nights. The soils are of granitic and schistous origin. The water level in the soil is rich and superficial, nourishing the vines during the warm summers. All grapes are manually harvested.