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The Gruaud Larose terroir is truly remarkable and unique. It is a single vineyard of 80 hectares with gravels from the Gironde estuary, dating from the Mindel Ist and Mindel IInd (about 700 000 years ago), and that in some places are over 18 feet deep. The soil is very poor and sandy, and therefore does not hold water. Drainage is one of the major concerns of a conscientious vine-grower.

It is also an important factor at Gruaud Larose where...