Notes from Dow's:

"One of the Douro Valley’s finest vineyards, Bomfim is the heart of the company’s greatest Ports, having provided the main structure for Dow’s Vintages since it was acquired in 1896. Bomfim is a classic ‘River Quinta’ with many natural advantages: it is south-facing ensuring ample exposure to the sun; its stony schist soil affords excellent drainage allowing water to reach the vines’ deep roots. The whole Bomfim vineyard is ‘A-rated’, the highest quality grading conferred by the region’s wine regulatory body. The vineyards are now almost entirely planted in varietal batches, meaning each variety may be picked and subsequently vinified separately, thus allowing for each grape’s maximum potential to be tapped. The principal grape varieties planted are: Touriga Franca, Touriga Nacional, Tinta Barroca, Tinta Roriz and old mixed vines. Two-thirds of the vineyard is now over 20 years old, whilst one third is between 30 to 40 years old."