Well, maybe not in the usual connotation of the word “chore!”
This afternoon winemaker Brian Hosmer led a few of us staff members through a vertical tasting of Semi-Dry Riesling from 2009 and the yet to be released 2010 vintage, plus 07, 08, and unreleased 2010 Late Harvest Riesling. We were comparing the vintages to ensure the new 2010 blends are consistent with prior flavor profiles. It was amazing to see how Riesling ages, the 2007 started to acquire a petrol character, common amongst aged Rieslings, in addition to maintaining great floral notes.
The petrol character in a Riesling comes from a compound group called terpenes. Terpenes are found mainly in the skins, and the concentration of each terpene accumulates as the grape ripens. As 2007 was a very warm summer here on Old Mission Peninsula, the terpenes developed more quickly than other vintages in this Late Harvest Riesling. So, after 3 years of aging, we are already tasting these characters. The 2008 hadn’t quite reached this point yet in its ageing, but is expected to be able to live for up to 7 more years. We expect the 2010 vintage to yield a very long aged wine, up to 10 years due to climate and ripening conditions that growing season.
All the Late Harvest Riesling’s were picked at 21 brix, or the measurement of sugar in the juice of the grape. It’s a fun learning experience to compare vintage variation given that constant harvest ripeness throughout the years. Other elements such as acid levels come into play to make each vintage taste different from one another. Here, we do what we can in the blending process to keep the style relatively similar from vintage to vintage.
Look for the 2010 releases of the Semi-Dry Riesling and Late Harvest Riesling later this year!






























