Monday, April 1, 2013

Grape Varietal Report


Grape Variety Report: Semillon
By: Lauren Yokley

            Semillon is a white grape variety that is popular in France, Australia, South Africa, Chile, and California.  Semillon grapes originated in France in the 1800s and they are the majority white variety in Bordeaux, Graves, and Sauternes.  However, Chile has more acreage of Semillon planted than anywhere else in the world, yet it ranks third among their other grapes – just behind Chardonnay and Sauvignon Blanc.  During the early viticultural development of Australia, Semillon was the dominant white grape variety.  But it is now overridden by Chardonnay and Sauvignon Blanc.  South Africa also has a similar story – it used to be the most abundant white grape (also known as Wyndruif), but today it only accounts for less than 1% of plantings.  In California, total Semillon plantings have fluctuated over the past several decades by thousands of acres.  Today, it is mainly used as a blending wine for Sauvignon Blanc as a dry table wine. 

            In France, Semillon is often used as a blending grape for Sauvignon Blanc and Muscadelle, especially in Bordeaux to make a more complex wine.  It is also the dominant grape variety used in the sweet French Sauterne wines which are very famous worldwide.  Sauternes is the world’s most renowned and longest-living unfortified dessert wine. 

            The Semillon grape can produce these amazing sweet wines because it is so prone to develop Botrytis Cinerea, or more commonly known as “noble rot”.  This disease is actually a blessing to these grapes because it produces very high sugar levels.  When the grapes are attacked by this rot, they shrivel on the vine.  They dry out and lose water, but become extremely concentrated with sugars and creates sweet fruit, roasted nut, and tropical flavors.  The sweet aromas and flavors can also be achieved by leaving the grapes on the vine longer for a late harvest that will allow more sugar build-up and leave some residual sugars after the fermentation process.

            There are about 35,000 hectares of land dedicated to growing the Semillon grape variety.  Semillon grapes have a rich yellow color when mature and with high amounts of sun exposure, they may turn amber-pink.  In warm climates, sunburn and raisining are hazards.  This grape variety typically has large berries, thin skin, and is a pretty vigorous grape that can be grown in many different climates to produce slightly different aromas and flavors depending on soil type, temperature, length of growing season, and amount of rainfall.  

            General flavor descriptors of Semillon wines include: apple, peach, pear, grass, lemon, pineapple, and asparagus.  These grapes have an affinity for oak which accentuates subtleties.  If the wine is aged in oak barrels, the flavor profile will include more vanilla, toast, and oak flavors.  As a young varietal, the Australian version is fuller-bodied and has more fruity flavors (like apricot and mango) than the Bordeaux Semillon.  Wines dominated by Semillon may lack much youthful aroma, but they tend to be full-bodied and low in acidity – they may even be “oily” or “fatty” at times.  

            A varietal Semillon wine pairs best with medium to full-bodied savory dishes like heavier fish, chicken, and pork with buttery and creamy sauces.  Also goes well with pastas that have pesto or cheese sauces.  The late harvest (sweet) wines are dessert wines meant for sweet dishes. 

In conclusion, Semillon grapes were once an incredibly popular white wine varietal but have declined significantly over the past several decades and have become more of a grape used for blending into other white wines.  It can be produced as a dry or sweet style depending on location and type of wine desired.

Sources:
http://www.winetasteathome.com/Varietals/Semillon.html
http://www.winepros.org/wine101/grape_profiles/semillon.htm
http://www.thewinecellarinsider.com/wine-topics/wine-educational-questions/grapes-for-wine-making-flavor-characteristics-explained/semillon-wine-grapes-flavor-character-and-history/
http://www.sundaytimeswineclub.co.uk/DWBase/jsp/templates/wineguide/grape-detail.jsp?genericGrapeId=20









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