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Cinnabar Winery

2015 GSM, California

2015 GSM, California

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SKU: 6705

The Taste


Red Currant, Rhubarb, Sweet Tobacco

The Science




Varietal Content
45% Grenache
33% Syrah
22% Mourvèdre

Morro View, Spanish Springs, and Sandy Lane 

174 cases produced
Harvested Sept. 5 & Dec. 15, 2015
Released Sept. 1, 2017
Age 5-7 years

The Magic

  • 2–3 days cold soak; 25% whole cluster fermentation
  • 10–12 days fermentation in plastic open-top bins
  • Punched down 2–3 times per day to ensure complete fermentation
  • Fermented warm to 85 degrees
  • Aged for 20 months in French oak barrels (30% new)

The Alchemists


George Troquato, Winemaker
Alejandro Aldama, Cellar Master

The Grape

Grenache, Syrah, and Mourvèdre are the three grape varieties used in GSM blends, which are commonly blended together in the Rhone Valley in the South of France. Grenache adds acidity and bright fruit aromas. Syrah imparts aromas of violets and carnations, and gives wine structure. Mourvèdre adds dark fruit flavors such as blackberry, as well as a gamy, earthy quality. 

The Land

The Grenache and Syrah are grown in the Edna Valley, in San Luis Obispo County, within 10 miles of the Pacific Ocean. The region experiences cool days and nights. Rocky, shale soils allow the grapes to fully mature from ample hang time. The Mourvèdre is grown in the town of Oakley, in Contra Costa County, and was planted in extremely sandy soils by Portuguese immigrants more than 100 years ago.

The Season


In early 2015, California experienced 30% more rainfall than in prior years, easing concerns over a possible fourth consecutive drought. Bud break in March was normal, but May was cold and wet, disrupting bloom and reducing crop loads up to 40% in some areas. Despite this, the vintage produced wines that are more structured, ensuring greater ageability.

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