Calluna Merlot Cuvee 2015. Chalk Hill Calluna Vineyards, Chalk Hill, Sonoma County, California. The 2015 Calluna Vineyards Cuvée is an expression of the Chalk Hill appellation where great sunlight and a cool climate produces intense fruit in a wine with balancing acidity, round tannins and moderate alcohol levels. The blend expresses the power of Cabernet Sauvignon, elegance of Merlot and Cabernet Franc, and a bit of showiness from Malbec and Petit Verdot. Blend: 51% Merlot, 19% Cabernet Sauvignon, 15% Cabernet Franc, 8% Malbec, 7% Petit Verdot.