Grapes 48% Merlot, 46% Cabernet, 6% Syrah Facts The name C.M.S. comes from the blend of grapes they use i.e. Cabernet, Merlot, Syrah. This makes sense considering they are the leading the grapes in the Columbia Valley region. The Hedges estate also make a white blend of Chardonnay, Marsanne, Sauvignon Blanc. The CMS has been made since 1987, and is recognized as one of the big value-driven wines coming out of Washington State.