Stems are the woody framework of a grape bunch, and the choice to include or remove them before fermentation shapes red wine. Whole-cluster (stem-inclusion) fermentation can add aromatic lift, spice, fresh acidity, tannin and a green or floral note, but unripe stems bring bitterness. Most producers destem, while others use a proportion of whole clusters as a stylistic signature, notably in Syrah and Pinot Noir.
WHY IT MATTERS FOR COLLECTORS
Whole-cluster character — a peppery, floral, structural lift — is a hallmark of certain Burgundy, Rhône and New-World producers. Recognising it helps you read a winemaker's style and a wine's aromatic complexity.
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