Côte des Blancs

Côte des Blancs is the east-facing escarpment running south from Épernay, and it is the one place in Champagne where Chardonnay isn't a supporting grape but nearly the only one. The plantings are almost entirely white, growing on some of the purest belemnite chalk in the region, laid down in the Cretaceous when this part of France sat under a shallow sea. The chalk holds water like a sponge in dry years and drains coldly in wet ones, and the latitude here, around 49°N at the northern edge of viable winegrowing in Europe, ensures slow ripening and high natural acidity. That combination is why the wines keep a vertical, mineral spine that other subregions struggle to match. The Chardonnay monoculture is more recent than people assume. Through most of the 19th century the area grew a wider mix of varieties, including older white grapes that have all but disappeared from Champagne today. Phylloxera reached the region in the 1890s and forced a wholesale replant, and as growers chose what to put back in the ground, Chardonnay's reliability on chalk and its affinity for the slow, cool ripening here pushed it to dominance. The blanc de blancs identity that the area is now built on, and the prestige that comes with it, only hardened in the early 20th century.