Non Vintage
Most of the Champagne produced today is "Non-vintage", Non Vintage Sparkling and Champagne is generally blended from wines of several years for the purpose of achieving a constant House style. Many NV Champagnes are a blend of upwards of thirty or forty different wines and will depend on the history, tradition and image of the house unto itself.
In France, a non-vintage Champagne cannot be sold until it is at least 15 months old. Most houses of certain quality will age the wine in their cellars for periods beyond. Cellar age: An NV wine can and will often improve in the bottle after purchase, giving way to softer, fuller flavors. However, it is not recommended to keep NV Sparkling-Champagne longer than it was originally cellared.
