Grower Champagne: What RM, NM and CM mean on the label

Where do RM, NM and CM appear on the Champagne label?

Anyone who turns a bottle of Champagne around will usually find an unassuming line at the bottom of the label. There, two letters and a number appear: the matriculation, or registration number, of the producer. The letters assign the producer to a professional category. This makes it possible to tell, even with an unfamiliar name, whether a large house, an individual grower, or a cooperative stands behind the bottle.

The background lies in the region's particular structure. Around 16,200 growers farm about 90 percent of the vineyards, yet most sell their grapes to houses or deliver them to one of roughly 130 cooperatives. Only a portion press, ferment and market the wine themselves. It is exactly this distinction that the code makes visible.

RM, NM, CM: the three main codes

RM stands for récoltant-manipulant, literally harvester and processor. Such a grower picks their own grapes, presses them, turns them into base wine, and lets it undergo a second fermentation in the bottle. In the trade, the result is called grower Champagne, or Winzerchampagner in German. Many of these producers own only a few hectares, in one or two villages.

NM stands for négociant-manipulant, the trader who processes the wine themselves. These are the Champagne houses that buy in grapes, must or wine and blend their own cuvées from them. All the big brands carry this code, but so do many smaller houses. CM stands for coopérative de manipulation: a cooperative processes the grapes of its members and sells the Champagne under a joint brand.

RC, SR, ND and MA: the rarer codes

Four further abbreviations are encountered less often. RC, récoltant-coopérateur, marks a grower who has their grapes processed by the cooperative and then takes back the finished Champagne to sell it under their own name. The label then shows a grower's name, but the wine actually comes from a shared cellar. SR, société de récoltants, denotes a group of growers, often from one family, who produce together.

ND stands for négociant-distributeur. Such a trader buys finished bottles and puts their own label on them, without doing anything to the wine itself. MA, finally, stands for marque auxiliaire, a secondary or buyer's brand. Supermarket and restaurant brands often carry this code. Anyone looking for the real producer behind such a brand won't find it in the brand name, but encoded in the registration number.

Is grower Champagne better than Champagne from the big houses?

Not automatically. A house blends grapes from many villages and can compensate for the weaknesses of a given vintage; that is a quality in its own right. A grower, by contrast, works with whatever grows in their own vineyards. Their Champagne therefore often tastes more strongly of a particular place, of chalky soil in the Côte des Blancs, or of Pinot Noir from the Montagne de Reims. For the curious, this is exciting, because it lets you compare villages against one another.

A word of caution comes from the codes RC and MA: a grower's name on the label doesn't necessarily mean that grower actually stood in the cellar. The German equivalent, Winzersekt, is regulated differently. It must come from the producer's own grapes and own base wine, be traditionally fermented in the bottle, and state the grape variety and vintage. The actual sparkling-wine production, however, may be outsourced to a service provider.

Anyone specifically seeking grower Champagne should look for two things: first, RM before the number, and second, the place name in the address line. If a village on the Côte des Blancs is listed, Chardonnay is likely dominant; in the Montagne de Reims, Pinot Noir is more likely; along the Marne, Meunier often plays a leading role. Many growers also state the grape variety, the vintage of the base wines, or the disgorgement date, meaning when the lees were removed. Such details are voluntary, but they help with comparison.