Grower Champagne: reading the two letters on the label
“RM” stands for récoltant-manipulant — a grower-producer who makes Champagne exclusively from grapes grown on their own vines, and vinifies it on the estate. These two letters appear on every bottle of Champagne, in small type, followed by a registration number issued by the Comité Champagne. They are not decoration: they tell you who actually made the wine.
This article explains where to find the code, what each of the seven official statuses means, and what choosing a grower Champagne changes in the glass.
Where to find the code on the bottle
Look for the most discreet line on the label, usually at the bottom, sometimes on the back label: two capital letters followed by a number, for example RM 1234567. The number identifies the estate with the Comité Champagne. This mention has been mandatory since 1990 on every bottle of Champagne — no brand is exempt.
If you cannot spot it straight away, that is normal: it is deliberately small, and often printed in the same colour as the background.
The seven codes, and what they mean
The Comité Champagne recognises seven statuses. Here they are, from the closest to the vines to the furthest:
| Code | Status | Where the grapes come from |
|---|---|---|
| RM | Récoltant-manipulant | Own vines only. Vinified at the estate. |
| NM | Négociant-manipulant | May buy grapes or wine from others. Most of the large houses. |
| CM | Coopérative de manipulation | Harvests from several members, vinified by the cooperative. |
| RC | Récoltant-coopérateur | Own grapes, but vinified at a cooperative; sold under the grower's name. |
| SR | Société de récoltants | Several growers, often one family, joined in a company. |
| MA | Marque d'acheteur | Buyer's own brand — a retailer, restaurant or wine merchant. |
| ND | Négociant-distributeur | Buys finished bottles and applies its own label. |
Two useful markers. RM and RC differ by one letter but mean very different things: in both cases the grapes come from the grower, but only the RM vinifies them personally.
What a grower-producer actually does
The récoltant-manipulant handles the entire chain: pruning, growing, harvesting, pressing, vinifying, blending, bottling, riddling, disgorging, labelling and marketing. Nothing is outsourced. This is what is commonly called a grower Champagne.
The consequence is arithmetic: output is capped by the surface of the vines. A grower cannot make more in a year of high demand — there is only the harvest. At Doyard-Mahé, that means the slopes of Vertus, in the Côte des Blancs, and nothing else. Each step is described on our craft page.
What it changes in the glass
A grower works a limited set of parcels, often within a single village. The wine therefore carries the imprint of an identified terroir rather than that of a broad blend designed to reproduce a constant taste year after year. Both approaches are legitimate and answer different intentions: consistency of style for the large houses, expression of a place for the grower.
In practice, from a Côte des Blancs grower, that means blanc de blancs shaped by chalk: tension, salinity, a mineral finish. In Vertus, on belemnite chalk, that signature runs through every cuvée.
How to buy from a grower-producer
Three routes, easiest first:
- At the estate, by appointment. The most direct way, and it lets you enjoy a tasting before choosing. Our cellar visit can be booked Monday to Saturday.
- Ordering from the producer, by telephone or through the website form.
- At a wine merchant or restaurant — this is where the code becomes useful, since it lets you check the status yourself on the label. Our partners in France and abroad carry our cuvées.
One estate, one terroir
At Doyard-Mahé, the House has been family-run since 1927: from Maurice Doyard, co-founder of the Comité Champagne in 1941, to Carole Doyard, grower-producer in Vertus today, four generations have followed one another, the last three as grower-producers. The estate's cuvées, mostly blanc de blancs Premier Cru, all carry the same double statement of origin: the RM status, and the cru of Vertus.
Frequently asked questions
What does RM mean on a bottle of Champagne?
RM stands for récoltant-manipulant: the producer makes Champagne only from grapes grown on their own vines, and vinifies it on the estate. The code is mandatory and appears in small type on the label, followed by a registration number.
What is the difference between RM and NM?
An NM (négociant-manipulant) may buy grapes or wine from other growers. An RM works only its own harvest, so the wine comes from a known, identified set of parcels — which makes the origin directly traceable.
How can I buy Champagne directly from a grower-producer?
By visiting the estate, by appointment, or by ordering from the producer. At Doyard-Mahé in Vertus, cellar visits and tastings are by appointment from Monday to Saturday.