Grower champagne is the term for a bottle whose producer is legally identified in Champagne as an RM, or Récoltant-Manipulant. According to Comité Champagne, an RM is a grower who makes and markets own-label Champagne from grapes sourced exclusively from that grower’s own vineyards. That is different from an NM, or Négociant-Manipulant, which is an…