Grower Champagne
Grower Champagne, by definition, is produced by a grower who makes and markets Champagne under their own label, from grapes exclusively sourced from their own vineyards and processed on their own premises. If you look carefully, in small letters, "RN" (Récoltant Manipulant) is visible on the label.
This is in contrast to larger brand houses who typically buy from numerous growers and produce a blend.