Champagne Chavost Assemblage Brut Nature (Double Magnum) (3 L)

In 2019, chef de caves Fabian Daviaux — great-grandson of a founding member of this 1946 grower cooperative — persuaded over 70 multi-generational families to abandon sulphur additions, dosage, and conventional inputs entirely, converting all 22 plots to organic viticulture simultaneously. That collective act of conviction is what sits inside this Double Magnum.

The fruit comes from clay-limestone and chalky-limestone soils across Chavot-Courcourt, an unclassified village at the precise geographic junction of the Côte des Blancs and the Vallée de la Marne — a dual soil mosaic that pulls tension from chalk and texture from clay, amplified by 35–60 year old vines whose root systems reach deep enough to express both.

Only first-press cuvée juice is used — taille entirely excluded. Base wines ferment spontaneously with indigenous yeasts at 17°C; malolactic conversion follows with indigenous bacteria at 20°C, unsupported by enzymes, tannin additions, or acidification. No sugar is added to the liqueur de tirage, making the second fermentation in bottle a feat of precision with naturally present residual sugars. After a minimum of approximately 20 months on lees, the wine is disgorged with zero dosage and zero added sulphites — total SO₂ measured at just 6–18 mg/L — then bottled unfiltered and unfined.

The 3L Double Magnum format slows secondary oxidation and extends the lees-contact surface ratio, giving this 47% Chardonnay / 47% Pinot Meunier / 6% Pinot Noir assemblage a longer, more integrative aging arc than the standard 75cl — unusual for a zero-sulphur wine where format stability is a genuine technical risk most producers avoid.