Wine from the Coturri Way
Marioni Wine is one of Sonoma Valley's most compelling natural wine projects — a fifth-generation Sonoma native's vision of zero-intervention winemaking, rooted in the legendary "Coturri Way" learned from one of California's most iconic natural wine families. [^80^] Founded in 2019 by Dan Marioni — a former mechanical engineer who left the corporate world to pursue wine — the label is built on a philosophy of "zero additions and zero subtractions": nothing added to the wine or fermentations, nothing taken away. [^80^] [^95^] The wines are hand-farmed from organic and regenerative vineyards, vinified at Magnolia Wine Services in Sonoma, and each cuvée carries a label of original black ink prints carved by Dan himself. [^80^] It is wine as art, farming as activism, and terroir as the only ingredient that matters.
From Mechanical Engineering to the Coturri Way
Dan Marioni did not grow up planning to be a winemaker. A fifth-generation Sonoma native with deep roots in the valley, he pursued a career in mechanical engineering — a path that was stable, structured, and entirely unrelated to wine. But the pull of his homeland and the growing natural wine movement proved too strong to resist. In 2016, Dan made the leap: he began working at the historic Coturri Winery alongside Nic Coturri, learning the "Coturri Way" of winemaking. [^80^]
The Coturri family — led by Tony Coturri, with Nic as the next generation — has been making dry-farmed, zero-zero wines in the hills of Sonoma since the 1960s. [^87^] Their philosophy is radical in its simplicity: organic farming, native yeast, no additives, no sulfur, no manipulation. For Dan, this was not just a technique — it was a way of seeing wine, land, and community. The Coturris proved that California could produce world-class natural wine, and Dan absorbed that lesson with the intensity of a convert.
After three years of apprenticeship, Dan launched Marioni Wine in 2019. [^80^] The name is his own — a declaration of identity and place. He vinifies and crushes at Magnolia Wine Services in Sonoma, a shared facility that serves as a hub for like-minded natural winemakers in the valley. [^80^] But the heart of the operation is the vineyard: Dan is obsessed with farming, working to prove that hand-farmed, organic, and regenerative practices lead to the highest quality wines that are a true representation of their place of origin. [^80^]
Dan's artistic side is as integral to Marioni as his farming. Each cuvée is labeled with original black ink prints that he carves himself — a practice that connects the visual identity of the wine to the hands that made it. [^80^] The labels are not designed by a branding agency; they are carved by the winemaker, pressed by the winemaker, and applied to bottles that contain wine made with the same hands. It is a holistic approach rare even in the natural wine world.
"Natural wine, to us, means more in the vineyard and less in the cellar. The work we put into farming intentionally allows us to take a hands-off approach to winemaking, adding nothing & taking nothing away leading to a pure representation of place in every bottle."
— Dan Marioni
Zero-Zero, Organic & Regenerative
Marioni's farming and winemaking philosophy can be summed up in two words: zero-zero. Nothing added, nothing taken away. [^80^] [^95^] This is not a marketing slogan — it is a technical reality. Dan does not add commercial yeasts, nutrients, enzymes, tannins, acid, sugar, or sulfur to his wines. He does not fine or filter. The only thing in the bottle is fermented grape juice from organically farmed vineyards. [^95^]
The vineyards are the foundation of everything. Dan works with both estate-farmed fruit and carefully selected partner vineyards that share his commitment to sound, environmentally focused practices. [^80^] All farming is organic — no synthetic pesticides, herbicides, or fertilizers. He is actively moving toward regenerative practices — building soil health, increasing biodiversity, and creating vineyard ecosystems that function as living systems rather than monoculture factories. [^93^]
The hands-off approach in the cellar is possible only because of the meticulous work in the vineyard. "The work we put into farming intentionally allows us to take a hands-off approach to winemaking," Dan explains. [^95^] Healthy vines with balanced canopies produce grapes with natural acidity, proper sugar levels, and indigenous yeast populations robust enough to complete fermentation without intervention. When the farming is right, the wine makes itself.
Dan's background in mechanical engineering shows in his precision — but it is a precision applied to restraint rather than manipulation. He understands the chemistry of fermentation intimately, which allows him to step back and let nature do its work. The result is wine that is vibrant, alive, and unmistakably of Sonoma — not a facsimile of Burgundy or Bordeaux, but an honest expression of California terroir through the lens of zero-intervention philosophy.
No commercial yeasts, nutrients, enzymes, tannins, acid, sugar, or sulfur. No fining, no filtering. The only ingredient is fermented grape juice from organic vineyards. [^80^] [^95^]
All vineyards farmed organically — no synthetic chemicals. Moving toward regenerative practices that build soil health and biodiversity. [^80^] [^93^]
Every cuvée carries an original black ink print carved by Dan Marioni himself. The visual identity is as handmade as the wine inside. [^80^]
Dan is a fifth-generation Sonoma native with deep ties to the valley. His family history grounds the project in place and community. [^80^]
Native Yeast, Whole Cluster & Time
Marioni's cellar is a study in patience and non-intervention. All fermentations are spontaneous — driven entirely by native yeasts present on the grape skins and in the vineyard environment. [^95^] Dan does not inoculate, adjust, or steer. He monitors, observes, and waits. The wines ferment at their own pace, develop their own character, and reveal their own truths.
The red wines are typically made with whole-cluster or partial whole-cluster fermentation — stems and all — which adds savory complexity, structure, and a distinctive herbal, spicy character. This technique, common in Burgundy and the Rhône, is applied with a Sonoma sensibility: the stems are not green or harsh because the farming is precise and the fruit is ripe but balanced. The result is wines with depth and dimension that evolve dramatically in the glass and in the bottle.
Aging is done in neutral French oak barrels — no new oak, no toast levels to manipulate flavor. The wood is a vessel, not a flavoring agent. Dan prefers neutral oak because it allows the wine to mature and integrate without adding vanilla, spice, or tannin from the barrel itself. The wines age for as long as they need — some for months, others for years — and are bottled only when ready.
The hand-carved labels are more than decoration. They are a statement about the relationship between maker and object. Dan carves the original block prints in black ink, then presses them onto each label. The imagery varies by cuvée — abstract, figurative, or landscape — but always personal, always connected to the wine inside. It is a labor-intensive process that most winemakers would outsource to a designer. For Dan, it is part of the same creative act as farming and fermenting.
The Rademacher Vineyard Cabernet Sauvignon 2020
One of Marioni's most acclaimed wines, the 2020 Rademacher Vineyard Cabernet Sauvignon is a shining example of the zero-zero philosophy in action. [^89^] From organic vines that exist in a living ecosystem — not a chemically managed monoculture — the wine captures what Cabernet Sauvignon can be when allowed to express itself without manipulation. The vineyard is farmed with intention: cover crops, biodiversity, and soil health are prioritized over yield. In the cellar, the grapes ferment with native yeasts, age in neutral oak, and are bottled without fining or filtration. The result is a Cabernet that is alive, evolving, and deeply connected to its Sonoma Valley origin — not a polished commercial product, but a wine with soul, texture, and a sense of place that only zero-intervention farming can deliver. [^89^]
The Marioni Range
Marioni Wine produces a focused portfolio of red wines from organic and regenerative vineyards across Sonoma Valley, Sonoma Mountain, and Mendocino County. All wines are zero-zero — nothing added, nothing taken away — fermented with native yeasts, aged in neutral French oak, and bottled without fining or filtration. [^80^] [^95^] Each cuvée carries a hand-carved black ink label by Dan Marioni. The range emphasizes varieties that thrive in Sonoma's warm days and cool nights: Cabernet Sauvignon, Merlot, Zinfandel, and Sangiovese. Prices are approximate and in USD.