Glen Ellen, California · Biodynamic Wine Country

Life Inside a Biodynamic Volcano

At Benziger Family Winery, three generations of one family have spent over four decades turning an old, abandoned ranch inside an extinct volcano into a living, breathing organism — sheep, owls, cow horns, and all.

Story by Elizabeth | Photography by Jon-Michael

The open-air tractor-drawn tram climbs past the insectary garden toward the terraced vineyard blocks.

The first thing you notice at Benziger isn’t the vines. It’s the shape of the land itself — an 85-acre bowl pressed into the side of Sonoma Mountain, the ancient caldera of a long-extinct volcano, ringed on all sides by ridgeline. Stand at the center of it, near the pond below the tasting room, and the whole estate curls around you like a held breath. Sheep graze one slope; a pair of shaggy Highland cows doze on another. It doesn’t feel like a winery so much as a small, self-contained world — which is precisely the point.

Before It Was Benziger

Before it was Benziger, it was something closer to a resort. The property was first settled in the 1800s, thriving for a while as a bed-and-breakfast crossed with a dude ranch — San Francisco guests took a fast ferry, then a train into Glen Ellen, to get out of, as Chris put it, “the fog and the smog of the city.” Prohibition ended that: the owner locked the gate expecting a short closure, then died before it ever reopened, leaving the property in probate for fifty-five years.

Mike Benziger bought the ranch with his father in 1980 — just 85 overgrown acres, and a family from White Plains, New York with no real farming background. “We didn’t know that much,” Chris said. “I kind of called ourselves the Beverly Hillbillies in reverse.” They learned the scale of it that first harvest, when the fermentation tanks were still in transit and a local junkyard operator towed in two borrowed milk tanker trucks to hold the ripe Sauvignon Blanc — which went on to win Sweepstakes at the 1981 Sonoma County Harvest Fair, beating out more than 750 other wines.

The terraces. The rows curve with the mountain’s contour rather than against it — the shape of the land dictating the shape of the vineyard, not the other way around.

The Toolkit

What "Biodynamic" Actually Means Here

Biodynamic farming, developed in the 1920s by Rudolf Steiner, treats the vineyard as a single self-sustaining organism. Benziger’s version relies on nine numbered preparations — cow manure, silica, and estate-grown herbs, composted or fermented and applied in tiny doses to build soil life and vine resilience.

500

Horn Manure

501

Horn Silica

502

Yarrow

503

Chamomile

504

Stinging Nettle

505

Oak Bark

506

Dandelion

507

Valerian

508

Horsetail

Learning the Hard Way

What they hadn’t understood was that the canopy could look healthy — green, grapes ripening on schedule — while the ground underneath quietly died. Spraying kills the topsoil’s biomass, and once that’s gone the plant pulls back, forcing the farmer to compensate with water and fertilizer. Now the farmer isn’t a farmer anymore, as Chris put it. You know what he is? He’s DoorDash — just feeding the vine, the way Seymour feeds the plant in Little Shop of Horrors. The result is a vine with a shallow root system instead of a deep one — dependent instead of resilient.

The turning point came in the mid-1990s, when Mike Benziger crossed paths with biodynamic consultant Alan York, who walked the property and, in 1995, began guiding the family’s slow conversion to Biodynamic farming — a process that meant inviting the very wildlife they’d spent years chasing off back onto the land.

Root depth matters this much for a specific reason. Two to four feet down runs a band of welded volcanic ash geologists call tufa — remnant of the same eruption that shaped the caldera. A vine watered at the surface never grows down through it; left alone, its roots work past the topsoil into what Chris calls the regolith, the fractured bedrock underneath, pulling minerals up with every new root hair. “That gives it that little mini zip code of where it’s grown,” he said. It’s the plainest explanation of terroir we’ve heard — not a marketing word, just a root system doing its job.

The estate today. The same ground that went silent by year five now supports a working farm, a pond, and a full staff — proof the land came back.

“Balance the land first, the family found, and the wine takes care of itself.”

A Living Ecosystem, By Design

Walk the property today and biodynamics stops being an abstraction fast. Roughly 75 sheep rotate through the vineyard blocks, grazing cover crops, aerating soil, and fertilizing as they go — work that would otherwise mean mowing, disking, and herbicide. A pair of Scottish Highland cattle supply the manure at the heart of the estate’s compost. Owl boxes and bluebird nests line the vine rows, their appetite for gophers and voles protecting the vines’ twenty-five-foot root systems.

At the center of it all is the insectary — a sprawling garden of more than 250 flowering plants that draws in beneficial insects and pollinators, and doubles as the source for the valerian, chamomile, yarrow, and nettle used in the preparations. It’s less a garden than an argument: a vineyard surrounded by life is healthier than one farmed alone.

The garden. Officially the insectary — less a pretty stop on the ride than the working engine behind the estate’s pest control.

The Acropolis. The Benzigers’ name for this little Greek-columned pavilion — once, by Chris’s account, the tasting room of the doctor who ran the property before them.

A Ride Through the Bowl

Benziger’s signature public experience is the Biodynamic Tram Tour, but our afternoon with Chris started somewhere more personal: climbing into his golf cart, no set route, no script. Before we’d even pulled away, he poured us each a glass of Sauvignon Blanc — cool and green-edged, with the kind of bright, stony acidity that made total sense once you’d seen the fog line still hovering a few hundred feet down the slope. “Here is the Sauvignon Blanc,” he said, handing over the glass. “So you’re drinking the wine in the vineyard.” We drank it the whole way up, glasses in hand between switchbacks, the wine getting slightly warmer and slightly better with every stop to look at something. He drove us up through the terraced blocks, tracing the rim of the old volcano while the estate unfolded below — the pond, the insectary in full bloom, the whole 85 acres visible almost at once from certain turns in the road.

Near the top of the climb, Chris pulled over above the very rows that Sauvignon Blanc had come from — the whole argument for biodynamics distilled into one moment: the wine isn’t separate from the land it came from, and he’ll happily prove it from the passenger seat of a golf cart.

The ride. Chris’s golf cart runs no fixed route — this was one of several stops made simply because something caught his eye.

Down Off the Cart

Eventually Chris parked and we finished the rest of the estate on foot. He walked us through the insectary row by row, naming plants as he went — the valerian, the chamomile, the yarrow, the stinging nettle — not as ornamentals but as ingredients, each one grown to be dried, packed, and worked into the preparations that eventually go back into the soil.

The garden does double duty, and Chris explained the second job with more delight than the first: “I always joke that’s Mardi Gras and Tinder for insects” — a place for pests to go party and propagate instead of doing it in the vineyard. Planted paths — habitat highways, he calls them — connect the garden to the vine rows, so bugs commute in and do their damage among the flowers instead of the fruit. The same logic drives the cover crops planted between rows, which change block to block and season to season. Nitrogen-fixing plants like fava beans and wild radish pull nutrients from the air back into soil farming keeps drawing down — Chris calls it the gas pedal. Grasses do the opposite, pulling water and nitrogen out when a vintage runs too vigorous, the way 2023’s heavy rains swelled the canopy toward underripe, herbaceous flavors. Grasses, in his shorthand, are the brakes — a block dialed up or down like a mixing board instead of reaching for water and fertilizer every time something’s off.

The timing of that work, he told us, is dictated as much by the calendar as the vines. The cow horns used for horn manure — the foundational preparation, numbered 500 — are packed with manure from the estate’s Highlanders in the fall and buried through the winter solstice, dug up again as the vines wake in spring. Six months underground transforms the manure into something closer to dark, sweet-smelling humus than anything its origins suggest — and Chris talked about that transformation the way most people talk about aging a great bottle.

Past the compost yard, we spent a while with the animals — two of the estate’s Scottish Highlander cattle standing at a low fence, shaggy and entirely unbothered, and a small huddle of sheep dozing in the grass nearby. Chris introduced them individually, the way you’d introduce old friends rather than livestock. Two jackrabbits bolted across the path ahead of us, and further down the hill, a mother deer and her two fawns picked their way through a gap in the vine rows, unhurried — proof enough that the ecosystem here isn’t abstract.

Caught mid-bite. One of the estate’s Highland calves, unbothered and unhurried.

The flock. A few of the roughly 75 sheep that rotate through the vineyard blocks, grazing cover crops in place of mowers and herbicide.

Not camera shy. This one got closer to the lens than intended.

What Ends Up in the Glass

By the time we settled into the tasting room, the ride made a lot more sense. Everything we’d just seen answers to 34 separate small-lot wines instead of one house style, each tied to a single block, the same 31 blocks the estate is divided into. The wine in your glass isn’t really “Benziger red” so much as that particular hillside, that particular year.

The flagship, Tribute, comes entirely off the home ranch — a dense, dark-fruited Bordeaux-style blend built to soften over a decade in bottle, and the first Demeter-certified Biodynamic wine ever produced in Sonoma County. Three more Biodynamic vineyards round out the portfolio — de Coelo on the Sonoma Coast, Bella Luna in the Russian River Valley, Sunny Slope in the Mayacamas foothills — each farmed by the same philosophy we’d just spent an afternoon walking through.

The spread isn’t random, Chris explained — it’s the geology talking. The home ranch sits on a freestanding volcano rising out of the Santa Rosa plain, the ocean some 26 miles off. Bordeaux varieties like Cabernet do well on the fractured volcanic soil here; curve around the mountain into cooler Carneros and the land favors Chardonnay and Pinot instead; push toward the coast and it’s Pinot country outright. Three wildly different wines, all explained by which side of one volcano the vines happen to stand on.

What ends up in the glass. Four estate wines, Tribute among them — the flagship Bordeaux-style blend and the estate’s first Demeter-certified Biodynamic release.

The Man Behind the Ranch

The estate is only half the story — the other half is whoever’s showing it to you. Chris Benziger, Mike’s younger brother, moved to Sonoma as a teenager and spent every summer working the ranch before officially joining the winery in 1993. Today he runs the home ranch and its biodynamic program directly: shepherding the flock, tending the fruit trees and vegetable beds, producing the preparations that go back into the soil.

What comes through immediately, riding the property with him, is how little separation there is between the man and the land. He talks about the sheep the way other people talk about their kids’ accomplishments, and can point to a block and tell you what grew there before it was replanted, why the soil drains the way it does. He’s said the only honest way to judge a wine’s quality is to have the soil of that vineyard under your fingernails — and it shows. There’s an old French saying he likes to repeat: the best impression a winemaker can leave on his wines is his footprints. “You can’t make decisions in a boardroom, miles away,” he said. “You’ve gotta walk your vineyards.” Four decades in, he’s still finding ways to make the place a little more alive than it was the year before.

Chris Benziger. The founder’s brother has led the estate’s biodynamic program since the early 1990s and now guides the ranch’s day-to-day farming.

Feeding time. Chris still does these rounds himself, four decades into the project.

One Last Toast

Before we said goodbye, we sat down together one more time — not in the cart, but back in the tasting room, working through several more wines while Chris kept imparting his love and knowledge of his family and his vines upon us. He and his siblings still tell the story of their first years on the ranch like it happened last season: thirteen displaced New Yorkers on an overgrown hillside, figuring it out together as they went.

In a building across from the tasting room, easy to miss if no one points it out, hangs a sign that says as much about this family as anything else on the property: a photo of a woman at an old stove, a pot in one hand, and underneath it, Lunch at Helen’s House. The tradition continues. Everyone is welcome. Chris’s mother started it decades ago, feeding whoever was working the ranch that day — family, crew, whoever showed up hungry. She’s since passed, but the sign hasn’t come down, and neither, by Chris’s account, has the habit of feeding people well and often — probably the actual reason so many people who work here have stayed twenty and thirty years.

Still hanging. A quiet corner of the property, easy to miss unless someone points it out to you.

Bruno and Helen Benziger — the parents who followed their children west, and never really left.

None of that shows up on a wine label or a fact sheet, but it’s the part of the visit that stuck. A vineyard can be certified Biodynamic on paper. What’s harder to fake is a man who still gets visibly excited pointing out a sheep he’s known since it was born, forty years into a project he clearly has no intention of finishing anytime soon.

For a first visit, book the Biodynamic Tram Tour — voted Best Winery Tour by USA Today 10Best, an open-air ride through the vineyards and wine cave ending in a seated tasting of Biodynamic wines paired with local cheese, roughly 75 minutes, reservation required. In the warmer months, the Tribute Tour & Tasting adds a walk through the crush pad, and a seated Chardonnay brunch flight is also on offer. The estate is family-friendly, with grape stomping offered seasonally, and leashed dogs are welcome throughout the tasting room and outdoor areas.

Planning Your Visit

Benziger Family Winery

Address

1883 London Ranch Rd, Glen Ellen, CA 95442

Website

benziger.com

Phone

(888) 490-2739

Hours

Daily, 10:00 a.m. – 5:00 p.m.

Need to Know

All four of Benziger’s estate vineyards — the Sonoma Mountain home ranch, de Coelo, Bella Luna, and Sunny Slope — carry full Demeter Biodynamic certification, a distinction only a handful of North American operations hold across an entire portfolio. Our own afternoon with Chris unfolded in a golf cart with no fixed itinerary, but the publicly bookable Biodynamic Tram Tour covers much of the same ground.

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