Theorem Vineyards

Theorem Vineyards Where Diamond Mountain meets Moon Mountain, the truth of the land lives in every bottle. Experience our historic homestead in Napa Valley.

Theorem Vineyards crafts single-vineyard, single-varietal estate wines from two of the best high-elevation regions.

I’m going to let you in on a little secret.I didn’t buy this property because of the vineyard. I bought it because of th...
05/30/2026

I’m going to let you in on a little secret.

I didn’t buy this property because of the vineyard.

I bought it because of the house.

The wrap-around porch stopped me. Something about it pulled me back to growing up in Louisiana — to watching my mother work in her antique store, to porches that meant something, to houses that had lived long enough to have a point of view.

I grew up in a place steeped in history. I know what it feels like when a place is telling you something. I know when you are supposed to listen. This place was telling me to stay.

What we found when we looked closer was something we didn’t fully understand yet: one of the last remaining historical collections of 1800s-era buildings in Napa Valley was on this estate. A farmhouse. A schoolhouse believed to be the oldest in the valley. A long barn from the 1880s. A red barn that had partially collapsed — protected by a historic designation, which meant we couldn’t touch it until it fell, and then we had the honor of building it back exactly as it was. So we did.

Every restoration decision came from the same place: keep what’s real. The floors became walls. The walls became ceilings. The original hardware stayed. The iron work stayed. We opened up windows and let the mountain back in.

The vineyard, it turned out, was just as abandoned as the buildings. Heritage Cabernet planted in 1985, left to its own devices, no inputs, no attention — vines that had been finding their own way for forty years. That’s organic farming in its purest form. We didn’t rip them out. We brought them back into balance with what’s new, the same way we did with every building on this property. And we found quality we could never have imagined.

Restore, don’t replace. That’s the only philosophy that made sense here.

It started with a porch that reminded me of home. — Kisha Itkin, CEO

05/28/2026

A mountain rarely shares its slopes with Sauvignon Blanc. This one does. That is why we bought land in the Moon Mountain District.

White grapes don't usually get this kind of real estate. The steep slopes, the volcanic soils, the punishing elevation — that ground is almost always reserved for Cabernet. Higher-value fruit. Higher-earning blocks.

Our Moon Mountain estate climbs to 1,800 feet, and two clones of old-vine Sauvignon Blanc live on its east-facing hillside, both planted in 2004. Uncommon when we found them back in 2018. And yet a better setting could not exist.

Winemaker Andy Jones on what it means to make mountain-grown Sauvignon Blanc.

An old barn, reborn to host you. When a wind storm took down our circa-1880s red barn — just as the restoration of the C...
05/25/2026

An old barn, reborn to host you.

When a wind storm took down our circa-1880s red barn — just as the restoration of the Cole House was underway — we rebuilt it as it stood, working with Richard Beard Architects. But Kisha incorporated one defining addition to the shiplap cedar, shaker-style building: a wraparound deck with sweeping views of the Palisades Mountains.

Inside, the unexpected: antique French bank vault doors opening to your private lounge.

The Red Barn is now the heart of Theorem hospitality. This is where the tasting unfolds — by appointment, unhurried, the truth of our Diamond Mountain winery in every pour.

Old buildings are worth protecting, and National Preservation Month is yet another reminder.

Plan Your Visit: https://www.theoremvineyards.com/plan-your-visit/

05/20/2026

Napa Valley in May. Diamond Mountain is calling.

There's a version of this season that's entirely yours — a private lunch on the mountain, a milestone worth marking, or a full estate buyout designed around your group.

Theorem welcomes intimate, tailor-made experiences for those seeking something beyond the ordinary. Food, wine, and design. Our Calistoga estate, your vision — our team handles the rest.

Send us a message to start planning.

05/15/2026

Andy Jones on why this mountain is different.

05/08/2026

Some days you manage it all. Some days you pour yourself a beautiful glass of wine and let that be your win. Cheers to the ones doing both.

05/05/2026

Two exceptional vintages. One day left.

We only make wines that we personally love to drink. Even in that rare category, these wines stand out as a once-in-a-generation vintage in the 2023 reds alongside a showstopper in the 2024 whites. That convergence is something we didn't plan. It's something we're grateful for, and we want you to taste it.

The 2023 reds deliver the kind of depth and structure that defines a landmark year on Diamond Mountain. The 2024 whites from Moon Mountain are something different entirely — bright, precise, and alive in the glass. Together, they represent what our two estates are capable of when the land and the vintage align.

This release closes at midnight on May 6. Visit the link below to explore both vintages. https://bit.ly/theorem-spring-release

04/28/2026

This vineyard was abandoned when we discovered it.

No one had tended to it. No one had over-cropped it. The land had just been left alone long enough to remember what it wanted to be.

That's organic farming in its purest form. And it's where we started.

What we inherited on Diamond Mountain were heritage vines that had been finding their own way for forty years — Clone 8 Cabernet planted in 1985, old-school spacing, low yields, the kind of fruit that takes a long time to ripen and gives everything back when it does. Bringing those vines into balance with newer blocks isn't about making them the same. It's about understanding what each one needs, getting out of the way, and allowing the grapes to reach their full potential.

Cover crop is planted for the bees as much as for the soil — clover, legumes and native grasses that feed the hives, hold the hillsides, and put nutrients back into the ground to replace what the vines take out. We mow it in. We don't till where we don't have to. The best nutrients are in the top ten inches of soil. You don't plow through something you're trying to protect.

When there's a heat event, we cool the canopy with misters rather than flooding the ground with water the vines can't even process. When the turkeys come for the Merlot block, we put up shade cloth instead of a fight. The birds that nest in our forest keep the pest pressure down better than anything we could apply.

The bees tend the cover crop. The hawks tend the vineyard. The native hive in the old oak — 200 pounds of honey, undisturbed — has been doing its work longer than we've been here.

We farm organic without chasing the certification. There isn't time for paperwork when the work itself never stops. There are no herbicides or pesticides in the vineyard. There's no heavy hand in the cellar. There's no shortcut between the mountain and the bottle.

Just honest care for the land. The bees. The birds. The vines.



04/24/2026

We weren't looking for Chardonnay. We were looking for a mountain.

Cold nights, volcanic soil, high altitude — the same uncompromising conditions that make Diamond Mountain Cabernet what it is, but on the cool side of a ridge where white wine could find its voice and achieve excellence.

When we found this property eight years ago in the Moon Mountain District on the Sonoma side of Mt. Veeder, we weren't expecting what was already growing there.

Four small blocks. Heritage clone Wente Chardonnay.

The Wente family brought a cutting from Burgundy to the United States in 1912. On a mountain, Wente becomes something else entirely. The harsh conditions — volcanic soils, high altitude, punishing diurnal swings — stress the vine into producing tiny clusters with even tinier berries. Less juice. More of everything else.

The result is white wine for people who thought California Chardonnay was not their thing. High acid. Mineral. Bright. No butter. No oak. If you drink Sancerre, you'll understand this wine immediately. If you don't, this will be the one that converts you.

With two heritage Cabernet clones already growing on Diamond Mountain, finding heritage Wente already rooted on Moon Mountain felt less like luck and more like proof that this was the right spot on the right mountain.

The 2024 Moon Mountain Chardonnay is only available to Keepers of the Key members and our mailing list for a limited time. If you’re not a member, begin your journey today: https://theorem-vineyards.obtainwine.com/.

04/22/2026

Protecting the heritage trees on this Diamond Mountain estate was never separate from protecting the heritage vines on the hillside. Both were here before us. Both deserved to stay.

But eight years ago, this old oak was dying — and at risk of falling on the restored Long Barn. When the workers moved in to take it down, they found something that changed the plan entirely.

A native hive. Already ancient. Already extraordinary.

Andy Jones — our winemaker and resident beekeeper — estimates the colony reaches 150,000 bees at the height of summer. The honey inside the trunk has never been touched.

What remained of the tree will stand until nature decides otherwise. We don't make that call.

A Theorem keyhole crest was cast in bronze and mounted directly above the hive entrance — a quiet acknowledgment that something was already living here worth honoring. On high-pollen days, the bees returning from the fields cover it completely on their way home.

Some things on this estate we restored.

This one we just protected.

Address

255 Petrified Forest Road
Calistoga, CA
94515

Opening Hours

Monday 10am - 4pm
Tuesday 10am - 4pm
Wednesday 10am - 4pm
Thursday 10am - 4pm
Friday 10am - 4pm
Saturday 10am - 4pm
Sunday 10am - 4pm

Telephone

+17079424254

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