Our story

We’re farmers first.

A vintage black-and-white photograph of two children and an older man on a tractor. The children are sitting on the tractor, wearing hats, with the girl on the left and a boy on the right. The man is standing beside the tractor, wearing a hat and a checkered shirt. There are trees in the background, and the tractor has a sign with the text 'ALLIS-CHALMERS'.
A vintage black-and-white photograph of two children and an older man on a tractor. The children are sitting on the tractor, wearing hats, with the girl on the left and a boy on the right. The man is standing beside the tractor, wearing a hat and a checkered shirt. There are trees in the background, and the tractor has a sign with the text 'ALLIS-CHALMERS'.

Our family has been farming here in the Yakima Valley for generations. Wine came later, but the way we approach it is the same way we approach farming - pretty meticulously.

We grow the grapes and work with great winemakers to craft small-batch wines we’re proud to pour!

More about the vineyard

Great wine starts in the vineyard.

Line drawing of a grapevine with leaves and tendrils, in a beige color on a transparent background.
Line drawing of a grapevine with leaves and tendrils, in a beige color on a transparent background.

How Bosma began

A man and a woman sitting on brown leather armchairs in a cozy room, smiling and holding wine glasses, with bamboo blinds on the windows and a decorative lamp on the table between them.
A beige, vintage-style illustration of grapevine leaves and tendrils on a black background.
Illustration of grapevine with leaves and a cluster of grapes on a black background.

Somewhere along the way, we found ourselves in a growers’ conference debate about Cabernet clones: whether they mattered, and whether anyone could actually taste the difference.

No one could quite agree. Site, farming, vintage, winemaking - there were too many variables.

So we picked up the gauntlet.

At the time, we were growing great fruit and trying to sell it before it hit the ground. Planting Cabernet clones side by side gave us a way to showcase the vineyard and let the fruit speak for itself.

That experiment became Bosma Estate Winery.

The vineyard

Bosma is rooted in the Rattlesnake Hills AVA, part of Washington’s acclaimed Yakima Valley.

Here, elevation, terroir, long summer days, and cool fall nights produce exceptional fruit.

Our focus is on Bordeaux and Rhône varietals. They were bred for our climate, so they thrive here.

We farm each row meticulously and take stewardship seriously. That’s why we’re BX-certified for responsible farming practices.

More about the vineyard

Meet our winemakers

  • Two smiling men posing at a restaurant table indoors, with large windows showing a mountain landscape in the background. One man is older with white hair, wearing a black jacket with glasses hanging from his collar. The other man has gray hair, a beard, glasses, and is wearing a gray jacket. There are bottles and glasses on the wooden table in front of them, and other diners are visible in the background.

    Mike & Ryan Seal

    Sigillo Cellars

    Mike and Ryan Seal are the father-and-son winemaking team behind Sigillo Cellars in Snoqualmie, Washington, founded in 2010. Together, they craft traditional Bordeaux and Rhône varietals, along with a few personal favorites, guided by the belief that wine should be experienced, not merely tasted.

  • A man is taking a selfie outdoors with a blue sky and white clouds behind him. He is wearing a wide-brimmed straw hat, round sunglasses, a blue button-up shirt, and a gold necklace.

    Caleb Foster

    Gunpowder Creek

    Caleb Foster has been making wine for more than 30 years, with experience in Washington, around the world, and at wineries like Woodward Canyon and Bookwalter. Since 2022, he’s partnered with Bosma on a lineup of wines that really show what our site can do.

  • A woman with long blonde hair, wearing a black jacket with the logo and text "Advise Wines," is holding two bottles of wine, one in each hand. The background features a wooden frame and a mirror or window.

    Pam Adkins

    Adrice Cellars

    Pam Adkins is a “get it done” kind of person - warm, energetic, and serious about making wine that brings people together. She’s a Syrah person through and through, with a style that lets the grape speak and doesn’t overwork it.

Visit us

The best part of this has been the people who return. Plan your visit today!

Two men enjoying a toast with wine glasses at an outdoor gathering, with a child in the background and a decorative centerpiece on the table.
Plan your visit