Jaine focuses on single vineyards across the Columbia Valley. Vines grown in Ancient Lakes, Royal Slope, White Bluffs, and Wahluke Slope AVAs are deeply vibrant and expressive in nature.

The Mercer family is a fifth-generation agricultural family whose roots in Washington’s Horse Heaven Hills date back to 1886, when they first settled the land as sheep ranchers. Over the decades, they evolved alongside the region, transitioning from sheep to cattle, then expanding into row crops and large-scale farming, while maintaining a deep commitment to stewardship of the land. Their legacy is defined by resilience, innovation, and an enduring connection to the high-desert landscape they have farmed for well over a century.

In 1972, the Mercer family helped pioneer the Washington wine industry by planting the first wine grapes in the Horse Heaven Hills, recognizing the region’s unique potential for world-class viticulture. Today, they continue to farm thousands of acres along the Columbia River, growing premium wine grapes alongside a diverse range of crops. Their work bridges tradition and progress, combining generations of ranching knowledge with modern farming practices to produce wines that reflect both the character of the land and the legacy of a family deeply rooted in it.

The Mercer family acquired Matthews Winery in 2026. Having grown fruit for Matthews and its sister brands for years, the partnership was deep rooted in shared vineyard and winemaking philosophies. Their vision for Matthews is simple: protect what makes it great while elevating it through deeper vineyard integration. They are passionate about preserving the brand’s identity, while using their generational farming expertise to enhance quality and strengthen its role as a leading, vineyard-driven Washington winery.