Grapes for WILLIS HALL's premium wines are contracted from world-class vineyards in the Columbia Gorge, Columbia Valley, Yakima Valley, Red Mountain, Horse Heaven Hills, Wahluke Slope, Rattlesnake Hills, and Walla Walla Valley American Viticultural Areas (AVAs) in eastern and southern Washington as well as the Dundee Hills AVA in northwestern Oregon. For Vintage 2003 these vineyards included Alder Ridge Vineyards, Chandler Reach Vineyards, Charbonneau Farms, Conner Lee Vineyard, Crawford Vineyards, Elerding Vineyard, Lonesome Spring Ranch, Morrison Lane Vineyard, Murto Vineyard, Pepper Bridge Farms, Portteus Vineyards, Red Mountain Vineyard, Seven Hills Vineyard, Snipes Canyon Ranch, and Stone Tree Vineyard. For Vintage 2004 Candy Mountain Vineyard was added to this stellar list. For Vintage 2005 Arianses Vineyard, Celilo Vineyard, Champoux Vineyard, DuBrul Vineyard, Destiny Ridge Vineyard, and Les Collines Vineyard also supplied grapes for Willis Hall premium wines. For Vintage 2006 Doebler Vineyard and Sentinel Gap Vineyard joined the list of world-class vineyards supplying premium grapes to WILLIS HALL. And for 2007, Mariposa Vineyard was added to the list of world-class vineyards supplying grapes to WILLIS HALL.

We are working on some really exciting sources of a selected few, very exotic varieties of grapes, too. Stay tuned for news of these developments as they become reality.

Key factors in terroir include, but are not limited to, number of daylight hours, daytime and nighttime temperatures, amount of rainfall, intensity of the winds, and other weather-related aspects during the growing season; winter temperatures and weather; type, depth, and drainage of soils; vineyard altitude, directional orientation, and slope; ancillary environmental aspects such as surrounding vegetation, between-row cover crops, indigenous soil microbiological communities, and vineyard pest pressures.

A winemaker, with a vision of the desired qualities of the finished wines, and a vineyard manager, using appropriate viticultural techniques, both working in harmony with the vineyard's terroir, are necessary elements in the growing of high-quality grapes used in the making of premium wines.