Buena Vista became The Count's viniculture laboratory. He constantly innovated and experimented with blends, techniques and viticultural practices, including dry-farming, hillside planting, tightly-spaced vines, and techniques to limit yields in order to increase concentration and flavor. He constructed the first gravity-flow winery in California and in the surrounding hills, he excavated Sonoma's first caves for aging and storing wine with the aide of Chinese laborers, whose virtues he extolled. He is also credited with being the first to experiment with Redwood barrels for aging and fermenting, an adaptation of traditional European oak barrels that employed the resources of the local forests.
With evangelistic zeal, Haraszthy was a pioneering force in the growth of the California wine industry. He promoted California grape-growing at every chance possible—selling rooted vines and cuttings, writing papers, pleading with his friends to invest and winning wide acclaim for the breadth and quality of his Buena Vista wines. In speeches at state and county fairs, he suggested the formation of a state agricultural school and the development of a viticultural nursery that would propagate and distribute vines to vintners across the state. He also predicted that "wine-growing in this State will, before long, exceed in value the amount of gold exported." He was truly a visionary man.
Then came The Count's famous wine expedition to Europe. In 1861 he persuaded the state to sponsor a tour of continental Europe to study and report on European methods in order to improve California viniculture. He believed that his most impactful contribution to California winemaking would be to help expand the quality and diversity of vines grown, and encourage winemakers to experiment with the best combinations of vineyard, vine and rootstock to find the best fit for their site. The Count, along with his son Arpad, who had been studying in Champagne, scoured Europe's best wine regions—even crossing the Alps on mule—exploring numerous vineyards, interviewing dozens of esteemed wine connoisseurs and collecting hundreds of vines.
Following their extensive journey throughout France, Germany, Italy, Spain and Switzerland, he and Arpad returned to Sonoma with thousands of vines and samples, representing over 487 varieties—many of which were soon planted throughout the Buena Vista vineyards. As a result The Count is credited with inspiring California's winemakers to focus on improving viticulture and to plant premium vines for creating remarkable California wines. Arpad would later go on to produce Eclipse, California's first successful Methode Champenoise wine.
When The Count returned, it was to a nation embroiled in the Civil War and the State of California refused to reimburse him for his travels or the vines he collected. Nevertheless, The Count forged on.
Capitalizing on the learnings from his trip to Europe, he authored an acclaimed book on horticulture and winemaking entitled "Grape Culture: Wines, and Wine-making, with Notes Upon Agriculture and Horticulture" (New York: Harper 1862). This volume quickly became an essential handbook for many California vintners, cementing both The Count as a premier wine-making pioneer and Sonoma as America's premier wine region. That same year he was elected president of the California State Agricultural Society.
By the late 1850s, California, an incredible gold mine of opportunity, was attracting thousands of new residents from across the country—and its attractive reputation as a successful wine region was also gaining importance—well beyond just table grapes and juices. Vineyards and wineries began to spring up throughout the state—with more than 10 million vines already planted.
Interestingly his two sons, Arpad and Attila, married General Vallejo's daughters, uniting two of early California's most prominent families; families deeply invested in California's vinous future.
The Count's next chapter would continue to chart the future of California's wine industry.