On July 4, 1977, Mike Grgich joined forces with Austin Hills of the Hills Bros. Coffee Company. They broke ground to start Grgich Hills Cellar. Quickly, Mike Grgich became known as “The King of Chardonnay”. Gradually, the winery purchased 366 acres, spread over five vineyards within the Napa Valley, allowing all Grgich Hills wines to be produced solely from estate grown grapes. In recognition of that significant achievement, the winery changed its name to Grgich Hills Estate.

Their five estate vineyards have been certified organic since 2006, and in 2022, they became Regenerative Organic Certified. Regenerative organic farming relies on the principle that a farm is a living, breathing ecosystem, and that every player is important. The natural processes of regenerative farming promote soil and ecosystem health, resulting in healthy living soil, superior water retention and storage, and decreased carbon dioxide in the atmosphere.