Flanagan produces Chardonnay from three distinct Sonoma County vineyard sites, each expressing the North Coast's capacity for complexity in the variety. The Platt Vineyard Chardonnay, Ritchie Vineyard Chardonnay, and Bacigalupi Vineyard Chardonnay form the core of the portfolio, with each wine rated by major critics including Wine Enthusiast, Wine Advocate, Wine Spectator, and Falstaff. The Platt Vineyard bottling averages 93.5 in prestige ratings, while both the Ritchie and Bacigalupi vineyard expressions average 92.5. Sonoma County's cool coastal influence and varied microclimates support the development of Chardonnay with structure and depth, characteristics reflected in the critical reception of these single-vineyard designates.