Marciano Estate produces wines from Napa Valley's North Coast region. The winery's portfolio centers on two flagship expressions: Terra Gratia Marciano Estate White, a Sauvignon Blanc, and M Red, a Cabernet Sauvignon–led blend with Cabernet Franc and Merlot. A third offering, Terra Gratia Red, combines Petit Verdot, Cabernet Sauvignon, Cabernet Franc, and Merlot. The wines have been assessed by Wine Advocate, Wine Enthusiast, Decanter, and Wine Spectator.