Broc Cellars is a Berkeley, California-based natural winery that makes refreshing and approachable wines for everyday drinking. Established in 2004 by owner and winemaker Chris Brockway, they use native fermentations and organically-grown grapes. Both of the Trousseau Noir and Zinfandel come from Wirth Ranch. This is their fifth vintage making Trousseau after old Syrah vines at Wirth Ranch were grafted over in 2016. The cuttings come from Matthew Rorick Heritage Vineyard where they were propagated from the library in Jackson Vineyard, planted in 1888.