Greywacke was created in 2009 by Kevin Judd, chief winemaker at Cloudy Bay from its inception for 25 years and instrumental in the international recognition which Marlborough Sauvignon Blanc enjoys now.
The name 'Greywacke' was adopted by Kevin for his first Marlborough vineyard located in Rapaura in recognition of the high prevalence of rounded greywacke river stones in the soils of the vineyard, a sedimentary rock which is widely found in Marlborough. 
Fruit for Greywacke Marlborough Sauvignon Blanc was sourced from various prime vineyard sites in Marlborough's Southern Valleys and the central Wairau Plains, specifically in Woodbourne, Renwick and Rapaura. Soil types vary from the young alluvial soils of Rapaura and Renwick, which contain high proportions of New Zealand's ubiquitous greywacke river stones, to the older and denser clay-loams of the Southern Valleys. The majority of the vineyards were trained using the divided Scott Henry canopy management system, with the balance on a two- or three-cane VSP (vertical shoot positioning) trellis.
A vibrant mix of nectarines, yellow peaches and cassis combines with the bright fragrance of lemon zest laced with musky, jasmine-like floral nuances. The palate is packed with ripe stone fruit, melons and mandarin creating a succulent tropical-fruited style with that classic Marlborough zing.