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. 
Much of the fruit for Greywacke Marlborough Pinot Gris is from the Selection Ovaille and Mission clones grown at Wrekin Terrace Vineyard in the Brancott Valley, a valley floor site on gravelly clay-loam soils typical of the Southern Valleys. A smaller parcel of the newly released Entav 52 clone (known for its small bunch and berry size) was grown at Riverbrook Vineyard in Rapaura, in young alluvial soils containing high proportions of greywacke river stones. The vines were trained on a two-cane VSP (vertical shoot positioning) trellis and crop thinning is carried out to target a modest yield of 7.5 T/Ha.
A plush concoction of pears, red apples and quince make for a rich aromatic profile with hints of honeysuckle and cardamom spice. The palate has ample body, succulent ripeness and a herbal savouriness giving the wine an intriguing array of flavours in a supple, concentrated just off-dry style.