Greywacke is the Marlborough label of Kevin Judd, and the fulfilment of a long held dream. The name Greywacke was adopted by Kevin and his wife Kimberley for their first Marlborough vineyard located in Rapaura, named in recognition of the high prevalence of rounded greywacke river stones in the soils of the vineyard. Kevin registered the name back in 1993 with the vague notion that he might one day want to use it on a wine label of his own.