For the airfield see: RAF Mount Farm Terhune Orchards is a winery in Lawrence Township in Mercer County, New Jersey. A family produce farm since 1975, the vineyard was first planted in 2003, and opened to the public in 2010. Terhune has 5 acres of grapes under cultivation, and produces an estimated 1,100 cases of wine per year. The winery is named for the family that formerly owned the farm.