Strength and resiliency. Vineyard. The Planchon Vineyard is a story of strength and resiliency. Owned by Stan and Gertie Planchon, their eponymous vineyard is located on sloping, sandy terrain in the Contra Costa County town of Oakley. Half of the vines are over one hundred years old, head pruned and dry farmed. The other half is cordon trained on a two-wire vertical trellis system using the same old vine clone. Yields are typically two- to two-and-a-half-tons-per acre of ultra ripe, premium fruit. The property, purchased in the 1890s with a gold coin, is one of the few remaining vineyards in an area now populated by homes. Planted along the Sacramento Delta, these ancient, head-pruned vines have survived without irrigation in sandy loam soils for 80 to 100 years, protected from pests that have plagued other parts of the state during the last century.