The sudden demand for nursery grapevines caught many growers and nurseries off balance. Most growers echo the feelings of Mark Couchman of large grower Silverado Premium Partners: “Supply is very tight. Most good rootstocks are sold out through 2013.” Bob Herrick of Herrick Grapevines in St. Helena says that major plantings by larger wineries in the Central Valley, coupled with the renewal of many of the vineyards in the Napa and Sonoma areas, are driving the demand. He sees a stron...