O'Neill Vineyards has been producing high quality grapes in the Paso Robles area since 1982. We have been a local supplier of grapes for many wineries in the area, as well as wineries in Napa, Sonoma, Mendocino, and Lake County. What started out as a 20 acre experiment in 1982, has now grown into 150 acres planted with nine varieties. O'Neill Vineyards has always been family owned and operated, dedicated to producing only the highest quality fruit for our wines and those who buy our fruit. Cabernet Sauvignon is why O'Neill Vineyards has become so well known, but we also currently grow Merlot, Syrah, Zinfandel, Petite Sirah, Sangiovese, Chardonnay, Muscat Canelli, and Malvasia Bianca.
The vineyard site consists of over 180 acres, with vines spread across several different soil types and microclimates. Although it has taken years of fine-tuning, many improvements have been made in the vineyard to maximize these different conditions. In 1997 we switched to a vertical shoot position trellis system, and employed canopy management techniques such as leaf, shoot, and cluster thinning to reduce yields and open up the canopy. Soil and water management has also become a top priority. Paso Robles area soils commonly need annual amendments and pH adjustments in order to maintain proper nutrient uptake and overall vine health. The result has been a dramatic increase in quality reflected in the wines from these grapes. There is also a five-acre experimental vineyard on the property, dedicated to varietal, rootstalk, and clonal experimentation. The grapes from these vines are used for small-scale winemaking experiments as well.