The Robert Hall Regenerative Organic Sauvignon Blanc is a particularly interesting Paso Robles release because of both its winemaking and the agricultural experiment behind it. Beginning in 2021, the winery compared 43 acres converted to regenerative organic farming with five acres maintained under conventional sustainable management. The vines were selected to match grape variety, clone, and soil conditions as closely as possible. The reported results included: a 13% improvement in soil water retention; 192% more CO₂ absorbed than the control block; greater microbial activity; and improvements in wine complexity, freshness, and varietal expression.