Tending a mountain vineyard requires extra time and care. Growers use little machinery, and pick all of their grapes by hand - an unbeatable method of quality control. The open structure of Mount Veeder soils limits moisture retention in the grape ripening period. This built-in restraint, combined with thin soils and a general lack of groundwater, enables vineyard managers to induce a degree of stress critical to the production of high quality fruit. The ratio of berry skin surface area to liquid volume is high, yielding intense and concentrated juices.