The Berger Vineyard Cabernet Sauvignon grape berries tend to be very small, resulting in high concentration in the wines. The vineyard is well protected from frost, as the cold air drains away. The mountain top lies to the southwest and tends to break the fog, creating a sunspot with dramatic light spots over the vineyard, even when surrounding areas and the valley below are occluded. Thus, the vineyard maximizes the sunlight in the morning, but has protection from the colder, marine air that tends to come in the late afternoon.
All these site conditions mean that the grapes have a long hang time, that is, they tend to develop in flavor and the seeds and stems will mature and turn brown well before the sugar levels reach maximum, resulting in more complexity, maturity and balance in the wine.