Cooling breezes come through the NW corridor above and to the West of the Calistoga AVA for cooling during warmer periods.
Air movement in afternoons is a result of the Mount St. Helena and Palisades "air pump".
VINEYARD PERK: Breezes cool things down during normally stagnant air-flow periods in other AVA's. Ideal growing conditions with cooling breezes allow for acid retention, better humidity control, mildew control and better structure and ageability in grapes.
Calistoga AVA has the most extreme diurnal swing in Napa Valley of all AVA's, meaning the day time and night time change in temps in very large.
VINEYARD PERK: Having a large diurnal shift means the grapes can relax and respire at night after a warn day, allowing for more acid retention; better overnight recovery, thus better balanced wines.
VINEYARD PERK: Sloping vineyards/hillside typically have weaker, but better drained soils contributing to grapes with higher
concentration and power.
The entirety of the Calistoga AVA is underlain by volcanic bedrock and sediments more geologically uniform than other Napa Valley AVA's with valley floor environments.
VINEYARD PERK: Uniform soils throughout the regional enable growers to control vine quality and produce consistent flavors and characters within small vineyard block areas much better.
Of all the soil series in Napa Valley, Calistoga AVA has the highest percentage of volcanic type soils.
VINEYARD PERK: Volcanic soils yield more minerals for limiting nutrients that grapes need and allow for better drainage which is better for root development. Further, thinner volcanic soils lead to less green growth and more concentration of flavor within the berries.
Calistoga is at least 300 feet above sea level, with vineyards up to 1200 fee above sea level.
VINEYARD PERK: Higher elevation means cooler temperatures at night, for better growing conditions and ultimately better structure in wines.
There is little variation in climate within the Calistoga AVA region.
VINEYARD PERK: Having uniform meso-climate from area to area and from vintage to vintage allows growers to farm efficiently and control grape quality much easier compared to other AVA's throughout Napa Valley.
TO LEARN MORE ABOUT OUR UNIQUE AREA, VISIT THE CALISTOGA WINEGROWERS WEBSITE.
The old toll road inn
The highest recorded rainfall every year is in the Calistoga AVA, especially on the higher elevations.
VINEYARD PERK: Grapes do not suffer from water shortages in average years and many growers can actually dry farm their grapes and still achieve optimum quality due to heavy rainfall and storage in the winter.
Calistoga AVA slopes and geologic fans have unique sun exposures.
VINEYARD PERK: The slope to sun exposure angles provide opportunities for optimum vine growth in areas where insufficient light would normally cause vinicultural quality issues. Optimum light during the growing day is critical for the physiological activity of the grapevine.