Cold Hardiness Update

Daily maximum and minimum temperatures recorded at the Western Colorado Research Center – Orchard Mesa near Grand Junction, Colorado, and critical temperatures for a 10% bud kill (LT10) estimated from Table 2. The dashed lines represent predicted values for LT10 based on curves fitted to previous years’ data. Temperature data for various locations within the Grand Valley can be found at http://www.winecolorado.org/colorado-grape-growing/weather-station-network/. Meteorological data from other locations throughout Colorado may also be available from the Colorado Agricultural Meteorological Network – COAGMET.

Fig. 3: Daily maximum and minimum temperatures recorded at the Western Colorado Research Center – Orchard Mesa near Grand Junction, Colorado, and critical temperatures for a 10 % (LT₁₀), 50 % (LT₅₀) and 90 % (LT₉₀) bud kill for varieties ‘Chardonnay’ and ‘Syrah’.