Growing Degree Days (GDD) is a useful record of how much energy a vine can potentially use to grow, flower, fruit and ripen. The GDD chart shows a cumulative total of GDD throughout the season.

It can be used to follow progress against expected phenological stages, alert to unexpectedly slow development and with a long-range weather forecast, to anticipate future stages.

Use the chart below to see how the vineyard or varietal parcels are progressing against expectations.