GDD base 50 = 2695. We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf
Chambourcin and Norton are fully colored. We are harvesting the majority of the grapes for distillation due to the spring freeze injury impacting the fruit harvest dates and maturity levels.