Joe Rasmussen recorded grape phenology last Thursday when I was in Wisconsin (thanks Joe!) The growing degree days are listed through today, whereas the data was recorded 5 days earlier. GDD base 50 accumulated since April 1 = 971 (+167 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp Phenology stages according to the … [Read more...] about Grape phenology and GDD accumulation (6/9/11)