We are setting April 1 as the day to begin counting Growing Degree Day accumulation base 50 at Mountain Grove. We will use the reference site at http://agebb.missouri.edu/weather/reports/gddTable.asp which lists the Mountain Grove weather station (http://www.weather.com/outdoors/agriculture/growing-degree-days/65711 as a backup). Phenology will be noted according to the … [Read more...] about Grapevine phenology and GDD accumulation