GDD base 50 = 83 at http://agebb.missouri.edu/weather/reports/gddTable.asp
Phenology stages described according to the Modified E-L System http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf
Due to the freeze on April 18, I have taken photos of the buds, but did not evaluate the stages. I will be looking at the number of primary buds/shoots that survived as well as secondaries beginning to grow in the next several weeks. Later on I will resume recording the stages.