We usually begin grape phenology on April 1st, but since development is a bit early this year, we began earlier.
GDD base 50 accumulation count begins April 1 in this resource. We will calculate the March data by hand and add it to our April 1 count http://agebb.missouri.edu/weather/reports/gddTable.asp
Phenology stages according to the Modified E-L system http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf
N Norton E-L Stage 2 Bud scales opening
G Norton E-L Stage 2 Bud scales opening
G Cabernet Sauvignon E-L Stage 2 Bud scales opening
MVEC Delaware E-L Stage 2-3 Bud scales opening to Wooly bud +- green showing
MVEC Valvin Muscat E-L Stage 2 Bud scales opening
MVEC Sunbelt E-L Stage 3 Wooly bud +- green showing
MVEC Chambourcin E-L Stage 2 Bud scales opening
W Catawba E-L Stage 2 – 3 Bud scales opening to Wooly bud +- green showing
NWV Arandel E-L Stage Stage 3 Wooly bud +- green showing
NWV Aromella E-L Stage Stage 3 Wooly bud +- green showing
R Seyval Blanc E-L Stage 3 Wooly bud +- green showing
R Catawba E-L Stage 2-3 Bud scales opening to Wooly bud +- green showing
F Vignoles E-L Stage 1 – 2 Winter bud to bud scales opening
F Chardonel E-L Stage 3 Wooly bud +- green showing
F Traminette E-L Stage 1 – 2 Winter bud to bud scales opening
F Cayuga White E-L Stage 3 Wooly bud +- green showing
D Concord E-L Stage 2-3 Bud scales opening to Wooly bud +- green showing
D Vivant E-L Stage 1-2 Winter bud to Bud scales opening
D Vidal Blanc E-L Stage 1 – 2 Winter bud to Bud scales opening
D Mars E-L Stage 2-3 Bud scales opening to Wooly bud +- green showing