April 23, 2026 GDD base 50 = 271 . We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System https://door.extension.wisc.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf   E-L Stage 12 5 Leaves separated; shoots about 10 cm long; inflorescence clear   E-L Stage 13 … [Read more...] about Grape Phenology and GDD accumulation

GDD base 50 = 130 . We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System https://door.extension.wisc.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf E-L Stage 4 Bud Burst Genomics NC-6 E-L Stage 9 2 to 3 leaves separated; shoots 2-4 cm long E-L Stage 11 4 Leaves … [Read more...] about Grape Phenology and GDD accumulation

April 6, 2026 GDD base 50 = 77 . We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System https://door.extension.wisc.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf E-L Stage 2 Bud Swell E-L Stage 3 Wooly Bud E-L Stage 4 Bud Burst E-L Stage 7 First leaf separated … [Read more...] about Grape Phenology and GDD accumulation

Grape Phenology and GDD Accumulation While we do not typically start phenology and or officially start tracking Growing Degree Days in our area until April 1st, we have had unually warm weather and our grapes have starting breaking dormancy. As a result, we started tracking phenology a little earlier this year. GDD base 50 = N/A  . We track GDD at … [Read more...] about Grape Phenology and GDD accumulation