Quantcast

When to stop accumulating GDD's

Wine Making Talk

Help Support Wine Making Talk:

bhoenisch

Junior
Joined
Sep 8, 2014
Messages
20
Reaction score
1
Most growing degree day references for grapes seem to use April though September or October as a standard. Here in Great Falls, MT we had our first frost/hard freeze on September 13th with a minimum temperature of 27F. My vines range from this years propagated and planted cuttings to mostly 2nd year vines and a single 3rd year Valiant. All are various cold Hardy hybrids. Many but not all leaves were fried by the cold. I really did not have much of a crop but was wondering if this is where I should stop accumulating growing degree days and call it a season or if any additional heat units would have any effect (if I did have a crop). I'm mostly wondering so that I can keep good records for reference I future years. ImageUploadedByWine Making1473917207.028041.jpg
 

GreginND

Super Moderator
Super Moderator
Joined
Mar 18, 2012
Messages
3,677
Reaction score
2,027
Location
Fargo, ND
Once the leaves are toast, there is no more energy going to ripening. Any grapes should be harvested asap.
 

Latest posts

Top