“Pruning and training are perhaps the most important cultural management practices for grapes. A thorough understanding of the concepts of pruning severity and crop load is critical to sustained production of high-quality fruit.”
There is no training system that works perfectly for all climates and settings, and it is often true that a variety of methods will get the job done. Still, here in Maine, there are definitely some unique factors to consider and some methods that are clearly better than others.
|Vertical Shoot Positioning Training (image from rieslingrules.com)|
We then run 3 sets of double strands of wire, also known as catch wires. Catch wires hold the vines and allowed them to be tucked, rather than tied, into position.
For an excellent overview of various training systems see this presentation below: