In Ohio this is late February or early March. Prune before buds begin to swell. Regardless of the training and trellising system used, grape pruning terminology should be understood. The main portion of the vine at the base. Trunks usually last for many years.
Some vines have more than one trunk.
The canes left after pruning which will produce fruit shoots and new canes. NODE Thickened portion of shoot or cane where compound bud is located. SPUR Canes pruned to 1 to 4 nodes. Can be fruiting or non-fruiting. Used as a cane for fruiting the following year.