Spur pruning is suitable for many grape varieties, although it often fails in older varieties or very vigorous, young plants. They will produce abundant foliage but no fruit, because the buds close to the stem have no fruiting buds. In this case the spurs need to be pruned slightly longer, ie with 3 - 5 eyes, or else change to Rod Pruning.
The following diagrams illustrate the training and pruning based on a selected side shoot position over several years. Spaced approx. 25 - 50cm apart are numerous other side shoot positions arising from the trained main stems (Diagram 00). Within the frame (red) the stem wood (dark brown) in the left bottom corner grows obliquely. The spur pruning described below is not influenced by that, and the diagrams also apply to vertical or horizontal stems.
The diagrams in the column to the left illustrate the side shoot position after leaf fall in winter, and Pre- Pruning of the old wood (dark brown). These canes have been summer pruned, otherwise they would be much longer now. Each cane produced approx. 1 - 2 grape bunches in summer. The diagrams in the central column depict the pruning of the fruiting canes into the wood from the previous year (ochre); the diagrams in the column to the right show the results.