2.1.1.b Implementing pre-pruning

Why do pre-pruning?

Pre-pruning consists of going through the vines early with a pre-pruner to trim the shoots to a specific height.
This saves time when pruning and especially when pulling the branches off the wires after pruning, since the branches come off more easily and are shorter.

The time saved is particularly significant for short cordon pruning (up to 60% faster) but less so for Guyot pruning (up to 10 - 15%). If the vines are braided, this technique can considerably simplify the task, as braiding tends to make the removal of cut branches more difficult, as the upper parts are intertwined.

What is the right height for pre-pruning?

This depends on the type of pruning, but often for pre-pruning to be efficient, the shoots need to be cut below the trellising wire on the first few centimetres of the stake. This will eliminate areas with the most tendrils. It is important to not trim too low, as this could damage the buds that may be used in next year's pruning. It is possible, however, to trim lower when cordon pruning.

What can be done with the pre-pruned wood?

Preliminary pruning is particularly worthwhile if the cuttings can be ground up straight away and left as mulch on the soil, otherwise it is difficult to use them efficiently.