When and how should I prune my peach tree?

Pruning a peach or nectarine tree requires a completely different approach from pruning an apple or pear. The timing, the type of wood to remove, and the principle of renewal are all different — and getting them wrong is the most common reason why peach trees either produce no fruit or decline rapidly through disease.

Why peach pruning is different

Apple and pear trees are pruned in winter because they fruit on spurs — short clusters of old wood that persist for many years. Peaches fruit on young shoots produced the previous summer. These shoots carry both leaf buds and flower buds. Once a shoot has fruited, it will not fruit again — it must be replaced by a new young shoot. Pruning in winter and leaving only old wood means there will be no fruit the following season.

The correct timing: summer, not winter

The main pruning of an established peach or nectarine should be carried out in late summer — August to early September in the UK — after the crop has been harvested. This is when the tree closes wounds fastest and when the pathogens that cause bacterial canker and silver leaf are least active in the air. A light tidy-up can be done in late spring after blossom, removing dead wood and any shoots that clearly cannot be tied in.

The renewal pruning system

Each fruiting lateral carries two important buds near its base: one that will grow into a replacement shoot for the following year, and the lateral itself which fruits this year. In summer, after the fruit is picked, cut the fruited lateral back to the replacement shoot just below it. Tie in the replacement shoot — this is next year's fruiting wood. On a fan, also select new shoots to extend the fan or fill gaps, and remove all shoots growing directly toward or away from the wall.

What to remove in summer

Remove shoots that have already carried fruit (unless keeping a small stub for replacement), shoots growing into the wall or directly outward, crossing shoots, and any watersprouts growing from the main framework. Rub out buds growing toward the wall before they develop into shoots in late spring. Do not prune more than a third of the live wood in any single season — the shock can trigger excessive regrowth or stress the tree.

Tools and wound care

Always use sharp, sterilised secateurs and loppers. Sterilise between trees and between cuts into diseased wood with 70% alcohol or a 10% bleach solution. Seal all cuts larger than 1 cm with pruning compound. Make angled cuts just above a healthy outward-facing bud, not leaving stubs and not cutting so close that the bud is damaged.