Certified GKH Gardening Expert
Do not prune these trees following the harvest. However, they do require annual pruning to help maintain shape, size, and overall health. The best time to prune is in February once the danger of frost has passed but before any fruit has begun blooming. Improper pruning will reduce yield and fruit quality.
Cut out all dead, broken, diseased branches. Remove old wood as well as crossing or rubbing branches. Aim for a funnel-like shape with fruiting branches about 1 foot apart over the top of the tree. Thinning is another way to encourage better fruiting. This article will help with that: https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-thinning.htm