Home gardeners can effectively thin peach trees by hand.
Pruning a peach tree opens up the tree and allows sunlight to shine on the fruit.
The goal is to create a tree that has a V-shaped profile with an open center.
This is important for healthy fruit production. If you’re going to spray your trees for diseases or pests, an open tree helps with equal coverage.
Peach twigs can be killed in one growing season by too much shading. Pruning Peach Trees - Aggie Horticulture.
Don't pick the peaches until they are fully ripe.
In the first year select three to four limbs distributed evenly around trunk. Leave small branches on these limbs for early fruiting and sunburn protection. Head limbs half their length, should be". At the second year select one or two limbs on each primary. Head these back to ½ their length (").