Why summer pruning is the secret to better stone fruit yields
In short: While winter pruning builds a tree's structure, summer pruning is about control. By pruning during the active growing season, you can manage a tree's size, improve airflow, and ensure your harvest is large, high-quality, and easy to net.
Summer pruning serves a different purpose than winter pruning. While winter work focuses on establishing a young tree's basic structure or adjusting a mature tree's shape, summer pruning is designed to inhibit growth. This control is essential for maintaining a manageable size for harvesting and netting, and it allows stone fruits like apricots to heal more effectively while they are still in their active growth phase.
To prune successfully, hygiene is paramount. Tools like secateurs and loppers must be sharp to avoid tearing branches and clean of fruit sap to prevent spreading diseases. Using methylated spirits to clean tools between different trees is a recommended way to mitigate infection risks. It is also vital to identify fruit spurs—clustered rosettes of buds—to ensure you do not accidentally prune away your future harvest.
Effective summer pruning involves several specific actions. First, remove any dead, damaged, or diseased branches, along with any limbs touching the ground. To prevent pests and diseases, trim away inward-facing branches that obstruct airflow in the tree's center. You should also cut back long, vertical growth to make netting easier, and consider 'singulation'—removing one side of a divided, thin branch—to reduce the risk of breakage and produce larger fruit.
Timing and weather are critical factors for success. Pruning should ideally occur during dry weather to minimize the risk of fungal infections like silverleaf or bacterial canker. Because their development decelerates, pruning for certain types such as apples and pears is frequently postponed until late summer—generally late July or early August for pears, and from early to late August for apples.
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- Summary by Intellect · source: How to prune stone fruit trees in summer
- Also: How to summer prune trained stone fruit trees
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