The orchard schedule in this post includes fruit thinning. Pest control, increased watering, soil amendments, and mulching were covered in Spring and Dry Summer Gardening Priorities Part 1.
Impact of Fruit Thinning on Fruit Size
Fruit thinning is an essential aspect of orchard management that backyard gardeners rarely practice, but it is crucial for pest and quality control.
Fruit thinning produces larger fruits. For example, the smaller lemons grew as clusters of six fruits per spur, while the larger fruits were thinned to two per spur on the same tree.
The prolific heirloom peach variety needs fruit thinning due to many close-together fruits. The peaches in this picture are the same age as the well-spaced ones below but remain smaller due to the larger numbers.
Crowded Fruits
Crowded fruits are prone to pressure damage. Pressure and injury sites will allow water or moisture stagnation, leading to mishappen, discoloured, diseased or rotten fruits. It also becomes a hiding place for pests. In addition, when fruits grow in clusters, they all take up evenly distributed nutrients, resulting in smaller fruits with uneven ripening, which may be prolonged.
Naturally Spaced Fruits
Some commercial fruit varieties produce less crowded flowers, so they naturally have well-spaced leading to larger well-shaped fruits and less labour for fruit thinning. Therefore, these varieties may be preferable for small gardens maintained by part-time gardeners.
Removing some of the tightly packed fruits while still small allows the remaining fruits to grow larger and develop good colouring.
Using Thinned Fruits
Thinned fruits may be used for composting or making preserves if they are large enough to be eaten.
Well-thinned Fruits
The tree is less likely to break when the fruits are heavy. From dormancy, many fruits will develop during spring and summer, especially in temperate trees. Peaches, apples, and nectarines may benefit from fruit thinning.
Well-spaced apples reduce the weight on the branches. As a result, the fruits will double in size by harvest time.
While the smaller fruits along this branch are well spaced, the fruits at the end of the branch need to be thinned to two fruits.
Selecting Fruits to Thin Out
The apple in the middle is the best candidate to remove. This will also reduce the weight on the already weighed-down branch.
Unthinned young apples
Quality Home Grown Fruits
A peach next to an apple for size comparison. Peach and apple next to the sharpener and a large loop earring are included for scale for size comparison.
Both fruits were thinned to two per spur resulting in larger well-shaped and good-coloured fruits. Similar to those found in the malls. However, citruses and plums suffer from fruit and flower drop during the dry summer that may thin them naturally; One of the reasons some oranges grow larger is when there are few fruits on the tree.