Gardening experts have warned that careless pruning of fruit trees can damage their health and cut future harvests, according to specialists cited by the Martha Stewart website.
Pruning an orchard can seem like a lot of work, but it brings real benefits, including better air circulation and sunlight access that boost yields. Experts say there is a specific set of pruning rules, along with several common mistakes gardeners should avoid.
Starting with the right tree
One common mistake happens before anyone even picks up a pair of secateurs, buying a two or three year old fruit tree instead of a one year old sapling. Shaping a tree needs to begin from its very first year to build the right structure.
Kate Schneider, founder of the company Ibis Coastal Landscapes, said young, unbranched trees between 1.2 and 1.8 metres tall tend to establish better and allow gardeners to shape their structure from the start.
Why pruning at planting matters
Many people hesitate to prune a newly bought fruit tree heavily, but Schneider said pruning at planting time is essential to build a strong, productive crown.
She said the tree should first be cut to about 60 to 75 centimetres from the ground to encourage new scaffold branches, which will form the tree's framework. She added that to help the tree grow well and spread outward, gardeners should choose four or five well-positioned branches with wide branching angles and shorten their length by about a quarter.
Disinfecting tools and avoiding over-pruning
Experts stressed that tools must always be disinfected during pruning, otherwise there is a risk of spreading disease between trees. Ward Dilmore, founder and head landscape designer at Petrus Landscaping, recommends keeping a spray bottle of alcohol on hand to disinfect tools before moving on to the next tree.
Gardeners should never remove more than a third of a tree's crown when pruning. Heath McCarty, an arborist at the Dawes Arboretum, said removing too much of the crown can stress the tree or reduce its yield.
Heavy pruning of a fruit tree in the middle of summer, during the hottest weather, can also cause excessive stress. Experts said it is better to prune in winter and early spring instead.
Pruning techniques for different fruit trees
Different fruit trees need different pruning approaches. Schneider said apple, peach and pear trees all require a specific approach, so it is important to follow pruning guidance suited to the particular variety being grown. Peach trees, for example, are usually pruned in the centre to improve light and air circulation through the crown.
Trees should not be pruned with a flat horizontal cut. Angelica Zaber, a gardening expert with the company Online Turf, said an angled, downward cut allows water to drain quickly away from the cut, which lowers the risk of fungal infections caused by water pooling on the wound.
Building a mental picture of the finished tree
Specialists say pruning fruit trees can seem like a complicated science, but it becomes easier to understand if gardeners picture the tree's future shape in their mind and work gradually toward that goal. Most often, the goal is a strong framework of branches, good sunlight exposure and healthy air circulation.
Some gardeners consider pruning peach trees optional, but experts warn this can worsen the tree's condition, lower its yield and encourage disease. Without pruning, the plant puts more energy into growth than into producing large, sweet fruit, meaning peaches end up smaller, the harvest shrinks and picking becomes far more difficult.
