By pruning back new growth back to half its original.

Jan 17, Rain within two weeks of pruning can lead to an increase in risk of microbial infections, as wounds provide an opening into the tree for rain- or wind-carried spores. Infections can be slow to grow and may not develop into full-blown canker diseases - or they can be aggressive and rapidly kill pruning fruit trees in wet weather Cecilia Parsons.

Thins the fruit, ensuring consistent cropping year after year.

very high humidity. However, most other fruit and nut trees can be pruned any time enough leaves have fallen to make the tree structure visible. Open Center or Open Vase After planting and heading bare-root stone fruit trees, two options are possible for the resulting shoots.

Either. Jan 19, You would be safe pruning in the winter even if it rains the next day. The second reference said you shouldn't prune during cold periods.

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Apple trees are very hardy and can sustain very low temperatures. A good rule of thumb is that if it is too cold for you to be out pruning, it is too cold for the trees.