Pruning can be carried out from the time when the walnut tree germinates to the time before the leaves are displayed. After the temperature continues to rise, the nutrients stored in the roots are transported upwards and the nutrients begin to transform. At this time, trees need more nutrients. If you trim at this time, color bleeding will occur.

Moreover, it will lose a large part of nutrients, weaken the tree vigor, reduce the fruit setting rate, affect the yield, reduce the quality, and then reduce the income. If it is a fruitless tree, or a tree that grows too vigorously, pruning at this time can control the growth well, weaken the tree potential and bear fruit early.

When the temperature fluctuates up and down at 0℃, sometimes bleeding does not occur, and when the temperature is stable above or below 0℃ for a long time, bleeding appears slight or does not occur. It can be seen that according to the actual situation of temperature and climate every year, it is feasible to prune the middle branches at the favorable opportunity in winter, but we must seize the key period.

Extended data:

The growth of walnut has a great demand for nutrition. When the soil is cultivated, the base fertilizer is applied, and the base fertilizer and the soil are fully mixed and stirred together to enhance the soil fertility.

In the later stage, topdressing should be appropriate according to the growth of trees, weather changes and soil nutrient levels. Fertilization cannot directly pour fertilizer into the pit. Be careful to mix well with the soil, which may burn the roots.

Watering must be done. After planting, the roots should be watered once, and the water should be supplemented after each fertilization to promote the absorption of fertilizer nutrition by the roots. Walnut is a water-loving crop. Ensure the water needed for the growth of walnuts, and replenish water in time under the condition of continuous drought.