Suitable for potted soil. Potted apple trees should be cultivated in large flowerpots to make them have enough space for root growth, and the mixed soil of field soil, humus soil and farmyard manure with a ratio of 6:2:2 should be selected to keep the soil loose, ventilated and well drained.
Rational fertilization. In the cultivation technology of potted apple trees, we should pay attention to rational fertilization, add nitrogen fertilizer in early spring to make them sprout new buds better, add phosphorus and potassium fertilizer in flowering and fruiting period, generally fertilize once a month, and pay attention to the dilution of fertilizer to provide sufficient nutrients for apple trees.
Water it properly. Potted apple trees should be properly watered. Water apple trees once every 1 ~ 2 days in spring and autumn, and twice a day in summer to keep enough water. Do not water too much, which will lead to water accumulation and rotten roots.
Trim the branches and leaves. Pay attention to the pruning of branches and leaves when cultivating. First of all, we should cut off the long branches and dense branches of the tree to make it loose and maintain a good plant shape, and also cut off many branches, diseased branches and weak branches, so that the nutrition of the apple tree will not be consumed and its healthy growth can be promoted.
Pest control. When apple trees are potted, we should also prevent and control pests and diseases. During dormancy, the fallen leaves should be swept away and burned in time to keep a healthy growth environment, and carbendazim or thiophanate-methyl solution should be sprayed regularly to control germs to avoid the impact of diseases.
2. Attention should be paid to water and fertilizer management for potted apple trees, because watering potted apples is the main factor that determines the yield and quality. Generally, water should be supplied according to the weather changes until it is dry and wet. Never water it or water it repeatedly, so as to avoid diluting the nutrients in the basin and wasting manure or retting the roots.