Precautions for potted plants in Pu Shu:

Watering: Pu Shu is dry-tolerant, so it should not be watered too much. It should be watered once a day during the spring growth period, once in the morning and once in the evening when the temperature is high and the light intensity is high in summer, less in autumn, and once every 5-7 days after defoliation in winter.

Fertilization: Insufficient nutrients and fertilizers will make Pu Shu leaves yellow and less shiny, which will affect the appreciation. Too much fertilizer will cause the branches and leaves to grow in vain, and the leaves will be enlarged, which will affect the tree shape, so it is appropriate to control fertilization. Apply thin organic fertilizer 2 ~ 3 times a year in spring and summer, and apply base fertilizer once before winter. Fertilizer is mainly nitrogen and potassium fertilizer

Pruning: Pu Shu has strong germination ability, so it should be pruned and reshaped frequently. When the new branch is 6-8 cm, leave 2-3 leaves and cut off the rest. Leave 1 ~ 2 leaves for the upward or downward elongated shoots, and cut off the rest. At the same time, buds should be picked and shoots should be removed at any time to keep the shape of bonsai in disorder.

turning pots: it should be done every 2-3 years, preferably before germination in February-March in spring, and also in autumn. The roots of pile landscape in Pu Shu are prone to decay. We should combine turning pots, pruning old and weak roots and replacing fertile and loose new soil to promote the development of new roots and maintain the normal growth of plants.

pest control: common diseases in Pu Shu are powdery mildew, which can be controlled by spraying with .5% sulfur mixture. Common pests include red spider, aphid, beetle and psyllid, which can be controlled by spraying 4% dimethoate 15 ~ 2 times or 8% dichlorvos 15 times.