Watering should follow the principle of dry rather than wet, avoid standing water for a long time, so as not to cause rotten roots. Water shortage can be seen from the leaves. If the leaves close slowly and are listless, it is necessary to replenish water. Thin liquid fertilizer or compound fertilizer can be applied once in 20-30 days to promote plant growth.
Spring and autumn is the main growth period of Pinus koraiensis. It should be given enough light and water. If the sunlight is not enough, the plant will grow in vain, the distance between leaves will be lengthened, and the compact plant type will be lost, which will not only affect the ornamental, but also easily break because the branches are too brittle and not full.
The Pinus koraiensis growing in sunny place has compact plant type, thick fleshy leaves and high ornamental value.
The leaves are easy to be absent. During the slow seedling period, they can be planted in the moist soil, placed in the bright and ventilated place (1-2 weeks), and then gradually increase the light.
For the vigorous growth of Pinus koraiensis, the basin can be changed once a year in autumn. When changing pots, the decaying branches and roots shall be cut off, and the excessively long roots shall be cut short to promote healthy new roots.
The new plants were put in the place without direct sunlight for a week or so to promote the recovery and development of root system.
In order to maintain the natural beauty of the plant, it is necessary to cut the dense and disordered branches, especially the new branches at the base.
The pruned branches can be used as cuttings for propagation.
In summer, the pines are afraid of heat. The light is too strong, too hot and too stuffy. They are very easy to dry to death. When they are dormant, the leaves on the top of the plants will slowly close. They can be placed in a cool place with good ventilation and no direct sunlight for maintenance. Pay attention to the control of watering to avoid rain, especially long-term rain, so as to prevent the plant from rotting and dying.
In winter, when the temperature is not lower than 10 ℃, the Pinus bungeana can continue to grow. In the sub zero area, the basin soil should be kept dry, and the dormancy in winter is not obvious in summer.
