Chinese Hackberry Bonsai Care Management and Appreciation Guide
(1) Care Management
Placement: Chinese hackberry (Celtis sinensis) likes light, and is generally best placed in a spot with ample sunlight and good air circulation; no shading is needed in summer. In the Yangtze River basin area, it can be kept outdoors over winter, with the pot buried in sun-facing soil to prevent the potting soil from freezing.
Watering: Chinese hackberry is drought-tolerant, so watering should not be excessive. During the spring growing period, water once a day; in summer, when temperatures are high and light is intense, water once in the morning and once in the evening; in autumn, watering should be on the sparse side; after leaf fall in winter, water once every 5-7 days.
Fertilizing: Insufficient nutrients and fertilizer will cause the leaves of Chinese hackberry to turn yellow and lose their luster, affecting the display. Too much fertilizer will cause excessive growth of branches and leaves and enlarged leaves, affecting the tree's shape, so fertilizing should be controlled. Apply dilute organic fertilizer 2-3 times each spring and summer, and apply base fertilizer once before the onset of winter. Nitrogen and potassium fertilizers are the main types used.
Pruning: Chinese hackberry has strong sprouting ability and should be pruned and shaped regularly. When new shoots grow to 6-8 cm, keep 2-3 leaves and cut off the rest. For buds and branches growing upward or downward, keep 1-2 leaves and cut off the rest. At the same time, buds and tips should be pinched off at any time to keep the bonsai shape from becoming unruly.
Repotting: This should be done once every 2-3 years, preferably in spring from February to March before budding; autumn is also acceptable. The roots of Chinese hackberry bonsai are prone to aging and decay, so when repotting, prune the old, weak and damaged roots and replace the soil with fertile, loose new soil; this will promote the development of new roots and maintain normal growth of the plant.
Pest and Disease Control: A common disease of Chinese hackberry is hackberry powdery mildew, which can be controlled by spraying 0.5% lime sulfur mixture. Common pests include red spider mites, aphids, jewel beetles, and psyllids, which can be controlled by spraying a 1500-2000 times dilution of 40% dimethoate or a 1500 times dilution of 80% dichlorvos.
(2) Appreciation
The Chinese hackberry has an ancient, elegant and unrestrained posture, with rough, mottled bark that does not split, a tall and straight trunk, and gracefully spreading branches. In spring, new leaves first emerge, covering the branches in tender green; in autumn, the leaves turn deep yellow, making it highly ornamental. In winter, when the leaves have almost all fallen, it can be appreciated as a cold-season tree. Using an old tree stump, with exposed roots and bent trunk, gnarled and ancient-looking, and green leaves trailing on the branches, layered and towering in verdant hues, it is rich in the wild charm of mountain forests.