How to Grow and Care for Diospyros cathayensis Bonsai: Methods and Precautions

In traditional Chinese medicine, Diospyros cathayensis is a very good medicinal material. Beyond that, its ornamental value is also very high, especially when made into a bonsai, it looks even more beautiful. Whenever you see a Diospyros cathayensis laden with fruit, you feel a great sense of accomplishment, but the growing process is extremely difficult. Below we introduce its potted cultivation methods and the precautions to note.

How to grow Diospyros cathayensis bonsai

1. Pot selection: Diospyros cathayensis is best planted in a medium-deep glazed ceramic pot; a purple clay pot or stone pot will also do. Plain, light colors are best, and the pot should not be too deep.

2. Soil: Diospyros cathayensis likes fertile, loose and moist sandy soil. For potting, it is commonly grown in leaf mold or matured garden soil mixed with sandy soil.

3. Potting up: This is best done in spring and autumn. Make sure the bottom of the pot is raised with drainage space so that air and water can pass through well; only then can it grow normally.

4. Watering: Normally the potting soil must be kept moist and must not be allowed to dry out. In the high heat of summer, besides providing appropriate shade, you should also spray and water frequently to increase air humidity, so as to promote good growth.

5. Fertilizing: Fertilize regularly during the growing season. In summer and autumn, increase the application of phosphorus fertilizer to promote flowering and fruiting.

Potted cultivation methods and precautions for Diospyros cathayensis

I. Potted cultivation methods for Diospyros cathayensis

1. Growing site: Diospyros cathayensis likes a ventilated, sunny environment. Plants placed on a rooftop platform have thick branches and leaves and bloom and fruit early. If plants are kept in the gaps between buildings, it is best to place them on a raised platform to allow for ventilation and light.

2. Water and fertilizer management: During the branch-promoting stage of loose growing, use abundant water and fertilizer to help the branches grow quickly and reach the required transition and balance as soon as possible. During the fruiting and display periods, water and fertilizer should be properly controlled, watering only when the soil is dry.

In summer and autumn, water in the early morning before or just as the sun comes up, or in the evening at sunset. Never water when the sun is strong. Apply liquid fertilizer mostly in the afternoon as the sun sets in the west. In winter, water generally around noon or in the afternoon when there is sunlight. In winter, do not water too much or too thoroughly; the potting soil need only be slightly moist, because on winter nights there is often frost and fog, and the potting soil will regain moisture on its own.

3. Repotting and soil replacement: If the roots and branches of Diospyros cathayensis are not heavily pruned, it can be repotted in any season. In places with poor growing conditions, it can be done in spring and autumn. The interval between repotting is generally once every three or four years, and depending on the specific situation it can be done earlier or delayed by one or two years.

When repotting and changing the soil, pruning is generally carried out once. If the roots and branches are pruned too heavily, finally use oxidized deep-layer soil, and after the bonsai resumes growth, maintain it with the method of light fertilizer applied frequently.

II. Precautions

Pest and disease control: Diospyros cathayensis generally has few pests and diseases, but when ventilation and light conditions are poor and the pot is waterlogged for a long time, it is prone to pests and diseases such as leaf scale insects and bark rust. Generally, spraying with Supracide and fenpropathrin solution or improving ventilation and light conditions is enough to control them.

Reasons for yellowing leaves in Diospyros cathayensis

It is very likely that it has been watered too much. Many friends are always afraid that their plants lack water and constantly water them desperately, which actually has the opposite effect. Plant growth relies on the roots absorbing water to sustain the growth of branches and leaves, but the roots also need sufficient air to maintain themselves. When there is more water, there is naturally less air, and long-term waterlogging will leave the roots in a suffocated state, making the plant prone to yellowing leaves. Therefore, we should water appropriately.

How to prune Diospyros cathayensis

1. Prune the root system so that it basically suits the shallower and smaller pot the bonsai will use in the future. Prune the upper branches heavily, keeping only useful branches, to prevent too much evaporation and first keep the plant alive.

2. Find a large pot or plant it directly in the ground; ordinary garden soil will do, but absolutely do not fertilize.

3. Fill the bottom of the pot with 5 cm of soil, then place the trunk stump in, then slowly fill in soil and firm it down.

4. Place it in a spot that is neither fully shaded nor in full sun, and water thoroughly to settle the roots.

5. Then mound moist soil up to the upper part of the stump, leaving only the topmost part where budding is expected exposed. In this way, keep the soil moist and grow the stump for one to two years, during which time shape it in combination with the new buds, pinching off the tips to control height.

It seems that growing Diospyros cathayensis requires attention to technique. You can plant it according to the methods above, which makes it much easier. And if you want your Diospyros cathayensis to grow even better, timely pruning is very necessary. You can prune according to the methods above, and the results are quite good.