1, elm has strong drought resistance, so the soil should not be too wet in the ordinary life of elm basin, but when the temperature is high in summer. Reasonable watering and fertilization can make bonsai grow better. The principles of watering elm and bonsai are: wet and dry watering, alternating wet and dry, dry pots or too much water.

2, give enough light: Elm likes light, so to make it longer, we must put it in good lighting conditions. However, it should be noted that if the light is too strong, you need to do a good job of shading to avoid burns.

3. Reasonable pruning will make the elm more beautiful. Elm grows very vigorously. To maintain its beauty and ornamental value, it is necessary to do a good job of pruning. In the general pruning work form, in autumn, there is no disease of cutting off branches and then pruning.

Extended data:

There are several reasons for the yellowing of elm bonsai leaves:

1, the environmental temperature of elm growth is too low, which leads to the appearance of physiological yellow leaves, while normal new leaves and old leaves appear alternately, and the situation of yellow leaves is not obvious.

2, too much water, and poor drainage of flowerpots will cause root rot and yellow leaves. If this is the case, then you must loosen it immediately and control the amount of watering. It is impossible to fertilize the roots in a short time; More seriously, the basin needs to be changed; If the roots are all dead, they are hopeless;

3. Too little light makes the elm bonsai appear yellow leaves, which is why the yellow leaves come. We just need to give enough light to solve the problem of yellow leaves.

4, fertilization work is not in place, and sometimes improper fertilization leads to the lack of some necessary trace elements in the growth of elm bonsai, resulting in yellow leaves and lack.

Positive tree species are light-loving, drought-tolerant, cold-tolerant, barren-tolerant and adaptable. Developed root system, strong wind resistance and soil conservation. Strong germination and pruning resistance. Fast growth and long life. Resistant to dry and cold climate and moderate salinity, but not to water and humidity (resistant to rainy season waterlogging). It has anti-pollution and strong dust retention ability for leaves.

References:

Baidu encyclopedia-Yushu