Elm bonsai generally began to shed leaves in June+10 in 5438. As a deciduous tree, it is normal to shed leaves in autumn, but it is not normal to do so on a large scale during the growing period. Check whether the plants have diseases and infections, and check whether the roots are rotten. If the roots have rotted, take the plants out of the pot in time and trim the roots properly.

Maintenance method

1, substrate selection: general soil can meet the requirements of Ulmus pumila because of its strong adaptability. It likes fertile soil with good drainage, and generally uses manure and peat soil mixed.

2. Lighting management: Yu Qian likes plenty of sunshine, and the daily illumination must reach more than 8 hours, otherwise the growth will be slow, which is not conducive to Qian's growth.

3. Nutrient management: Ulmus pumila consumes too much in the key growth period and needs to be supplemented with nutrients. The cake fertilizer is applied once every 15 days, and a certain amount of nitrogen, phosphorus and potassium fertilizer is added. Applying phosphorus and potassium fertilizer once in winter can make elm have cold resistance and survive the winter smoothly.

4. Water management: Yu Qian doesn't like humid environment. The temperature is high in summer, so water can't be given at will. The soil is slightly dry, which is beneficial to plant growth. Excessive humidity will lead to root rot.