1. Soil: the requirement of Ulmus pumila on soil is not high. It can grow in acid, alkaline and neutral soil. Bonsai culture, you need to use loose and fertile neutral soil, so it is conducive to its growth.
2. Light: it needs to receive long-term light. Potted plants can be placed indoors in the sun, and they are very sun resistant, even if they are exposed to strong light.
3. Watering: small leaf elm prefers humid environment, so it should be watered more frequently. Generally, it needs to be watered once or twice a day in summer, once a day in spring and autumn, and once every two days in winter. In addition, you can spray water on the leaves everyday to keep them moist.
4. Fertilization: the growth period of Ulmus pumila is from April to October, which requires sufficient nutrients. Generally, fertilizer should be applied every 15 days, and organic fertilizer rich in nitrogen, phosphorus and potassium should be selected.
The seeds of Ulmus pumila are not easy to obtain. They are usually propagated by cutting, and the survival rate is between 20% and 40%. Select 1-2-year-old branches, the length is about 7-8 cm. Dip in indole butyric acid at the bottom of the branch to promote its rooting, and then wash it with water. Select the soil with good drainage and air permeability as the substrate, insert the cuttings into the substrate, water and put them in the sunny place. It is necessary to spray water around frequently to keep high humidity.
1. Diseases: the common diseases are root rot and slightly clumped branches. Root rot can cause yellow leaves to fall off and branches to die. It is necessary to take out the plant and trim the damaged roots. After applying bactericide, plant again. WITCHES'BROOM mainly damages new leaves and leaves. It is necessary to cut off and burn the diseased leaves and spray the mixture of sulfur and stone.
2. Insect damage: there are many insect damages, such as scale insects, longicorn, moth, etc., which are harmful to the small leaf hammer and elm.
