First, what to do. 1. Pile raising: pile raising preparation before bonsai. Pile-raising refers to planting the newly dug elm stump in wet sand after treatment, or planting it in a soil basin filled with wet sand for maintenance, so that the stump can take root and resume growth. 2. Pruning: At this time, pruning is mainly aimed at dead branches, diseased branches and roots. Especially when pruning the roots, the problematic parts should be trimmed clean. Then apply some erythromycin ointment to the wound to help it heal. If there is too much sticky juice in the wound, you can apply ointment, sprinkle a layer of fine sand, and then seal it with plastic film, and you can recover. 3. Potting: After the plant grows again, it will maintain the pot normally. 4. Modeling: After the plants survive, the modeling can be trimmed. According to the basic morphology and growth of plants, bonsai forms such as straight stem type, inclined stem type, bent stem type, cliff type, jungle type and attached stone type are selected. In addition, in the growing period, it is necessary to cut off branches that are too long and messy to keep the branches beautiful. Can small elm seedlings be made into bonsai? Small elm seedlings have strong germination ability, pruning resistance, fast growth and long life, and are good materials for making bonsai. Ye Gang is the best viewing time for small elm seedling bonsai. The ornamental value of elm bonsai can be improved by removing all the old leaves in mid-August, strengthening water and fertilizer management in the later period, and growing new leaves in the middle and late September.