(1) Yushu doesn't like cold environment, so whenever it enters winter, its growth will gradually slow down until it finally stops growing. At this time, the relatively long branches of Yushu can be pruned properly, and the branches with very dense growth can also be pruned to make them grow less crowded and look beautiful. Of course, there is no need to trim it sharply, which is both beautiful and does not affect the appearance.

(2) Yushu needs pruning after flowering, which can make Yushu grow better in the later period and be more conducive to flowering in the coming year. Yushu blooms in late spring and early summer, and can be pruned about two weeks after flowering. Pruning can be shortened, and it is best to leave 4 ~ 10 buds for better growth in the later stage.

(3) Trim the beautiful shape of Yushu. For flower lovers who are good at flower pruning, pruning the shape of Yushu is a great pleasure for them. Trim the lush Yushu into your favorite shape, enjoy it beautifully, and have a great sense of accomplishment in the future. When pruning the shape of Yushu, cut off the particularly dense branches. In terms of modeling, whether it is a small pile that has just grown up or an old pile with a long tree age, it can be trimmed according to your own habits and hobbies. Old piles can be trimmed into dressing bonsai, which is also very beautiful.

2. What are the planting methods and precautions of Yushu?

(1) To cultivate green Yushu in the conservation environment, we can plant it in fertile sandy soil with good drainage, and then put it in a ventilated and scattered light environment, so that plants can get enough sunshine. When the sunshine is too strong in summer, we need to use a sunshade net to block some sunshine for the green Yushu.

(2) In the process of daily maintenance, it is found that the surface layer of cultivated soil is dry, so it needs to be watered immediately and the soil should be thoroughly watered. When the air is too dry, it is necessary to spray water on the leaves and surrounding areas of the green Yushu to increase the humidity in the air.

(3) In order to make the leaves of Ulmus pumila grow healthily, the leaves are green, and the plants can be fertilized during the growing period. Generally, decomposed organic fertilizer should be applied once every 1-2 months, but the growth of elm is slow in winter, so fertilization should be postponed.