United States improved Hongfeng are breeding horticultural varieties from safflower maple and free people in safflower maple and silver maple Acer Hybrid Breeding of horticultural varieties, collectively, have a number of improved varieties are deciduous tree, height 18 -25M, oval crown, crown 12-15M. Cold resistance, resistance to -35 ℃, adapt neutral and acidic or slightly alkaline soil. Faster growth, the average annual growth of 80cm-120cm (depending on soil and water and soil fertility). At first onset, the upper portion of the tip and leaf margin chlorosis produce water-soaked spots, October brilliant American maple, red maple (Fig. 4) Thereafter As the disease progresses, autumn blaze maple United States, the Ministry of disease appear Kujiao shape, and gradually to the lower part of the blade and internal expansion, the blade half dead. Disease and Health Department of the Ministry of the junction of russet, deep red for the last three-quarters of the entire dead leaf, green leaf base only partly curled tip dead, pale, the whole plant leaves like fire. Since the leaves lose chlorophyll, seriously affecting photosynthesis, the plants grow weak, US Maple, loss of aesthetic value. US Maple autumn leaves performance, mainly depends on environmental factors, such as planting location at high altitude or mountain, large temperature, air humidity is good, so the performance is better. If you are planting in urban areas, due to the heat island effect, it is relatively badly. If planted in the northern high latitudes, autumn will also perform well, contrary planted in the southern low latitudes, will be relatively badly. Even if the same American maple species, changing the planting location, it will be a great difference in its performance. Shandong US Maple US Maple, grand seedlings (view) provided by Weifang grand seedling cultivation base. Weifang Grand seedling cultivation base (www.wfsdmm.com) Shandong Weifang, flowers leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the grand seedlings leadership with the staff warmly welcome all inquiries negotiations to create a better future grand seedlings.