giáng sinh trees have been sold commercially in the United States since about 1850.Until fairly recently, all giáng sinh trees came from the forest.In 2002, Oregon, North Carolina, Michigan, Pennsylvania, Wisconsin, Washington, New York, and Virginia were the hàng đầu, đầu trang giáng sinh cây producing states. Oregon was the leading producer of giáng sinh trees – 6.5 million in 2002.The best selling trees are Scotch pine, Douglas fir, Noble fir, Fraser fir, Virginia pine, balsam fir and white pine. thêm than 2,000 trees are usually planted per acre. On an average 1,000-1,500 of these trees will survive. In...