圣诞节 trees have been sold commercially in the United States since about 1850.Until fairly recently, all 圣诞节 trees came from the forest.In 2002, Oregon, North Carolina, Michigan, Pennsylvania, Wisconsin, Washington, New York, and Virginia were the 最佳, 返回页首 圣诞节 树 producing states. Oregon was the leading producer of 圣诞节 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. 更多 than 2,000 trees are usually planted per acre. On an average 1,000-1,500 of these trees will survive. In...
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