Concolor Fir is a native tree from the Western region of the United States of America, but it can grow extremely well anywhere in the country. This open grown pecan trees have massive trunks and oval or rounded wide spreading crowns of branches that extend far down the trunk. This tree is widely used as a Christmas tree over the globe.   Growth Rate: This tree grows at a slow to medium rate, with height increases of anywhere from less than 1-2 feet per year.Mature Size: It can grow up to 30-50 feet in your gardenSoil Preference: