The Concolor Fir (or White Fir) is similar in appear- ance to the Colorado Blue Spruce, meaning it is a very attractive tree with a medium greenish blue color. They are fast growing, can grow as high as 150 feet and live over 300 years.
They are widely used as ornamental trees and thrive all over the Eastern US, and grow naturally from the Rocky Mountains all the way to the West Coast.
The Concolor Fir has softer needles about an inch long, and produce a pleasant aroma. It's cones are about 4 inches long on average, and point up instead of down as with other evergreens.
Concolor are somewhat shade tolerant, and grow on both moist loamy soils and drier sandy soils.
Douglas Fir established themselves as the primary Christmas Tree in the US early in the 20th century, and are still widely used as Christmas trees. Today they are almost universally harvested from tree farms, and not from the wild.
They grow rapidly, and can reach heights of over 200 feet during a lifespan which can surpass 1,000 years. Douglas Fir feature soft gray-green to blue-green needles, which carry a very pleasant aroma when cut or crushed.
They can survive fires due to their thick, nearly impregnable bark, and do well in somewhat wetter sites.
Prefers full sun.
The Fraser Fir has classic looks, featuring short, soft, dark-green needles with silver undersides revealed by upturning branches. It is a beautiful ornamental, and is widely considered the finest Christmas tree in North America.
The Fraser grows to a maximum height of 80 feet, and will flourish in fertile, rocky & sandy soils which are slightly acidic. In any case, they must have good drainage. They are somewhat tolerant of shade, but prefer full sun. A good rule of thumb is to plant them from Tennessee north, but you can also plant them in areas of higher elevation.