Colorado Blue Spruce
This is one of the most popular trees among people who want living Christmas trees. The color can be blue but is more likely to be silver or gray. It grows in a conical shape naturally and so there is little need for pruning it. It tends to grow in Southern Canada and Northern USA but it can usually be found in most nurseries or retail tree lots.
The Noble Fir has strong branches and stays fresh for a long time. The needles can look silvery although they are blue/green in color. It can be used to make wreaths and other decorations because the branches are so strong.
Douglas Fir
This is one of the most popular Christmas tree in the USA. It tends to be grown in the Pacific Northwest and is shipped all over the country and even to Asia. It has a pyramid shape and smells sweet.
Norway Spruce
This is a conical shaped tree which tends to drop needles easily so needs to be keep very well watered. It is dark green in color.
Virginia Pine
This tree has short soft needles and stout woody branches and is conical in shape. It is good for holding ornaments but the dark green needles can turn yellow in late fall which means it needs a tree colorant to keep it green. It is popular though and was originally the main tree for offer in the south east USA.
Eastern White Pine
This tree has a really nice cone shape and soft needles. It is blue or silvery green in color but the branches are not that strong so heavy ornaments do not work that well. The tree can turn yellow if it is old and so tree colorants may need to be used. It does not have much of a smell and therefore is less likely to cause an allergic reaction.
Arizona Cypress
This tree is commonly found along the east coast of south and south west areas of USA. It tends to be in cut-your-own places and has a lovely smell. It is tall and thin and and is pale green or gray green.
Scotch Pine
The color can vary quite a bit from bright green to dark green and even sometimes a blue green color. The branches are strong so great for hanging heavy decorations and the needles do not drop very much. It stays fresh for a long time. It also has a nice conical shape.
Eastern Red Cedar
This tree can dry out quickly which is why it tends to be sold at cut-your-own farms. It has a pretty cone shape and the colour varies from dark green to purple.
Fraser Fir
This is a strong tree which can hold heavy decorations and it grown in North Carolina. Its strength means that the branches are often used to make wreaths and other decorations. It keeps its needles well and they are dark green or even blueish on the top and silvery underneath. It has a nice smell and it is for this reason as well as the nice color which makes it one of the most popular trees.
Leyland Cypress
This tree is not fragrant and is often used as an ornamental landscape plant in England and South East USA. However, it has recently become more popular as a Christmas tree in this area of the USA. It is dark-green to gray in color and is a cone shape.
Balsam Fir
This tree is a pyramid shape and dark green. The needles tend to stay on the tree for a very long time and it has a nice smell. It is very popular in Canada as well as North USA.
Source : http://www.freechristmaswallpapers.net/blog/christmas-tree-types/
