Also known as white fir, concolor has long needles, a bushy appearance and can range in colour from a sage green to a soft blue.
Fraser have deep green short needles with white undersides, sturdy branches and can be more open and less dense.
Grands have glossy green needles with feathery branches. They tend to be somewhat wider and bushier in shape overall.
Medium size needles, and a citrus fragrance, doug fir (not a true fir) can be bushy or open depending on how they have been pruned.
Scotch (or Scots) pine have long needles in bottle brush formation and can be quite bushy. Somewhat spiky, they are great trees for households where pets are an issue.