They are a "blue" variety of Noble Fir. They are 5 years old right now and will be ready in another 5 or 6 years. We will harvest most of them at what they call a 6/7, between 6' and 7' cut height.
Everyone around here grow Christmas Trees. If you buy a Noble Fir Christmas Tree there is a very good chance it was grown within 25 miles of my house!