In nature, you’ll see several types of spruce trees (Picea spp.) that are beautiful, rugged evergreens capable ... Nigra ...

Like the trees that produce them, bristlecone needles are long-lived; they last up to 30 ... In such periods, the species can go almost dormant. "There is something a little fantastic," wrote ...

Species and variety of evergreens you choose ... years for a full-size Christmas tree at about 4 1/2 feet. It features a pyramidal form with soft, blue-green needles. Branches are used as holiday ...