Scots pine grows in USDA hardiness zones 2 to 9. Considered a slow grower, Colorado Blue Spruce, Picea pungens, can reach Christmas tree size in five years at 5 feet tall when started as a 2-foot ...
In warmer zones, the glossy dark green leaves may remain ... There are a few different varieties of spruce trees, but the blue spruce (Picea pungens), also known as Colorado blue spruce, is ...