Mature size the colorado blue spruce grows to a height of 5075 and a spread of 1020 at maturity. The colorado blue spruce is such a delight that nature seems to have kept it a well-guarded secret for a very long time. These coniferous evergreens grow in a range of shapes and sizes, from 50-foot-tall trees with pendulous. This tall, skinny specimen fits easily into spaces too narrow for most evergreen trees. This fastigiate -form colorado spruce has a formal look suitable for neat, manicured landscapes, and though its tightly branched, stand -at-attention habit makes it seem as if its been meticulously pruned, your shears will never leave the shed. The blue spruce, green spruce, white spruce, colorado spruce, or colorado blue spruce, with the latin (scientific) name picea pungens, is a species of spruce tree. It is nativeto north america, and is found in growing zones 1 through 7. Its natural range extends from northern new mexico through colorado and utah to wyoming and into alberta and british columbia, but it has been widely introduced elsewhere and is used as an ornamental tree in many places far beyond its native range. The dwarf alberta spruce is diminutive evergreen with a classic pyramidal christmas tree shape. This spruce variety is related to some giant varieties that can grow 100 feet or taller but because dwarf alberta spruce rarely exceeds about 13 feet, it is a popular choice for foundation plantings and as a specimen plant all over america. Slower growing than the native colorado spruce, this semi-dwarf selection is useful for smaller landscapes and confined spaces. Dense, eye-catching silvery blue-green foliage holds its color well. Growing only a few inches per year, it develops a broad, pyramidal form. Baby blue spruce hardiness thanks to its mountain heritage this is quite a robust tree and it can be successfully grown in usda plant hardiness zones 4 to 7. This makes it suitable for almost anywhere in the rockies (unsurprisingly), all but the very northern parts of new england and the midwest, and much of the eastern seaboard down to south carolina. Picea pungens fat albert is quite common and very popular in the nursery trade. It is a vigorous, densely compact, broadly pyramidal selection of colorado spruce with nice, bright-blue needles. A mature specimen will measure 10 to 15 feet (3 - 5m) tall and two-thirds as wide after 10 years in the landscape, an annual growth rate of about 1 foot (30 cm).