Colorado spruce, or blue spruce, is a conical-shaped evergreen with short needles that have a bluish tinge. Colorado spruce grows well in U.S. Department of Agriculture zones 3 to 8. Though loamy soil is preferred, this evergreen does tolerate clay soil. Late summer, such as August, to early fall is suitable for planting. A 6-foot Colorado spruce will most likely have its root ball wrapped in burlap.
Choose a sunny, well-drained location to plant Colorado blue spruce. The location selected should account for the potential growth of the blue spruce, which can spread 10 to 20 feet if not sheared. Contact local utilities to have the area checked for underground cables or pipes.
Measure the height and width of the root ball (the handle of the shovel can be used to measure). Dig the hole twice as wide as the root ball and 1 to 2 inches shallower than the root ball is tall. The root ball should be able to sit on the bottom of the hole with the top of the root ball 1 to 2 inches above ground level. For clay soils, organic matter, like compost or leaf mold, can be mixed into the dirt removed from the hole.
Place the root ball into the center of the hole. Back fill the hole halfway up the sides of the root ball.
Water around the root ball to settle the dirt. Release the wrap around the root ball so the top half of the root ball is exposed. Finish back filling the hole and water again.
Apply 3 inches of mulch starting about 3 inches from the trunk and extending out at least to the tips of the bottom branches. Prune off any branches damaged during planting.
Water every seven to 10 days, spring to fall, during the first year if there is no rainfall.