The unfavorable period is late spring and early summer because.

Suppose you need to trim the spruce 3 feet above the ground.

Sep 21, Like many pine trees, the Colorado blue spruce is a naturally cone-shaped variety. The blue spruce does not need pruning for artificial shaping, as it has a naturally pleasing shape already; instead, it is usually pruned to remove diseased limbs. Select the proper tools for cutting individual branches. Lopping shears are appropriate for branches less than 1 inch in diameter; pruning saws.

The blue spruce tree's slow growth makes it mostly intolerant to heavy pruning.

In order to promote a positive response, the blue spruce must have enough time to repair itself before entering its dormant period. Always complete this tree's pruning during the late winter or early spring months, just before the onset of its growing season.