While evergreens such as blue spruce don't require extensive pruning -- the plant doesn't grow continuously and doesn't require much maintenance -- it's best to prune blue spruce in the later winter months before the shrub's growing season.
Avoid pruning during the wet or warm season to limit the likelihood of diseases. The densely-foliated blue spruce often develops dead areas within the tree's canopy. These dead areas occur when the heavy foliage begins to block the air and sunlight that flows through the tree.
To promote healthy cell development throughout the tree's canopy, use sharp, sterile pruning shears to thin the interior branches. Sep 21, 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.
Jul 21, Maintain the size of a dwarf blue spruce by pruning the tree a little each season.
Cut branches of the tree back by up to 1/4 of the length with clippers to reduce the tree’s overall crown size. Repeat this pruning method each dormant season to maintain the size of the blue spruce and eliminate the need for more drastic pruning later. Always prune above a bud facing the outside of a plant to force the new branch to grow in that direction.
Pruning large branches To remove large branches, three.