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

Sterilize tools after every pruning session, whether pruning healthy trees or removing diseased branches.

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. 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 when does one trim blue spruce bushes shrub's growing season.

Avoid pruning during the wet or warm season to limit the likelihood of diseases. Moreover, how do you stop a spruce tree from growing taller?

Trim them back several inches. Work your way down the sides of the tree, after finishing the stumphaul.bar all branches back several inches to keep it in proportion, so that it still has the basic cone shape of a pine stumphaul.bar one of the top small stems, just below the top stem that you cut short, and bend it upward. Jul 21, According to North Dakota State University, evergreen trees, and especially blue spruce trees, cannot survive severe pruning, so never cut the branches on a dwarf blue spruce back by more than 1/4 of the length at any one time.

If you must prune a dwarf blue spruce, do so during winter when the tree experiences less growth. The Blue Spruce is one of the most popular evergreens, an ornamental tree that has silvery-blue needles, 3-inch pinecones, and gray or tan bark.

These are hardy plants in USDA plant hardiness zones 2 to 7, though the Hoopsii blue spruce can thrive in USDA zones 2 to 8. They are usually used as Christmas trees, requiring only moderate maintenance with the ability to live for hundreds of years.