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The Best Time to Trim a Blue Spruce Timing. The blue spruce tree's slow growth makes it mostly intolerant to heavy pruning. In order to promote a positive Thinning. The densely-foliated blue fall tree wedding cake often develops dead areas within the tree's canopy. These dead areas occur Old Branches. Unlike. Aug 14, If you're looking to prune back the ends of the branches to produce a desired shape (shearing), then late spring or early summer in the growing season is best.

Dead branches can be pruned off at any time, but if you want to remove whole, live branches then prune from late winter to early spring before new growth starts.

How to Trim Blue Spruce Trees. Step 1.

There are many reasons why you need to trim the bottom branches of your blue spruce, such as.

Clean pruning shear blades before each use. Dip them in boiling water for 30 seconds to kill bacteria, fungus and insect eggs. If you don't Step 2. Step 3. Step 4. Step 5. It’s best to prune and shape the blue spruce in the late winter or early spring months, right before the growing season. You will know if a branch is competing with the trunk if it is over 1/3 of the trunk’s diameter. These are what you will remove. Remove the mentioned branches using sharp pruning shears while you wear your gloves.

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. Wait until the winter months to prune a healthy tree.

This minimizes the amount of sap that the tree will"bleed" and protects the tree from bugs and disease. Regardless of cultivar, prune Colorado blue spruce when plants are dormant, from midautumn through late winter. This cool, dry weather regime helps keep various fungal diseases out of the pruning wounds.