Corona's Principles of Pruning How to Guide

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• Large, dead branches or branches that are just hang-

ing around can pose a danger. The best time to check

for these potential threats is late fall or winter when

there is little or no foliage to obstruct your view.

• Cavities, rotten wood, or cracks and splits along the

trunk or major branches may provide an entrance

for cankers and wood-rotting organisms.

• Wires in contact with tree branches.

• A pronounced lean or a tree with several major

branches arising from one point in the trunk

may ultimately pose a threat.

• Root damage from installing pavement, repairing

sidewalks, or digging trenches can weaken a tree.

• Heaving soil at the base of a tree is a potential

indicator of an unsound root system.

• Leaves that have prematurely developed an unusual

size or color or if the tree has been heavily pruned.

Dead leaves at the top of trees are usually the result

of environmental or mechanical root stress whereas

twisted or curled leaves may indicate a viral infection

or insect infestation.

INSPECTING TREES FOR SAFETY

Here are a few things to look for when inspecting your trees for safety:

This list may be a good start if you’re looking to ensure your trees are healthy and safe. If you see any of

the above signs, give your landscape professional or tree care expert a call. They can quickly determine if the

symptom poses a real threat and needs to be addressed quickly.