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Monitoring Mature Trees

The health of a tree is a major factor in determining how it responds to stress.  Insects, diseases and wounds are common contributors to the premature decline and death of a tree.  Wounds often lead to decay - the breakdown of tissues by many wood-inhabiting organisms over a long period of time.  Decay leads to a low quality, unsightly and hazardous tree.  When a tree is injured it becomes more susceptible to other problems.  A healthy vigorous tree heals wounds rapidly and fully and recovers from insect and disease problems.

A good way to care for your mature tree is to look for signs of trouble.  There are many signs that often go unnoticed until it is too late.  For example, early detection and removal of a diseased branch will prevent large-scale damage in the future.  The following are signs of tree problems:

• Broken branches

• Trunk wounds

• Leaf discoloration

• Small leaf size

• Premature leaf drop

• Holes in the trunk or branches

• Slow annual growth

• Presence of dead branches

• Abnormal branch or trunk swelling

• Presence of insects

All of the above problems are common for trees in the urban environment.  Once identified, controlling these problems is the next step.  At this time you should also determine whether or not you need to consult a certified arborist.

Older Tree Care

• Mulch around the tree to inhibit soil compaction, increase moisture retention, reduce soil erosion, improve soil condition and protect surface roots.

• Prune only dead, diseased and damaged branches.  Leave living branches with healthy, green leaves to produce food.

• Monitor regularly for pests and diseases and control infestations or outbreaks when they are small.  Monitor for other signs of stress as well.

• Water trees showing symptoms of stress.