Family Tree Service LLC     ISA Certified Arborist MN-4391A

In order to diagnose tree health, we must first look at the physical properties of trees in general.

The outer layers, the 'Biological Tree', are where water is being transferred and living tissue is growing. The inner heartwood, the 'Mechanical Tree' , makes up the interior structure of a tree.

It is important to understand this concept of a 'tree within a tree' (Dr. Alex Shigo) when considering the condition of a tree.

For a tree that appears healthy, very full and green, could actually have a heartwood failure, and be hollowing from the inside out. Not something you would consider structurally sound at all! (see photo below)

On the other hand, a tree that may have died on the outside, could have a hardened petrified heartwood and stand stronger than ever for many years. (see photo above)

This Large Basswood looks fully green and healthy although it has a large wound...Actually, most of the tree trunk is hollow!

Look for hollow spots, along with cracked, dead and broken limbs. These are signs of a hazard and need to be addressed immediately!

 The condition of a tree can only be weighed by an evaluation of the whole tree inside and out.

Have our Arborist out to check on your trees!