Ever wondered how a tree that is hollow on the inside can be alive, or have not fallen when 
the wood is hollow in the middle? Internal decay is a common phenomenon in trees. I wouldn’t call it good, but it is normal (i.e. very common). These cavities are caused by mother nature’s decay fungi. Their job in the grand scheme of things is decompose woody materials back into the soil.
The decay process usually gets started from some large wound. Could have been from a lightening strike, broken limb or even a damaged root underground. Any large wound usually leads to decay. Wounds larger than about 3-4″ diameter (can vary depending on tree species and health) take Continue reading Cavity in Your Tree – Internal Decay