Plants and trees have a direct connection to source energy, and it is this energy that causes healing to take place.

Plants and trees are highly intelligent masters of transmuting light into form and broadcasting information locally or non-locally.  Therefore their  ability to communicate and heal is superior to that of any other life-form on the planet, including humans.  At our core we are also directly connected to source energy and composed of fields of light.  But these fields become shrouded by layers of programming, conditioning and personality constructs.