Washington State, USA. "Red Cedar." Photograph by Jeffrey Sullivan, via Flickr. The photographer captions, "Most rain forests actually have very poor soil. Many of the trees that successfully root do so on top of old decaying stumps and logs. (Nurse logs) These "nurse logs" provide the extra nutrients needed for years to come so the young trees can last long enough to establish themselves. As a result, many of the older trees seem to be 4 to 12 feet out of the ground.