I spent a number of years in intensive pro-bono work in little communities on the reforestation of the urban landscape. Unbelievable what was out there! One of the illustrations we still call the volcano method of mulching. Lessons on how a tree grows, canopy, trunk, buttress flare, root system……….goes a long way. But nothing like the street trees unearthed years later with adventitious roots growing out of their trunks. Why did the tree do that? To survive! Then the site rots. Really wasn’t a root site after all. Takes place years, sometimes not all that many, after the contractor has long gone.