Greetings, I have just done some extensive pruning on 2 twenty foot tall Juniper "Medora" trees. Under the trees is a large area of 3 or more inches of rich, black "soil" created from the tree "droppings"! I hate to NOT use it if I can. Is it safe to use this soil? If so, where would be the best place to use it - flowers, vegs, lawn...??? Thanks, Andrea