Several years ago I was speaking with Denise Frolich and John Britton, both consulting arborists and authors of the certification program in calif. Denise is past president of asca and western chapter ISA. About the benifits of using soil or mud to rub into large pruning cuts to discolor them. They both thought soil was an excellent wound dressing. I want to know if anyone has heard of this and if anyone uses soil to cover pruning cuts