Take the Healing Path Step 5: Always practical, when you do your needed garden or tree care chores, having this holistic approach will be both respectful and successful. You will be working in partnership with Nature.
The worst thing you can do is cover a tree's roots with ANYTHING! Soil, rocks, stones, more than 1 inch of mulch... yeah... anything. It would be like putting a pillow over your face. You would suffocate. So do they. Tree roots NEED AIR!