CoCreating? It's a mutual endeavor. It rests on a solid foundation of communication and collaboration then goes further. Unlike most negotiations, CoCreating means that each party works to make sure the other gets what they need.
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!