Don't put anything over the roots of a tree. That causes suffocation because roots need air as much as they need water. Don't bury the tree in additional soil or under rocks. FILL KILLS.
Do these 10 things for trees and you will be a Hero Tree Protector!
Clean up not only the trash around trees but also the legal, governmental, and business culture concerning the environment. And, we Tree Protectors can help each other do it.
Leaving leaves--shredded or whole--gives trees what they need. And it looks just fine. They are better than mulch.
There’s more to transplanting than digging a hole. The tree is entirely dependent upon you to help it survive at least its first season in the new spot. Here are the key points and a detailed description.