Experts and BHG readers answer.
Can I pile leaves around the base of a tree?
It's OK to pile leaves over the root zone of trees, but avoid piling them up against the trunk. Leaves piled against the trunk can hold in moisture that would lead to decay or rot. And, the leaves could also provide habitat for voles that might chew the bark off the tree. You could prevent the latter by encircling the trunk with hardware cloth.