Estimate mulch for a ring around a tree trunk.
A mulched circle around a tree is its area times the mulch depth, converted to the yards or bags sold at the garden center. A proper mulch ring holds soil moisture and protects the trunk, but must sit away from the bark to avoid rotting it.
Tree Mulch Ring
Mulch = ring area x depth; keep mulch off the trunk
Mulch = ring area x depth; keep mulch off the trunk A mulched circle around a tree is its area times the mulch depth, converted to the yards or bags sold at the garden center.
A proper mulch ring holds soil moisture and protects the trunk, but must sit away from the bark to avoid rotting it.
This calculator takes 2 inputs: Ring radius, Mulch depth. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.