Tree Mulch Ring Calculator
Single Tree Mulch Ring
Calculate mulch for a single tree ring
Multiple Trees
Calculate total mulch for several trees
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Formula
Mulch (cu yd) = π × (R² - r²) × Depth / 324
Frequently Asked Questions
How wide should a mulch ring be around a tree?
The mulch ring should extend at least 3-6 feet from the trunk for young trees, ideally to the drip line. A wider ring reduces mower damage and competition from grass.
How deep should mulch be around trees?
Apply 2-4 inches of mulch, keeping it 3-6 inches away from the trunk. Do not pile mulch against the trunk as this promotes disease and pest problems.
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