How mulch quantity is calculated
Mulch is typically measured in cubic yards. The amount needed depends on the total square footage of the bed area and the desired depth — deeper coverage requires more material per square foot.
Why depth matters
Too little mulch won't effectively block weeds or retain moisture. Too much can smother plant roots or hold excess moisture against stems. Getting the depth right is part of a proper installation.
Getting an exact number for your yard
Because every bed is a different shape and size, the most accurate way to know how much mulch your property needs is to have it measured as part of a quote.