How Much Mulch Do I Need?

You can easily calculate the amount of mulch required by determining the area you need to cover and the desired depth of the mulch.

1. The Calculation Formula

To figure out the cubic yards of mulch you need, use this formula:

• Length $\times$ Width: This gives you the total square footage of your area.
• Depth: We recommend a depth of 3 inches for most applications.
• Divide by 27: This is the conversion factor to turn $\text{cubic feet}$ into $\text{cubic yards.}$

Example: If your garden bed is 50 feet long and 10 feet wide, and you want 3 inches of mulch:

2. Standard Coverage Guide

For a quick estimate, you can refer to this chart showing how much area one cubic yard of mulch covers at different common depths:

3. Recommended Depth

We generally recommend a depth of 3 inches for most applications.

Important Tip: Avoid applying mulch deeper than 4 inches, especially near tree trunks, as this can trap too much moisture and cause rot or invite pests. Keep mulch a few inches away from the base of trees and shrubs—this is known as the mulch doughnut method, not the “mulch volcano.”