Whether you’re buying bagged mulch or purchasing in bulk, you’ll need to determine how much is needed to get the job done. Bethany Farm and Nursery’s mulch calculator can help. As a rule of thumb, mulch should be spread in a 2″ to 4″ deep layer, any deeper and you risk suffocating the roots of your plants and trees. This calculator is also great for determining how much topsoil or sweet peet is needed for your next project and how much it will cost.
Measure the length and width of your project area. For irregularly shaped beds, break them up into rough rectangles. Then calculate the mulch needed for each section and add them for the total amount of material needed.