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Topsoil costs from $12 to $55 per cubic yard, depending on the type you choose. For example, screened black dirt will cost about $15 per cubic yard. Loam (soil composed of sand, silt, and clay) costs about $17 per cubic yard. Standard screened topsoil costs about $20 per cubic yard. The type of topsoil you need depends on your landscaping plans.

Mulch costs anywhere from $30 to $150 per cubic yard, depending on the type you choose. On the inexpensive end, red and black mulch are about $35 to $40 per cubic yard, and are typically made from recycled waste wood like shredded old pallets or deck material. Cedar, cypress, and rubber mulch cost anywhere from $100 to $120 per cubic yard. A pro can help you determine the type of mulch most suitable for your landscaping needs.

Topsoil should go down first. If the topsoil is next to your house, make sure the grade slopes away from the house to keep water from pooling against your foundation and possibly leaking into your basement or crawl space. Don’t cover your decorative landscape mulch with topsoil as that defeats the purpose of laying down the mulch. If you’re trying to create a certain soil composition to improve plant growth, you’ll likely want compost mixed into the topsoil instead of mulch. Over time, any decorative wood mulch will simply decompose under the topsoil.

No, mulch itself does not necessarily attract termites even though it’s usually made of shredded wood. Some types of mulch like cedar or cypress resist termites because they’re toxic or unappetizing to the wood munchers. However, when the mulch is deep enough, say three inches or more, it creates a perfect habitat for insects of all kinds to build nests.

Although it’s not required to lay anything under mulch, it can help to put landscape fabric or plastic weed barrier down and lay mulch on top. The barrier helps keep weeds from growing up through your mulch. It also helps keep rodents and insects from burrowing into the ground underneath.