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You can choose from various kinds of organic mulch and inorganic mulch. Organic mulch may be in the form of wood chips, pine needles, and compost and eventually decompose. Inorganic mulch, such as gravel, rocks, and landscape fabric, is more durable but doesn’t help the soil.

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.

Organic mulch typically lasts between 4 to 6 years. However, factors like the type of organic mulch you choose, mulch size, and weather conditions can all play a role in its longevity. In some cases, you’ll need to replace organic mulch every few years.

Yes, weeds can still grow in decomposed granite. If properly compacted, it can act as a good weed suppressant, meaning you’ll only pull weeds occasionally. But no ground cover is completely weed-proof. To further prevent weeds, you can try spraying your decomposed granite with distilled white vinegar.