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Yes, you can lay pea gravel directly on the dirt. First, dig a trench 2 to 6 inches deep the length and width of the area you want to cover. Plants and weeds will eventually grow through the pea gravel if you don’t lay down landscaping cloth.

While you don’t need to put anything down before mulch, you can apply a pre-emergent herbicide to prevent weed growth. As long as you remove weeds before you spread mulch, you should be in the clear. But a herbicide is something that you can put down before mulch as an extra layer of protection.

The main benefit of topsoil is that it enriches the soil with nutrients that help your plants and garden grow at a healthy rate. Topsoil improves how well your soil drains water and gives it a more fertile texture, so that not only do you get better planting, but weeding is also much easier.

When it comes to which stone is better, crushed or natural gravel, it all depends on the project. Crushed stone is a great base and filler material for projects like retention walls, concrete slabs, driveways, pipes, and drains. Gravel is a common choice for visually attractive landscaping projects like walkways, above-ground drainage systems, patios, and garden borders.