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Gravel’s biggest pro is its cost-effectiveness. For example, a gravel road or driveway is much more affordable than its asphalt counterpart. Gravel is also much less expensive than the cost of pouring a concrete slab if you’re building a patio or similar structure.

However, regarding comfort and convenience, gravel is far less foot-friendly than smoother substances like concrete or asphalt. It’s also more of a challenge to drive on and may kick up dust, resulting in the inevitable need for extra car washes. Lastly, there’s a chance it might move with rain or snow.

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.

Mulching any time of year can attract termites, so there’s no added risk in the fall. The important thing to remember is that termites are attracted to rotting wood, so you need to lay a thin enough layer that won’t trap too much moisture and lead to rotting. A layer between 1 and 4 inches thick should provide all the benefits you’re looking for without attracting termites.

The best mulches for trees are wood chips, bark nuggets, or pine straw. Depending on your goals, you may want to avoid using plastic, stone, rubber, or wet grass clippings. Plastic mulch prevents water from reaching the mulched areas of your tree, stones don’t offer any nutritional benefits to the soil, rubber can release byproducts into the soil when it decomposes, and wet grass clippings can lead to rot. 

Plastic may prove beneficial in cold climates in the winter, but wood chips are the ideal option for most environments.