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If you have a steep driveway, angular gravel, which is 3/4 to 2 inches in length, is a great choice. The stones won’t slide, allow for proper drainage, and stay in place even on the steepest slope.

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.

You should add 1 to 4 inches of mulch, depending on your garden type and needs. Keep in mind that no amount of mulch can completely prevent weeds, but a heavier coverage (closer to 4 inches) can suppress weeds enough that you are only seeing them sprout every few weeks. Finer mulch prevents weeds more effectively than large mulch, so if you’re using mulched leaves or shredded bark, 1 to 2 inches will likely suffice, while 3 to 4 inches is best for larger mulch, like bark chips or straw.

A yard of crushed concrete costs between $20 and $50. A single-car driveway will need 1.5 to 2.5 yards of crushed concrete, putting your material costs between $30 and $125, which is much less than you’ll pay for most driveway paving methods. Your total could vary based on the thickness you’re going for, and, of course, total prices will increase with added square footage for driveways that fit multiple cars.