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When it rains, decomposed granite can become muddy and mushy in texture and start to wash away, leading to erosion of the surface. Decomposed granite’s inability to endure heavy rainfall is one of its biggest drawbacks.

As a base, you should use a fertilizer with a 5-5-5 NPK ratio (5% nitrogen, 5% phosphorus, and 5% potassium). You may need a different ratio depending on what your soil is lacking, but a soil test can help determine the perfect amount.

Keeping your gravel driveway beautiful—or any gravel structure for that matter—does call for regular maintenance. You may occasionally need to add more gravel to low areas if you notice any pooling after rainfall. Gravel might also become excessively dusty over time. You can compact it with a mechanical compactor, which you can rent for around $80 to $85 per day.

To minimize maintenance requirements for your gravel, it’s important to ensure your land is properly graded before installing the gravel. It’s also helpful to lay landscaping fabric beforehand to keep it in place.

The best size rock for your landscaping depends on the design, as different boulders serve different purposes. If you want to group boulders to create a natural-looking cluster, you’ll need a range of sizes. Otherwise, here are some suggestions:

• Small boulders (smaller than 12 inches across): Best for landscape edging and fire pits 

• Medium boulders (12–24 inches): Best for retaining walls and water features

• Large boulders (more than 24 inches): Best as standalone landscaping features, steps, or walkways.

Of course, you can mix and match sizes to create a unique display.