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The cost of 200 square feet of pea gravel depends on how deep your installation will be. The pea gravel material alone costs between $15 and $75 per cubic yard. You'll need just under two yards to cover 200 square feet to a depth of three inches, for a total cost of between $30 and $150.

Pea gravel consists of many small, rounded stones that, unsurprisingly, kind of resemble peas. They range in size from 1/8 to 3/8 of an inch. Higher-end products might be a little more uniform and have fewer jagged rocks in the mix.

You should exercise care when deciding how to landscape over a leach field for your septic system. You typically want lightweight materials that won’t damage the drain field’s perforated pipes. When adding plants to the area, select plants with shallow roots, such as grass or flower gardens. Trees with deep roots could damage the pipes in the field.

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.