pea gravel is a pain to remove should you ever want to change your garden layout. Finally, like all rock mulches, pea gravel compacts the soil and holds heat, which can damage plants. In most cases, wood chip or other organic mulches work better with plantings. Gravel. Machine crushed gravel has triangular sides that fit together. A Guide to Pea Gravel, Gravel, Crushed - Gardening Channel Please note: You are currently browsing img pea gravel landscaping pictures landscaping gardening that is 800x600px in size. This image is listed in pea gravel landscaping ideas category. A Guide to Pea Gravel, Gravel, Crushed Gardening Channel, 800x600 in 228.54 KB.