For a border that keeps its shape, angular crushed stone is the safer pick; rounded river rock wins on looks but needs real edging. The difference is the edges: crushed granite pieces bite into each other and stay put, while smooth river stone rolls underfoot and creeps into the lawn.
How they compare
| Trait | River rock | Crushed stone |
|---|---|---|
| Look | Soft, natural, rounded | Crisp, uniform, tailored |
| Staying power | Migrates without edging | Locks together |
| Best border use | Curved beds with a steel or paver edge | Straight lines, high-traffic edges |
Both come in the versatile ¾" size: see Riverbed ¾" for the rounded look or Gray Granite ¾" for clean angular lines. Either way, a 3-inch depth over fabric keeps weeds down through the growing season.
