If you have pea gravel pathways or a river rock patio, it probably looked great when you first put it in; after a few seasons, though, it starts to look a little tired. That’s because mud, pollen, and other particulates can mix in with the gravel, changing its color and making it look grungy. To freshen up your…
Source: LifeHacker – You Can Clean Your Grungy Landscape Rock