This is a natural stone walkway I built 7 years ago. We used a mixed stone that was present on site – mainly canadian flagstone. You can quickly expand moss through several different methods – one being blending moss into buttermilk and painting onto surfaces. This moss grew naturally, but as mentioned there are ways to spread moss quickly. Depending on your base (the supporting structure under a walkway/patio), total sqft and style of stone layout a walkway/patio like this would cost around $17 a sqft
