Moss is known to grow in any shady, damp area, including on flower pots, statues, walls and walkways. You can help along the process of moss growth to create that Old World feel in your own landscape with a moss milkshake applied to the desired locations. A number of recipes for moss milkshakes are available-- some requiring different ingredients--supposedly needed to speed growth--but a just a simple mixture is needed to give the moss a place to start growing.
Gather moss, removing as much soil as possible. Pick out any foreign objects such as pine needles, rocks, acorns etc. Keep moist until mixing time.
Mix moss with buttermilk until it reaches a pudding-like consistency, using a blender or hand mixer.
Paint moss mixture onto the sides of clay, concrete or hypertufa containers, statues, walls and walkways in shady locations, as desired.
Move pots into shady locations and mist with water regularly to help promote the growth of transplanted moss.