My afternoon challenge: Build a dry creek bed.

[GBBUDD]

As long as it's not in the sun the right moss will survive and grow on anything.... And yes

 

[combatwombat]

As long as it's not in the sun the right moss will survive and grow on anything.... And yes

That rain chain is in direct sunlight all day spring through fall. The moss I have piled up gets a lot of sun, too, but it was living under a tree. Gonna plant some more trees in the yard, so maybe in a few years it'll have a better shot.