The Whispering Crane Institute was originally formed to act as the umbrella organization for the Philosophy of Design Symposium, and other seminars and workshops given by Rick Anderson and Richard L. Dube’. In the year 2000 WCI became a sole proprietorship owned by Rick Anderson.
Today the WCI provides design and consultation services for Landscape Contractors, acts as a Green Industry think tank, and provides training for others in the form of workshops, seminars, and individual consulting. The WCI also provides written material, opinions, case-studies and how-to articles for industry trade magazines.
My experience has been that moss does not seem to grow well/or at all on igneous stone(basalts), or any type of granite or mica-schist stone.
I have seen moss do very well on all sandstone, no matter the area of the country, and even a little limestone-even though moss like acidic soils . . . but in the end moss with sandstone is the way to go.
The Whispering Crane Institute 
Tell me a little about the inability to grow moss
disclaimer: I’m not a Scientist . . .