Cultivating Moss

Question

I am trying to grow decorative moss on some large basalt boulders in my ‘Japanese’ garden. Is there a fertilizer that would be beneficial? Do they prefer an acidic environment? Any tips on how to make them flourish?

Answer 1

If you take buttermilk and some moss, then blend it up (in an old blender you don't intend to use for food), you can then spread this on the object you want to have moss grow on.
 
The buttermilk help provide the additional acidity the plant likes and the moss pieces will "regrow" to cover the whole object.