Dreaming of moss, denotes that you will fill dependent positions, unless the moss grows in rich soil, when you will be favored with honors.
Dream dictionary: Moss dream meanings
The moss indicates the situations that fix itself when they are left on their own. Sometimes we have to do nothing if we fish the problems to be solved. The moss is also a symbol of the time that is passing by and vulnerability.
To have interaction or to encounter or to see moss growing when you are dreaming, shows the way to or the direction of an extremely slow progress in some task, project, plan, or scheme or relationship. You need to be more patient.
To dream of moss on stone or walls is rather unlucky omen.