Quoting from http://www.akron.com/pages.asp?aID=15774
“Moss is an equal opportunity plant that readily grows anywhere it finds favorable conditions. It has a shallow root system and thousands of tiny spores that can be quickly dispersed far and wide by wind and rain. This allows moss to gain a fast foothold and spread easily.
“Moss loves shady conditions with dappled sunlight, moist acidic soil of low fertility and poor drainage and little or no air circulation. Its favorite side of anything is the north side. Heavy clay soil and overgrown shrubs and trees all help to contribute to conditions that are favorable to moss growth. Although the moss may be unsightly, plants and grass are not harmed or killed by moss.”
Moss promises me that even in ugly areas (like clay on parts of our hillside) beauty can be found and spring will return! When we photograph flowers in the Smoky Mountains I love to try to capture close-ups of moss. I can imagine an entire village of tiny creatures and people populating it. Look closely next time you see moss! I once brought in a clump to grow on our window sill. It was very difficult to keep the light and moisture to it’s liking.