Moss Rocks from Moss and Stone Gardens
Photograph © Kerry Michaels
Hmmm...I was surprised to read this fascinating and in-depth article, by Helen Yoest on using moss in terrariums. It turns out that it's not all that easy to keep moss alive in the enclosed and therefore humid environment of terrariums.
The article suggests that you should really keep your terrarium uncovered for most of the time, only sealing it for special occasions.
Read the full article and check out the fabulous site all about moss, Moss and Stone Gardens: