While browsing the web I found a picture of something I would like to try. The person had taken irish moss and made circles on a path to form 'stepping stones' with white pebbles around the moss circles. I'm in Northern Viginia, zone 5, and have tried to grow irish moss in two places with no success. Is there another 'steppable' moss that would do the same thing? Or would what I'm describing not even be worth the time?