I have some Flame moss that I attached to driftwood with cotton thread. I tried to cover the driftwood as evenly as possible but figured eventually it will all grow in. As far as I can tell, the Flame Moss seems to only grow up (vertically) and not spread. I've had the moss for 3 months now; is anyone more familiar with the way it grows? I'm wondering if I need to take out the driftwood and cover up the bare spots with more Flame Moss.