I had a shrub in a pot for quite awhile, that finally died..but left behind a lovely pot full of haircop moss. Bonus! I'm planning on planting it, but I'm wondering how quickly it spreads and how deeply it "roots" (I know it doesn't really have roots, but how deeply do I need to dig into that pot so I don't wreck it?)

I'm looking for ground covers to replace turf grass and the moment, so if it will spread quickly, that will be a plus and will help me decide where to put it..