I recently had a bit dry up, just once, it never goes back to normal.
Starting a bunch on your substrate elsewhere in a few pots, is the best way to get it to live normally on your soil.
Second best is that grown on the concrete expansion material...havent gotten it to grow on it myself yet, but collected, with moss already meshed into the fibers of it...
Highly highly stable. And its like it cant get dry.
Test some...
I got a lot of moss with black dirt bottom that stays real wet, and though it seems the dirt may "ruin" the soil, its no worse than a typical season outside with no covering, leaves, needles, bird doo, insects...etc...
So its pretty stable too and if it ain't...
No worries till repot anyway...
Key key key...
Tall and tight.
The taller it is the more water it holds...
If you can find really tall moss, you can chop almost all the sustrate of and it becomes its own substrate . ....this seems a good way to transfer it to your substrate.
Sorce