Greetings...
I am wondering if you're using the wrong variety of moss from the get go...I'm also wondering if placing the pots on plastic/pottery saucers and adding water to them virtually daily so they don't dry out would be better than the mold-inducing bags which don't allow air circulation.
Here's my theory - I grow an AMAZING crop of 'velvet' moss - it's not the tall type you're showing in your photos - instead, it's more like a film or fabric....all over my paved walkway on the north side of my house. This area gets NO direct sun, but plenty of water and air. The moss literally feels like velvet and volunteers heartily.
We have snow on the ground now, but come spring, if you wanted to send me postage, I would be happy to scrape up some of this 'velvet' moss and send it to you. I think you'd have better luck.
Jen
