Okay, thanks for the info! The mold hasn't really spread, so I'm hoping it will go away in time. There is condensation on the glass, but the jar is never in direct sunlight.
Birds ripped apart my saxifraga plants on the balcony and I added a small piece to the moss terrarium just to see what would happen and I'm so happy to see it just continues growing after being tortured
What? Why would they peck a plant like that? Seems like your birds are a bit crazy ^^ Mine just redecorate my mossgarden ^^ cool terrarium, I bet the plants will grow huge in there.