Lost a whole terrarium to mold in less than 48 hours

I built a closed terrarium last Saturday with moss and ferns from a local park. By Monday morning, everything was coated in white fuzz because I sealed it while the soil was still wet. I tried opening it up and scraping the mold off, but the moss was already rotting underneath. Lost about $20 worth of supplies and two hours of work on that one. Anyone else had a closed terrarium go bad this fast from too much moisture?

2 comments

2 Comments

jordan13417h ago

... and not to pile on, but was it really $20 worth of supplies? Like, moss and ferns from a local park are free, you just need a jar and some dirt. But yeah, sealing wet soil is basically asking for mold, that's the number one mistake people make with closed terrariums. You gotta let everything dry out for at least a day or two before you even put the lid on, otherwise you're just creating a science experiment.

faithbaker14h ago

Started air drying my moss and soil for two days after the first mold disaster. Total game changer. Now my closed terrariums barely need any maintenance.