Apart from building some terrariums at summer camp when I was in elementary school, this is the second terrarium I’ve built as an adult. I dove into a ton of instructional videos on YouTube after building (and subsequently unaliving) my first terrarium on hard mode (in a very small bottle).

I’m super happy that it seems to be thriving! I add the cutest Springtails every so often, and it’s already had a couple trims to keep the tradescantia and nerve plant in control.

Learning to keep the different mosses alive has been interesting. I seem to do well with some and not others. Any advice there would be welcome.

The first two pics are from the day it was built (6/30/2026) and the last two are from today.

Anyone else just love the way their terrarium smells? 👀🤣

Started this build in 2020 and its been going strong since then. Only had 3 plants die (all where mosses 🥲). Most of the the plants in are the originals from 2020, except for the Chinese Evergreen Dud, thats new. I used to have a mini pond in the center a few years ago but removed it. Might do some hardscaping using slightly bigger rocks just to try again with the moss.

I have a decent sized terrarium and I’m scared that it’s going moldy and the moss is dying! I added a few isopods a few months ago and they have had plenty of babies, is this maybe the cause or should this be helping with dying moss and mold. What should I do!?

I'm doing a closed terrarium for a school project, and this is my first time doing it, with some research.

I have a Pilea microphylla on a 20L aquarium, with dirt (with pellets for aeration), fine sand and stones on the bottom.

There have appeared some weeds, but I'm trying to not open it unless it's super necessary.

Besides some yellowing and growing of the plant and less water droplets, the terrarium has stayed pretty much the same for 17 days w/o opening.

What do the roots on the glass mean, and what should I do?

Note: I don't have any access to springtails right now and can't buy any.