Care guide
A closed terrarium looks after itself most days. These few habits keep it that way for years.
Light, never direct sun
Bright, indirect light near a window, or the LED grow light for a few hours a day. Direct sun through glass cooks the plants.
Water only when the soil looks dry
Sealed, it recycles its own water. If the substrate turns pale and there is no fog in the mornings, add a few sprays of clean water along the glass.
Fogged all day? Air it out
Light morning condensation is the cycle working. If the glass stays fully fogged into the afternoon, open the lid for an hour.
Trim what touches the glass
Pinch back fittonia and ferns before leaves press on the glass, and lift out any yellow leaves so they do not rot.
Keep it at room temperature
Away from air-conditioner vents, heaters and hot car seats. Steady indoor temperatures suit moss and fittonia best.
No fertiliser
Feeding makes plants outgrow the glass. The charcoal and substrate layers give them what they need.
Something looks off?
Send a photo on WhatsApp. Most problems are a light or water fix.
Common care questions
Why is the glass fogged every morning?
That is the water cycle working. Overnight the air inside cools, moisture condenses on the glass, and as the day warms it runs back into the soil. Light morning fog is healthy.
How often should I open it?
Rarely. Open the lid only to trim plants, lift out a yellow leaf, or air it for an hour when the glass stays fully fogged into the afternoon. Otherwise leave it sealed.
A leaf has turned yellow. What now?
Lift it out with tweezers so it does not rot and spread mould. One or two yellow leaves are normal as plants settle; a lot of them usually means too much direct sun or too much water.
Where should I keep it?
Anywhere with bright, indirect light and a steady temperature: a desk, a shelf near a window, a bedside. Keep it out of direct sun and away from air-conditioner vents and heaters.