Terrarium Care Guide

A simple guide to help you keep your terrarium healthy and thriving.

1. Light

Your terrarium thrives in bright, indirect light.
Place it near a window where it receives filtered daylight, but avoid harsh direct sun, which can overheat the glass and scorch plants.

Best locations:

  • Near an east- or north-facing window

  • A bright room with diffused light

  • For low-light terrariums (like moss), shaded areas work well

2. Watering

Terrariums need very little water. Overwatering is the most common issue.

Closed Terrariums

  • Water only when the glass becomes fully clear (no condensation) or the soil looks slightly dry.

  • Typical frequency: Every 4–6 weeks.

Open Terrariums

  • Water lightly when the top layer of soil is dry.

  • Typical frequency: Every 1–2 weeks, depending on airflow and temperature.

How to water:

  • Use a spray bottle or pipette.

  • Add small amounts at a time—stop when the soil is evenly moist, not soggy.

3. Temperature & Environment

Terrariums prefer stable indoor conditions.

  • Ideal temperature: 18–26°C

  • Keep away from heaters, radiators, and cold drafts

  • Avoid placing next to windows that get hot afternoon sun

4. Ventilation

Even closed terrariums need occasional ventilation.

  • Open the lid for 10–20 minutes every 1–2 weeks

  • If you see excessive condensation running down the glass, open the lid to release humidity

  • If plants look dry or curled, close the lid more often

5. Cleaning the Glass

Clear glass helps your plants photosynthesize.

  • Wipe the inside with a soft cloth or paper towel

  • Avoid harsh chemical cleaners

  • If algae forms, gently scrub the affected area with a cotton swab

6. Pruning & Maintenance

Plants grow slowly in terrariums but still need occasional attention.

  • Trim back plants touching the glass

  • Remove dead leaves to prevent mould

  • If moss lifts or browns, mist lightly and press it back into place

7. Common Issues & Fixes

Too Much Condensation

Cause: Overwatering or too much heat
Fix: Vent the terrarium for a few hours and reduce watering amount

Plants Turning Yellow

Cause: Poor airflow or excessive moisture
Fix: Open the lid more often; remove yellow leaves

Dry or Crispy Leaves

Cause: Low humidity or under-watering
Fix: Mist lightly and ensure terrarium is not in direct sun

Mould Growth

Cause: Stagnant air or overwatering
Fix: Remove affected parts, air out the terrarium, reduce watering

8. Long-Term Health Tips

  • Rotate the terrarium occasionally for even light

  • Keep soil free of pests and debris

  • Refresh moss or top dressing every few months if needed

  • If plants outgrow the space, trim or transplant