Terrarium Care
& Maintenance
Everything you need to keep your miniature ecosystem healthy — from watering schedules and humidity levels to pest management and seasonal placement.
Top 10 Terrarium
Care Tips
Your terrarium is a special and delicate ecosystem that requires specific care to thrive. These are the fundamentals every terrarium keeper should know.
Keep your terrarium in a bright location, but out of direct sunlight, which scorches leaves and overheats the glass.
Mist every other day or place a small dish of water inside. Humidity keeps moisture-loving plants happy without waterlogging roots.
Mould on plants or soil is a sure sign of too much moisture. Improve ventilation and reduce misting frequency immediately.
Use a balanced liquid fertiliser diluted to half strength, once or twice during the growing season only.
Especially important for ferns and mosses. A fine mist on foliage supplements ambient humidity without over-saturating the substrate.
Check regularly. Blast aphids with water; treat mealybugs with insecticidal soap. Catch infestations early before they spread.
Remove any plants that outgrow their container. Trim back others to maintain the balance and airflow of your design.
Let the top centimetre of soil dry between watering sessions. Most terrarium failures come from too much water, not too little.
Rotating ensures all sides receive adequate light exposure, preventing leggy one-sided growth.
Keep terrariums away from heaters and air conditioners. Stable temperatures in the 18–26°C range suit most species.
Terrarium Plant Care
The plants you choose determine how much care your terrarium needs. Select species that share similar light, humidity, and moisture preferences so they thrive together without competing.
Tip: Pair plants with similar requirements — mixing drought-tolerant succulents with moisture-loving ferns is a common beginner mistake. Browse our Plant Library to find compatible species.
Watering & Drainage
Water management is the most critical aspect of terrarium care. Too much water causes root rot and mould; too little stresses your plants. The goal is consistent, gentle moisture — not saturation.
Most common mistake: Overwatering. Terrariums are enclosed systems — water doesn't evaporate the way it does in open pots. Always err on the side of underwatering.
Open Terrariums
Water every 7–10 days. Let the top layer of substrate dry slightly between sessions. Check moisture with a finger or chopstick.
Closed Terrariums
Closed terrariums recycle moisture — you may only need to add water monthly or less. Condensation on the glass is normal and healthy.
Cleaning & Maintenance
Regular maintenance keeps your terrarium looking its best and prevents problems from taking hold. Aim for a quick check weekly and a deeper clean every month or two.
Glass & Surfaces
Wipe glass with a damp cloth to remove mineral deposits and water marks. Avoid chemical cleaners near plants — use water only.
Plant Debris
Remove dead leaves and spent growth promptly. Decaying material sitting on substrate increases the risk of fungus and mould.
Hot Weather Care
Heat waves stress terrarium plants. Move your terrarium away from windows and monitor for wilting or excessive condensation.
Deep Clean
Every few months, remove plants, replace substrate if needed, and scrub the container thoroughly before replanting.
Design & Placement
Where you place your terrarium affects plant health just as much as watering. Light, temperature, and airflow all play a role.
Golden rule: Bright, indirect light, stable temperature (18–26°C), and away from drafts. A north or east-facing windowsill is ideal for most species in the Southern Hemisphere.
Quick Reference
Common terrarium problems, their likely causes, and how to fix them.
| Symptom | Likely Cause | Fix | Priority |
|---|---|---|---|
| Mould on soil or plants | Excess moisture / poor airflow | Reduce misting; improve ventilation; remove mouldy material | Urgent |
| Yellowing leaves | Overwatering or low light | Check drainage; move to brighter indirect light | Monitor |
| Leggy, stretched growth | Insufficient light | Relocate to brighter spot; rotate regularly | Monitor |
| Wilting despite watering | Root rot from overwatering | Remove plant; inspect roots; repot in fresh substrate | Urgent |
| Crispy brown leaf tips | Low humidity or direct sun | Mist more often; move away from windows | Monitor |
| White residue on glass | Mineral deposits from tap water | Wipe with damp cloth; switch to filtered water | Low |
| Tiny flying insects | Fungus gnats from moist soil | Allow substrate to dry more; use sticky traps; neem oil drench | Monitor |
| No growth | Dormancy or low nutrients | Fertilise at half-strength; ensure adequate light; check season | Low |