Top Tips for Maintaining a Healthy Terrarium

Clarisse Santos
Mar 25
2 min read

A lush, closed terrarium with vibrant green plants, placed on a wooden table with gardening tools nearby, bathed in natural sunlight.

Terrariums are like tiny, self-sustaining jungles for your home—low maintenance, visually stunning, and perfect for Australian climates.

But here’s the catch: without the right care, your lush paradise could turn into a moldy swamp or a barren wasteland. Yikes. Don’t worry! With these simple tips, you’ll have a thriving terrarium that’s basically its own little ecosystem of perfection.

Choosing the Right Soil & Drainage for a Healthy Terrarium (Because Plants Hate Wet Feet)

The wrong soil mix can doom your plants before they even get comfy. Here’s how to keep their roots happy:

For dry-climate plants (think native succulents): Use a sandy, fast-draining mix.
For humidity lovers (ferns, mosses): Go with a peat-based blend.

Pro tip: Always start with a 2-inch layer of gravel or perlite for drainage, and sprinkle in some activated charcoal to keep things fresh and mold-free.

Essential Care Tips for a Thriving Terrarium

Water smart. Stick your finger in the soil. If the top layer feels dry, water lightly. If it’s damp, leave it alone. (Overwatering is the #1 killer of terrariums!)
Let there be (the right) light! Open terrariums love bright, indirect light. If your plants start stretching or getting leggy, they need more sun.
Keep it clean. Every few months, wipe the glass, remove dead leaves, and refresh the soil if needed.
Listen to the experts. “Australian natives like Speargrass and Pigface thrive naturally in these setups,” says Perth horticulturist Mia Green.

Troubleshooting: When Things Go South

Mold Taking Over?

Increase airflow (slightly open the lid or add ventilation holes).
Wipe affected areas with a damp cloth and cut back on watering.

Plants Looking Sad?

Yellowing leaves? You’re overwatering.
Droopy stems? More light is needed.
Crispy, brown edges? Try misting occasionally.

The Final Takeaway

A beautifully designed terrarium with succulents, moss, and a central rock, resembling a miniature forest scene with a misty background.

Your terrarium is its own little universe—watch it, tweak it, and enjoy it.

With the right balance of water, light, and soil, you’ll have a gorgeous, self-sustaining green haven.

Share your thriving terrarium journey using #AustralianTerrariumLovers and let your mini jungle shine!