How to Make a Terrarium

Creating a terrarium is a fun and rewarding project that brings a touch of nature indoors.

Unlike regular houseplants, terrariums create a mini ecosystem that is both decorative and easy to care for.

Whether you want a small succulent arrangement or a lush mossy landscape, learning how to make a terrarium step by step will help you design something unique and long-lasting.

What You’ll Need to Make a Terrarium

Before starting, gather these essential materials:

• Glass container – open bowls, jars, vases, or closed lids, depending on the type of terrarium.

• Pebbles or gravel – for drainage at the bottom.

• Activated charcoal – prevents odors and mold.

• Potting mix – choose soil suited for your plants (cactus mix for succulents, organic soil for moss).

• Plants – succulents, moss, ferns, or small tropical plants work best.

• Decorative elements – stones, shells, figurines, or moss for a personal touch.

• Tools – small shovel, tweezers, chopsticks, or a spoon for planting in tight spaces.

Types of Terrariums and Which One to Choose

Not all terrariums are the same, and choosing the right type is key:

• Open terrariums: Perfect for succulents and cacti, which need airflow and drier conditions.

• Closed terrariums: Best for ferns, moss, and tropical plants, as they trap humidity and create a rainforest-like environment.

Think about the plants you like and the environment you can maintain before deciding.

Step-by-Step Guide to Building Your Terrarium

1. Clean the container – Ensure your glass is spotless to prevent bacteria and mold.

2. Add the drainage layer – Place a 1–2 inch layer of pebbles or gravel.

3. Include activated charcoal – A thin layer helps control odors and keeps water fresh.

4. Add soil – Depending on your plants, use the right mix (cactus soil for dry-loving plants, peat-based soil for humid ones).

5. Arrange your plants – Start with the largest plant in the center or back, then fill with smaller ones around it.

6. Decorate – Add moss, stones, or figurines to personalize your terrarium.

7. Water lightly – A gentle mist or a few drops are enough at the beginning.

Caring for Your Terrarium

• Light: Place your terrarium near bright, indirect sunlight. Avoid harsh direct rays on glass, which can burn plants.

• Watering: Open terrariums may need water every 1–2 weeks. Closed terrariums need much less—sometimes only every few months.

• Condensation: If you see too much moisture on the glass of a closed terrarium, open the lid for a few hours to air it out.

• Trimming: Keep plants from overcrowding by trimming or replacing them when needed.

Common Mistakes to Avoid

Even though terrariums are low-maintenance, these mistakes can ruin them:

• Overwatering – the most common problem, leading to root rot.

• Wrong plant choice – mixing succulents with tropical plants will create an imbalance.

• Poor lighting – too little light makes plants leggy; too much direct sun overheats the container.

• Skipping charcoal – without it, your terrarium might develop foul odors and mold.

Bringing It All Together

Learning how to make a terrarium is more than just a DIY project—it’s about creating a miniature living world that you can enjoy every day.

With the right container, plants, and a little care, your terrarium can thrive for months or even years.

Start small, experiment, and you’ll soon see how these tiny gardens transform any room into a greener, fresher space.

Enjoy This Video Tutorial

Source: Dobbies Garden Centres

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