How to make your own DIY terrarium

Step 1 - Choose your container

When it comes to choosing a container, any size or shape will do, as long as it’s transparent glass. Chances are you’ve probably got a suitable container somewhere in the home. You could use an old fishbowl, glass bottles, or jam jars – all these containers would be perfect for a terrarium. 

Step 2 - Choose your terrarium plants

Now that you’ve got your container sorted, it’s time to choose your terrarium plants. You’ll want to go for small plants that thrive in humid environments and prefer low to medium light. When you choose your plants, look for a variety of colours and shapes to create visual interest.

Step 3 - Add your drainage layer

Once you’ve picked your plants, you can start assembling your miniature garden. First, add a layer of gravel for drainage. Remember, a terrarium doesn’t have drainage holes, so adding a drainage layer is crucial for ensuring water doesn’t pool at the bottom. Excess water at the bottom of your container could drown your plants.

The amount of gravel you add will depend on the size and height of your container, a good ratio for your drainage layer is to make it about one-quarter the height of your container.

Step 4 - Add your charcoal, moss, and compost

If you have some activated charcoal, scatter it over the top of your drainage layer. This will keep your plants healthy and prevent any bacteria from growing.

Next, insert a layer of moss to protect your drainage layer and to add some greenery to your enclosed garden. Again, the moss isn’t necessary, but we think it adds another attractive element to your terrarium.

Once you’ve added some charcoal and moss, cover with compost, ensuring you break up any big chunks of soil. We suggest using peat-free houseplant compost or potting mix.

Step 5 - Add your plants

Remove your plants from their container. If their roots are particularly long, trim the roots with some scissors. This will stunt the growth of your plants, helping them stay smaller for longer. Once your plants are prepped, it’s time to add them to your container. You can use a mini trowel or even your hands. If you have a terrarium with a narrow opening, use chopsticks or tweezers to add your plants.

Before you start adding all your plants, think about how you want the finished product to look. You want to create the perfect balance of colours and textures with your chosen plants. Start with your biggest plants and work your way down to your smallest ones.

To add your plants, create a small hole that will fit the base of your plant, pop it in and firm the soil around it. Continue this process until you’re happy with how it looks.

Step 6 - Decorate!

Now that you’ve added all your plants, think about adding some decorations such miniature ornaments, colourful crystals, or seashells – anything that will add some more visual interest to your terrarium. Once you're happy with your finished product, simply pop on your lid and marvel at your creation!