Terrariums are miniature ecosystems enclosed in a glass container. They are completely self-sustaining and are the perfect environment for growing a range of plants. To ensure the success of your terrarium, and ensure it thrives for many years to come, it’s important to choose the right soil or compost.

At London Terrariums we have been perfecting our secret terrarium compost mix for many years, but if you want to get your hands dirty you can create your own using the following components:

Sterile Potting Mix

A good quality sterile soil is necessary to prevent the introduction of harmful microorganisms that can disrupt the delicate balance within your terrarium's ecosystem. Look for a mix that is well-draining, PH-balanced and peat free. We love using a coir base for our terrariums. 

Worm Castings

Worm castings are naturally full of organic matter that is nutrient-rich, providing essential plant nutrients. 

Bark, Vermiculite or Perlite

Adding Bark, Vermiculite or Perlite to your mix greatly improves aeration, reduces compaction and improves drainage in your soil. 

Activated Charcoal

Activated charcoal, in granulated form, serves as a natural filter for excess moisture and helps control odors in closed terrariums. It also helps to prevent the growth of mold and algae. 

Sphagnum Moss

Also known as peat moss, sphagnum moss helps provide excellent moisture retention and aeration, promoting root health and overall plant growth. It also has natural antimicrobial properties to help prevent soil-borne diseases. 

We sell pre-mixed terrarium compost on our website and in-store.  Or you can buy one of our terrarium kits.