After you’ve mixed your soil, it’s time to build the terrarium. Years of practice (and a few mistakes) taught me that simplicity and precision matter more than the height of each layer. Each layer has a job, and more is not necessarily better. Drainage Layer The drainage layer’s sole purpose is to create permanent air space so excess water has somewhere to go. It doesn’t “drain” water out; it keeps water away from plant roots. Use small lava stones, pea gravel, LECA, crushed granite or small...

From years of experimenting and trial‑and‑error, I’ve learned that a balanced, thriving terrarium leans on two pillars: the soil mix and the tiny critters that keep it in check. This post focuses on the soil. A good terrarium mix should be well aerated, drain easily, and stay rich in nutrients for the long haul. I’ve been keeping terrariums since 2019, and these are the ingredients and proportions that work for me. Why I Mix Instead of Layer Terrarium soil mix is typically a combination of...

Not all movement in a terrarium is a problem. In fact, some of it is essential. The tiny white insects you may notice moving through the soil are called springtails . Springtails are a beneficial part of a healthy terrarium ecosystem . They feed on fungi, mold and decaying organic matter, helping maintain microbial balance and prevent outbreaks before they become visible. Most springtails are so small they’re barely noticeable, and that’s exactly how they should be. Their presence is a sign...