Interactive Builder

Pick a clear glass vessel with an opening wide enough to plant comfortably. The most important decision at this stage is open vs. closed — closed lids trap humidity for tropical plants, while open tops suit succulents and cacti that need airflow. Geometric terrariums, apothecary jars, and glass globes are all excellent choices.

Cover the base with drainage pebbles or LECA clay balls. This layer sits below the soil and creates a reservoir for excess water, preventing the root rot that kills most beginner terrariums. Aim for about 2–3 cm — enough to hold water without taking up too much planting depth.

A thin layer of mesh cloth or horticultural fleece between drainage and soil stops substrate from sifting down over time and turning your drainage layer into mud. It's a small step that makes a visible difference after a few months.

Use a moisture-retentive tropical mix (peat, perlite, coco coir) for closed builds, or a fast-draining cactus mix for open succulent terrariums. Depth matters — roots need at least 5 cm to anchor properly and access nutrients without sitting in waterlogged soil.

Use odd-numbered groupings (3 or 5 plants) for the most natural look. Place taller plants toward the back, lower spreading plants at the front. Remove as much original potting soil from roots as possible before planting — this avoids introducing pests and ensures consistent moisture across your substrate.

Cover exposed soil with sheet moss, decorative sand, or polished pebbles to finish the look and retain moisture. Add crystals, driftwood, or mini figurines to bring personality to the design. This is the layer that transforms a plant arrangement into a terrarium worth displaying.