Best Plants For Terrariums: Closed Terrarium Plants That Thrive Indoors
- Bath Garden Center
- 4 hours ago
- 4 min read
The best plants for terrariums are small, tropical species that naturally grow in humid environments with filtered light and consistent moisture. Closed terrarium plants, such as fittonia, mosses, peperomia, and miniature ferns, thrive because they are adapted to conditions similar to those found inside a sealed glass container.
A well-designed closed terrarium creates its own miniature ecosystem. As moisture evaporates from the soil and leaves, it condenses on the glass and returns to the growing medium. When the right plants are selected, this cycle can support healthy growth with very little maintenance. The key is choosing plants that enjoy humidity and have modest growth habits so they do not quickly outgrow the space.
Whether you are creating your first terrarium or looking to improve an existing one, understanding which plants are suited to a closed terrarium can help prevent mold, overcrowding, and plant decline.
What Are The Best Closed Terrarium Plants For Beginners?
Many beginner-friendly terrarium plants naturally thrive in warm, humid conditions and remain relatively compact over time.
Fittonia, often called nerve plant, is one of the most popular closed terrarium plants. Its colorful, veined leaves add visual interest, and it enjoys the high humidity found inside enclosed containers.
Peperomia varieties are another excellent choice. Many remain small, tolerate moderate light, and adapt well to terrarium conditions. Their wide range of leaf shapes and textures makes them easy to incorporate into different designs.
Miniature ferns, including button ferns and lemon button ferns, thrive in humid environments and bring soft texture to terrariums. Mosses are also classic terrarium plants because they naturally grow in damp environments and help create a lush woodland appearance.
Other popular choices include baby tears (Soleirolia soleirolii), pilea species, and miniature selaginella. These plants remain relatively small while benefiting from the consistent moisture levels found in a closed terrarium.
Why Do Some Plants Thrive Better In Closed Terrariums?
Not every houseplant is suited for life inside a closed glass container. Plants that perform best in terrariums generally come from tropical forests where humidity levels are naturally high and direct sunlight is limited.
Closed terrariums create an environment with elevated humidity and reduced airflow. Plants adapted to these conditions can grow comfortably without experiencing moisture stress. Many tropical understory plants are accustomed to filtered light beneath a forest canopy, making them ideal candidates for indoor terrariums.
Plant size also plays an important role. Slow-growing or naturally compact species are less likely to become overcrowded. A plant that doubles in size quickly may look attractive at first, but it can soon overwhelm a small terrarium.
Successful terrariums often combine plants with similar light, moisture, and humidity requirements. This helps create stable growing conditions for every plant within the container.
What Plants Should Not Be Used In Closed Terrariums?
Some plants struggle in closed terrariums because they prefer dry conditions, brighter light, or more airflow than a sealed container can provide.
Succulents and cacti are among the most common mistakes in terrariums. While they are often sold in decorative glass containers, most succulents prefer dry soil, lower humidity, and excellent airflow. The moisture trapped inside a closed terrarium can lead to rot and decline.
Large-growing houseplants should also be avoided. Plants such as monstera, pothos, and larger philodendrons may quickly outgrow available space, leading to overcrowding.
Plants with significantly different care requirements should not be combined in the same terrarium. For example, mixing a moisture-loving fern with a drought-tolerant succulent often results in one plant thriving while the others struggle.
Avoiding fast-growing or humidity-sensitive plants helps create a healthier and more sustainable terrarium environment.
How To Arrange Closed Terrarium Plants For Healthy Growth
Plant arrangement plays an important role in the long-term success of a terrarium.
Start by placing taller plants toward the back or center of the terrarium, depending on the container shape. Lower-growing plants and mosses can then be used around the edges to create a layered appearance.
Allow enough space between plants for future growth. While a newly planted terrarium may look sparse at first, many terrarium plants gradually fill in over time.
Grouping plants with similar growth habits can help prevent one variety from overtaking another. Regular observation also allows you to trim or reposition plants before overcrowding becomes a problem.
A balanced combination of textures, colors, and heights often creates the most natural-looking terrarium while supporting healthy airflow around the foliage.
Find The Best Plants For Terrariums At Bath Garden Center
Choosing the right plants is one of the most important steps in creating a successful terrarium. At Bath Garden Center, we offer a wide selection of closed terrarium plants, including mosses, peperomia, ferns, and other humidity-loving varieties. Whether you are building your first terrarium or expanding an existing collection, our knowledgeable team can help you select the best plants for terrariums and create a thriving miniature ecosystem that brings natural beauty indoors.
Resources:
Oklahoma State University Extension. "Terrariums" https://extension.okstate.edu/fact-sheets/terrariums#plants
Pennsylvania State University Extension. "Creating a Closed Terrarium" https://extension.psu.edu/creating-a-closed-terrarium The University of Arizona Cooperative Extension. "The Terrarium – An Oasis of Humidity for Plants."
Clemson Cooperative Extension. "Indoor Plants – Terrariums."
