Benefits of a Closed Terrarium

A closed terrarium is an enclosed environment that creates a self-sustaining ecosystem with its own microclimate. This type of terrarium is particularly suited for plants that thrive in high-humidity environments. Here are the benefits of a closed terrarium:

1. Self-Sustaining Ecosystem

  • Benefit: Closed terrariums can create a self-sustaining environment where water cycles naturally through condensation and evaporation.
  • Advantage: This minimizes the need for frequent watering, as the closed system recycles moisture.

2. High Humidity

  • Benefit: The enclosed space traps moisture, maintaining a consistently high humidity level.
  • Advantage: Ideal for tropical plants and humidity-loving species such as ferns, mosses, and orchids, which thrive in these conditions.

3. Stable Environment

  • Benefit: Closed terrariums provide a stable environment with less fluctuation in temperature and humidity.
  • Advantage: Beneficial for delicate plants that require consistent conditions to grow well.

4. Minimal Maintenance

  • Benefit: Once established, closed terrariums require minimal maintenance.
  • Advantage: The need for watering is significantly reduced due to the natural water cycle within the terrarium, making it easier to care for over time.

5. Educational Value

  • Benefit: Closed terrariums serve as excellent educational tools, demonstrating principles of ecology, the water cycle, and plant biology.
  • Advantage: They can be used to teach children and adults about ecosystems, sustainability, and plant care in a hands-on manner.

6. Aesthetic Appeal

  • Benefit: Closed terrariums create a lush, miniature landscape that can be very aesthetically pleasing.
  • Advantage: They can serve as attractive, low-maintenance decorative pieces for homes, offices, or public spaces.

7. Protection from Pests

  • Benefit: The enclosed environment protects the plants from common pests such as aphids and spider mites.
  • Advantage: Reduces the need for pest control measures and keeps the plants healthier.

8. Microclimate Control

  • Benefit: You can control the microclimate within a closed terrarium more easily than in an open environment.
  • Advantage: Allows for the cultivation of a diverse range of plants that may not thrive in the ambient conditions of a typical home.

9. Reduced Evaporation

  • Benefit: The enclosed system significantly reduces water evaporation.
  • Advantage: Conserves water and ensures plants have a consistent moisture supply, which is particularly beneficial in dry climates or for people who travel frequently.

10. Encourages Root Growth

  • Benefit: The humid environment promotes healthy root growth for many plant species.
  • Advantage: Plants with well-established root systems tend to be healthier and more resilient.

Ideal Plants for Closed Terrariums

  1. Ferns
    • Examples: Maidenhair fern, Boston fern.
    • Benefits: Thrive in high humidity and low light conditions.
  2. Mosses
    • Examples: Sheet moss, Cushion moss.
    • Benefits: Prefer constant moisture and high humidity.
  3. Orchids
    • Examples: Miniature orchids, Phalaenopsis.
    • Benefits: Appreciate the stable, humid environment.
  4. Peperomias
    • Examples: Peperomia obtusifolia, Peperomia caperata.
    • Benefits: Enjoy the humidity and grow well in low to moderate light.
  5. Pothos
    • Examples: Golden pothos, Marble queen.
    • Benefits: Tolerant of low light and high humidity, making them ideal for closed terrariums.
  6. Fittonia (Nerve Plant)
    • Examples: Fittonia albivenis.
    • Benefits: Requires high humidity and consistent moisture, and thrives in the conditions provided by closed terrariums.

Maintenance Tips for Closed Terrariums

  1. Watering:
    • Water sparingly. The goal is to keep the soil moist but not soggy. The closed system recycles water, so overwatering can lead to mold and root rot.
  2. Lighting:
    • Provide indirect light. Direct sunlight can cause overheating and condensation. LED grow lights can be used to supplement natural light if necessary.
  3. Ventilation:
    • Occasionally open the lid to allow fresh air exchange and prevent mold buildup. This can be done every few weeks.
  4. Pruning:
    • Regularly prune plants to prevent overcrowding and remove dead leaves to maintain a healthy environment.
  5. Cleaning:
    • Keep the glass clean to ensure adequate light penetration and maintain the aesthetic appeal.


Closed terrariums offer numerous benefits, particularly for plants that thrive in humid, stable environments. They require minimal maintenance, create a visually appealing display, and can serve as educational tools. By selecting the right plants and providing proper care, a closed terrarium can be a thriving, self-sustaining ecosystem that enhances any indoor space.