Terrariums are a beautiful way to bring greenery indoors, but choosing between a closed vs open terrarium can be confusing for beginners. Each type has its own plants, care routine, and benefits.
In this guide, we’ll clearly explain closed vs open terrariums, their differences, plant choices, maintenance needs, and which option is best for your home.
What Is a Terrarium?
A terrarium is a miniature indoor garden grown inside a glass container. It creates a controlled environment that supports plant growth with minimal maintenance.
What Is a Closed Terrarium?
A closed terrarium is sealed or mostly sealed with a lid, creating a self-sustaining ecosystem.
How Closed Terrariums Work
- Water evaporates
- Condenses on glass
- Drips back into the soil
This natural cycle keeps plants hydrated.
✔ Advantages of Closed Terrariums
- Requires minimal watering
- High humidity environment
- Great for tropical plants
- Low maintenance
❌ Disadvantages of Closed Terrariums
- Risk of mold if overwatered
- Limited plant options
- Needs occasional airing
🌱 Best Plants for Closed Terrariums
- Moss
- Fittonia (Nerve Plant)
- Ferns
- Selaginella
- Mini Syngonium
What Is an Open Terrarium?
An open terrarium has no lid and allows free air circulation, making it suitable for dry-loving plants.
✔ Advantages of Open Terrariums
- Better airflow
- Less risk of mold
- Easier to manage
- Ideal for dry plants
❌ Disadvantages of Open Terrariums
- Needs more frequent watering
- Not self-sustaining
- Plants dry out faster
🌵 Best Plants for Open Terrariums
- Succulents
- Cacti
- Haworthia
- Peperomia
- Air plants
Closed vs Open Terrariums – Key Differences
| Feature | Closed Terrarium | Open Terrarium |
| Lid | Yes | No |
| Humidity | High | Low |
| Watering | Rare | Regular |
| Plant Type | Tropical | Succulents, dry plants |
| Maintenance | Low | Medium |
Which Terrarium Is Best for Indoors?
Choose a Closed Terrarium If:
✔ You want low maintenance
✔ You like lush greenery
✔ You have low to medium light
Choose an Open Terrarium If:
✔ You prefer succulents or cacti
✔ You have bright light
✔ You enjoy regular plant care
Light Requirements for Both Terrariums
- Bright indirect light is ideal
- Avoid direct sunlight (can overheat)
- Rotate terrarium occasionally
Common Terrarium Mistakes to Avoid
❌ Mixing succulents with tropical plants
❌ Overwatering closed terrariums
❌ Using direct sunlight
❌ Ignoring airflow
Final Thoughts
Understanding closed vs open terrariums helps you choose the perfect setup for your lifestyle and space. Closed terrariums offer a low-maintenance, jungle-like feel, while open terrariums are perfect for minimalist, dry-plant lovers.
Both styles can be beautiful, the key is choosing the right plants and care routine.
