An open terrarium is a type of terrarium that features an open top, allowing for greater air circulation and less humidity compared to closed terrariums. These terrariums are particularly suited for plants and environments that thrive in drier conditions with good airflow.

Open Top: No lid or covering, providing free exchange of air with the surrounding environment.
Air Circulation: Enhanced airflow helps prevent excess moisture and mould growth.
Humidity Control: Naturally lower humidity levels, making it ideal for plants that prefer drier conditions.

BENEFITS OF AN OPEN TERRARIUM

Open terrariums reduce the risk of excess humidity, which can lead to mould, mildew, and fungal growth. They provides a suitable environment for succulents, cacti, and other xerophytes that thrive in dry conditions. Improved airflow helps to reduce stagnant air, promoting healthier plant growth and reducing the likelihood of pest infestations.
Open terrariums can better handle temperature fluctuations, as they allow heat to dissipate more easily.
Easier to water and tend to plants without the need to remove a lid. Less concern about condensation and mold buildup.
Open terrariums often have a more modern and sleek appearance, making them an attractive addition to home decor. They can be styled more freely without the visual barrier of a lid, enhancing their visual appeal.

IDEAL PLANTS FOR OPEN TERRARIUMS
Succulents like Echeveria, Haworthia, Aloe, and Sedum. These plants store water in their leaves, making them well-suited for the dry conditions of an open terrarium.
Cacti like Mammillaria, Opuntia, and Rebutia thrive in low-humidity environments and need good airflow to prevent rot.
Air Plants (Tillandsia): These plants can be placed in open terrariums to take advantage of the good airflow and minimal soil requirements.
Herbs such as Basil, Thyme, and Rosemary. Many herbs prefer dry conditions and good air circulation, making them suitable for open terrariums.

MAINTENANCE TIPS FOR OPEN TERRARIUMS
Water sparingly and ensure the soil dries out between waterings to prevent root rot.
Provide bright, indirect light. Succulents and cacti may need more direct sunlight.
Use well-draining soil mixes, such as cactus or succulent soil, to prevent waterlogging.
Regularly remove dead leaves and debris to prevent mould and pest issues.

Conclusion
Open terrariums offer several benefits, especially for plants that thrive in dry, well-ventilated environments. They are easier to maintain, help prevent issues related to excess humidity, and can accommodate a variety of attractive, low-maintenance plants like succulents and cacti. This makes them an excellent choice for both novice and experienced plant enthusiasts looking to create a beautiful and sustainable plant display.