Terrarium A–Z: The Beginner Knowledge Index
Terrarium A–Z is a guided index to our growing knowledge library. Start with a term or question, follow the related article, then return here to explore another topic. Articles are based on referenced horticultural guidance and do not claim original experiments.
A–D: Getting the foundations right
- Activated charcoal
- Optional material sometimes included in terrarium substrates; not a remedy for waterlogging. Understand substrate layers.
- Closed terrarium
- A lidded container that retains humidity. Build your first closed terrarium.
- Condensation
- Droplets on glass caused by cooling humid air. Understand the water cycle.
- Containers
- Glass jars, opening size, lids and maintenance access. Choose a container.
- Drainage layers
- Stones and separators do not remove water from a sealed jar. Explore soil layers.
E–L: Understanding your environment
- Etiolation
- Stretched growth that can indicate inadequate light. Terrarium lighting guide.
- Fittonia
- A popular humidity-loving tropical foliage plant. Compare suitable plants.
- Glass overheating
- Strong direct sun can raise temperatures dangerously. Where to place the jar.
- Humidity
- Water vapour in air; important for tropical plants. Compare open and closed designs.
- Light
- Energy source for photosynthesis, best judged for each species. Lighting explained.
M–R: Maintenance and problems
- Maintenance
- Observation, occasional pruning and debris removal. Monthly checks.
- Mold
- Fungal growth on moist organic matter; identify causes before acting. Mold troubleshooting.
- Moss
- Small plants with species-specific moisture and light needs. Make a moss display.
- Open terrarium
- A display with regular exchange of air. Open vs closed.
- Root rot
- Root damage and decay with several possible causes. Diagnostic guide.
S–Z: Supplies and water
- Springtails
- Small invertebrates sometimes kept in bioactive enclosures. Read about mold and decomposers.
- Substrate
- The growing medium supporting roots and moisture management. Substrate explained.
- Tools
- Common household implements and optional equipment. Tools checklist.
- Transpiration
- Movement of water vapour from plants into air. Water cycle explained.
- Watering
- Should be based on actual conditions rather than a fixed schedule. When to water.
Not sure where to begin?
Visit the guided Terrarium Learning Hub for a recommended reading path. Prefer to make something? Start with the beginner project.
Sources and methodology
This index points to individual articles that explain their research basis. A general reference is the Royal Horticultural Society’s terrarium guide. Entries are educational summaries, not proof of first-hand testing.