How to Make a Terrarium for Succulents

By Michael Chen · January 24, 2026

How to Make a Terrarium for Succulents: Quick Answer

Making a terrarium for succulents involves selecting a well-draining container, using a porous soil mix, adding drainage layers, choosing healthy low-water plants, and placing the setup in bright, indirect light. Avoid sealed glass containers; opt for open tops to prevent excess moisture buildup, which can lead to rot.

Why Succulent Terrariums Are Unique

Succulents thrive in dry, arid environments with excellent airflow—conditions that conflict with traditional closed terrariums designed for humidity-loving plants. Therefore, creating a successful succulent terrarium requires modifications to standard practices.

Key Challenges of Growing Succulents in Terrariums

High humidity promotes fungal growth and root rot
Poor air circulation traps moisture around the plant
Overwatering is more likely due to limited evaporation
Condensation blocks light and encourages mold

Choosing the Right Container

The container is the foundation of your terrarium. Unlike ferns or mosses, succulents need an open-top vessel to allow airflow and reduce humidity.

Recommended Container Types

Open glass bowls or dishes: Provide maximum ventilation
Geometric terrariums with wide openings: Stylish and functional
Repurposed jars with lids removed: Eco-friendly option if lid stays off

Avoid These Containers

Closed glass domes (retain too much moisture)
Narrow-neck bottles (limit airflow and make maintenance hard)
Containers without drainage holes (increase water retention risk)

Essential Materials and Tools

To build a healthy succulent terrarium, gather these supplies before starting:

Material	Purpose	Recommended Option
Container	Holds all layers and plants	8–12 inch diameter open glass dish
Drainage layer	Prevents root saturation	Small pebbles or lava rock (0.5–1 inch deep)
Aeration layer	Separates soil from drainage	Horticultural charcoal (½ inch layer)
Growing medium	Supports roots and drainage	Cactus/succulent mix + perlite (2:1 ratio)
Succulent plants	Main decorative element	Echeveria, Haworthia, Sedum (3–5 small plants)
Tweezers & spoon	For precise planting	Metal tweezers and mini trowel

Step-by-Step Guide to Building Your Terrarium

Step 1: Add Drainage Layer

Place a ½ to 1-inch layer of clean pebbles or gravel at the bottom. This prevents water from pooling around roots.

Step 2: Incorporate Charcoal Layer

Add a thin (¼–½ inch) layer of activated horticultural charcoal. It filters impurities and reduces bacterial and fungal growth.

Step 3: Add Soil Mix

Use a cactus or succulent-specific potting mix. Enhance drainage by mixing in perlite or pumice (one part perlite to two parts soil). Fill to 1.5–2 inches deep, depending on root size.

Step 4: Plant Your Succulents

Arrange plants while still in pots, then remove gently. Use a spoon to dig holes and tweezers to position roots. Space them 1–2 inches apart for growth room.

Step 5: Top Dressing (Optional)

Add a decorative surface layer like sand, colored stones, or crushed granite. This improves aesthetics and minimizes soil splash.

Step 6: Initial Watering

Wait 3–5 days after planting before watering to let any root damage heal. Then, lightly moisten the soil—never saturate.

Best Succulent Varieties for Terrariums

Not all succulents tolerate confined spaces. Choose compact, slow-growing species with high drought tolerance.

Succulent Species	Max Height (inches)	Light Needs	Water Frequency	Spread Tendency
Echeveria elegans	6	Bright, indirect	Every 2–3 weeks	Low (rosette-forming)
Haworthia fasciata	5	Medium to bright	Every 3 weeks	Very low (clumping slowly)
Sedum rubrotinctum	8	Full sun preferred	Every 2 weeks	High (spreading)
Crassula ovata (dwarf)	6–10	Bright, direct	Every 3 weeks	Low to moderate
Graptoveria 'Moonglow'	6	Bright indirect	Every 2–3 weeks	Low

Table data source:1, 2

The data shows that Haworthia fasciata and Echeveria elegans are ideal for small terrariums due to their compact size and infrequent watering needs. Avoid fast-spreading types like Sedum rubrotinctum unless you plan regular pruning.

Care Tips for Long-Term Success

Light Requirements

Place your terrarium in a spot with 4–6 hours of bright, indirect sunlight daily. South or east-facing windows work best. Rotate the container weekly for even growth.

Watering Guidelines

Use the “soak and dry” method: water only when soil is completely dry
Apply water directly to soil, avoiding leaves to prevent rot
In winter, reduce frequency to once a month

Fertilizing Schedule

Feed sparingly: apply diluted cactus fertilizer (half strength) once in spring and once in summer. No feeding is needed in fall and winter.

Pruning and Maintenance

Trim overgrown stems or dead leaves with sterilized scissors. Remove fallen debris to prevent mold. Repot every 18–24 months to refresh soil and check root health.

Common Mistakes to Avoid

Using regular potting soil: Retains too much moisture—always use a gritty mix
Overwatering: The #1 cause of succulent death in terrariums
Crowding plants: Limits airflow and accelerates disease spread
Placing in low light: Causes etiolation (stretching) and weak growth
Ignoring condensation: If walls fog regularly, it’s too humid—switch to a more open container

Frequently Asked Questions About Succulent Terrariums

Can I use a closed jar for a succulent terrarium?

No, closed jars trap moisture and create high humidity, which leads to root rot and fungal infections. Always use open containers that allow air circulation for succulents.

How often should I water my succulent terrarium?

Water every 2–3 weeks during growing season (spring/summer), only when the soil is completely dry. In winter, reduce to once a month. Always check moisture levels before watering.

Do succulent terrariums need drainage holes?

While not mandatory, drainage holes help prevent water accumulation. If your container lacks holes, ensure a thick gravel layer and exercise strict watering control to avoid overwatering.

Why are my succulent’s leaves turning yellow or mushy?

This is typically a sign of overwatering or poor drainage. Remove the affected plant, trim rotted roots, let it dry for 2–3 days, and replant in drier, grittier soil with better airflow.

Can I add decorative elements like figurines or colored sand?

Yes, but ensure decorations don’t block airflow or retain moisture. Use sparingly—excessive top dressing can hinder gas exchange. Avoid organic materials like wood that may decay and promote mold.