How To Make a Succulent Terrarium

Succulents are among the top-selling houseplants worldwide, with the global indoor plant market now valued at over $20 billion — and the terrarium trend is driving a huge chunk of that growth. If you want to learn how to make a succulent terrarium, you're in the right place. It's one of the easiest, most affordable weekend projects in indoor gardening. You don't need a green thumb, a large space, or expensive equipment. And if you've already tried making a closed terrarium, you'll find the open succulent version even more forgiving.

A succulent terrarium is an open-container garden filled with drought-tolerant plants layered over sand, gravel, and gritty soil. Unlike tropical terrariums, you leave it unsealed. You want airflow. Succulents are plants that store water in their leaves, stems, or roots, which makes them naturally resistant to neglect — a huge advantage when you're just starting out.

This guide covers everything from choosing your container to the exact layering method, the right plants for your experience level, and the most common mistakes beginners make. Truman Perkins has put this guide together so you can skip the trial-and-error phase entirely. For product and tool recommendations to help you get set up right, browse our gardening reviews section.

Everything You Need to Get Started

You don't need much to build your first succulent terrarium. A trip to a garden center or a quick online order is usually enough. The secret to a successful build is getting your materials right before you plant anything. Cutting corners on the base layers is where most beginners go wrong.

Picking the Right Container

Your container is the foundation of the whole project. You have more options than you'd think:

• Glass fishbowls or wide-mouth mason jars — inexpensive, easy to find, and look great on shelves
• Geometric open terrariums — excellent airflow and very visual; ideal for a display piece
• Old fish tanks or rectangular glass boxes — great for a larger, landscape-style display with multiple plants
• Shallow ceramic or clay bowls — work well if you drill a small drainage hole in the bottom

The most important rule: open top or drainage hole. Succulents rot in sealed, humid environments. Avoid anything with a lid you plan to keep closed. If you're curious about the sealed-container approach, our guide on how to make a closed terrarium covers that method — but it uses completely different plants and much higher humidity.

Your Full Materials Checklist

Gather these before you start planting:

• Open glass or ceramic container (no permanent lid)
• Coarse sand or fine gravel for the drainage layer
• Activated charcoal (filters bacteria, controls odor)
• Cactus and succulent potting mix
• Small succulents in 2–4 inch nursery pots
• Decorative top layer: white sand, colored pebbles, or fine gravel
• Optional accents: small stones, driftwood, or miniature figurines
• Long tweezers or chopsticks for planting in tight spots
• A small funnel or folded paper for placing sand cleanly

If you've filled planters or raised beds before, the layering logic carries over directly. Our guide on how to fill an outdoor planter covers the same drainage-first principle in a larger-scale context.

Choosing Plants for Your Skill Level

Not all succulents behave the same way in a terrarium. Some grow too fast and crowd out their neighbors. Some need more water than others. Match your plant choices to your experience level and you'll save yourself time and frustration.

Best Succulents for Beginners

These species are slow-growing, forgiving, and visually interesting even in a small container:

• Echeveria — classic rosette shape, dozens of color varieties, stays compact for a long time
• Haworthia — tolerates lower light than most succulents, ideal for indoor settings away from bright windows
• Sedum (stonecrop) — low and spreading, fills gaps well without overwhelming neighbors
• Crassula (jade plant) — upright tree-like form that adds height contrast in larger containers
• Aloe vera — iconic look, practical, just give it a little extra room to spread

If you want to branch out into the agave family, our guide on how to grow Agave Stricta covers a compact, spiky species that works well as a centerpiece in a wider terrarium setup.

More Ambitious Plant Combinations

Once you're comfortable with the basics, mix plant types for richer visual texture:

• Pair trailing Senecio (string of pearls) with upright Echeveria for a cascading waterfall effect over the container edge
• Combine a tall Crassula as a centerpiece, medium Gasteria in the midground, and low-spreading Sedum along the edges
• Use contrasting leaf shapes — round vs. spiky, flat vs. rosette — to create depth in a single container

Here's a quick comparison to help you decide which path fits your experience level right now:

If you enjoy low-maintenance indoor plants alongside your terrarium, our guide on how to grow a money plant covers another easy-care species that thrives in the same bright indoor conditions succulents prefer.

How to Make a Succulent Terrarium Step by Step

This is the core of the whole process. Follow these steps in order and your terrarium will have the right structure from day one. Skipping the base layers is the single biggest mistake beginners make — and it almost always ends in root rot.

Building Your Base Layers

1. Drainage layer first. Add 1–2 inches of coarse sand or fine gravel to the bottom of your container. This keeps standing water away from roots.
2. Activated charcoal next. Sprinkle a thin layer (about ½ inch) over the gravel. It filters water and prevents bacterial buildup that causes odors and disease.
3. Add your soil. Pour in at least 2–3 inches of cactus and succulent potting mix. More depth gives roots more room to grow. Tamp it down lightly — you don't want air pockets.

Never substitute regular potting soil here. It stays wet too long and will cause root rot within weeks. Cactus mix drains fast and mimics the dry, porous soil succulents naturally grow in.

Planting and Finishing Touches

1. Plan your layout before you commit. Set the plants — still in their nursery pots — on top of the soil and rearrange until you're happy with the look. Tall plants toward the center or back, low ones at the edges.
2. Remove plants from their pots. Gently shake off excess soil from the roots without damaging them.
3. Dig small planting holes and set each plant. Use tweezers or chopsticks in tight spots. Make sure roots are fully buried and the base of each plant sits at soil level.
4. Add your decorative top layer. Cover all exposed soil with sand, fine gravel, or small pebbles. This finishes the look and slows moisture evaporation from the surface.
5. Wait 48 hours before watering. Give roots time to settle in before their first drink. This reduces transplant stress significantly.

If you find yourself wanting to scale up your indoor growing setup beyond a single terrarium, our guide on how to make a small greenhouse walks you through building a controlled growing environment for a much larger plant collection.

Keeping Your Terrarium Healthy Long-Term

Building it is the easy part. The harder challenge is resisting the urge to over-care for it. Succulents suffer more from too much attention than too little. Here's what sustainable, long-term care actually looks like.

Watering Without Overdoing It

Overwatering kills more succulents than any pest or disease. Stick to these simple rules:

• Water only when the top inch of soil is completely dry — press your finger in to check
• In warm months, that's roughly every 2–3 weeks
• In cooler months, cut back to once a month or less
• Use a narrow-spout watering can and aim at the soil, not the leaves
• If water pools and doesn't absorb within an hour, your drainage layer needs attention

You rarely need to fertilize succulents, but a slow-release fertilizer stick can give them a seasonal boost. Learn how to make your own in our guide to making fertilizer sticks at home.

Light, Temperature, and Seasonal Adjustments

• Bright indirect light is ideal — a south- or east-facing windowsill works best for most species
• Most succulents need 4–6 hours of light per day to stay compact and healthy
• Avoid direct afternoon sunlight through glass — it acts like a magnifying lens and can scorch leaves quickly
• Keep temperatures between 60–80°F (15–27°C) for best results
• Rotate the container a quarter turn every few weeks so all plants get even light exposure

If a plant starts to stretch out and look leggy — a process called etiolation (when a plant grows long and spindly reaching for light) — move the terrarium closer to a window or add a small grow light on a timer. Catching this early makes recovery much easier.

For more on managing indoor light conditions across different plant types, our guide to growing avocado indoors covers light and temperature principles that apply to many low-maintenance houseplants.

Common Mistakes That Kill Succulent Terrariums

Most terrarium failures come down to a short list of repeatable errors. Knowing them now will save you money, time, and at least a few dead plants.

Container and Drainage Errors

• Using a sealed container. Succulents need airflow. A closed lid traps humidity and promotes fungal rot within weeks.
• Skipping the drainage layer. Without gravel and charcoal at the bottom, water sits in the root zone and suffocates your plants.
• Using regular potting mix. It stays wet too long. Cactus and succulent mix is not optional — it's foundational.
• Choosing a container that's too deep with no drainage hole. Excess water has nowhere to go, and roots stay saturated. Aim for a container that gives your drainage layer and soil together about 4–6 inches of depth.

Overcrowding and Wrong Plant Choices

• Planting too many succulents in a small space. They'll compete for nutrients and airflow. Leave at least an inch of space between plants.
• Mixing succulents with tropical plants. Tropical species need constant moisture. Succulents need dry conditions. They will stress each other out — one will always lose.
• Choosing fast-growing species for small containers. Some succulents outgrow a small terrarium in a matter of weeks. Stick to compact, slow-growing rosette types for tight spaces.
• Skipping a pest check before planting. Inspect every plant for mealybugs (small white, fluffy-looking insects) or scale before it goes into the terrarium. One infested plant can spread to all the others quickly once they're sharing soil.

Frequently Asked Questions

Key Takeaways

• Always build a proper base — gravel drainage layer plus activated charcoal — before adding any soil or plants, because this single step determines whether your terrarium survives long-term.
• Choose slow-growing, compact species like Echeveria or Haworthia when you're starting out, and only experiment with mixed combinations once you've mastered the basics.
• Water far less than you think you need to — letting the soil dry out completely between waterings is the most reliable way to keep succulents healthy.
• Keep the container open for airflow, place it in bright indirect light, and rotate it regularly so every plant gets even exposure throughout the growing season.