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Building a terrarium is about matching the plant to the glass world you have in mind — a sealed jar needs humidity lovers, an open dish needs drought-tolerant succulents, and a pet habitat needs non-toxic picks. The right small plant fills in fast and stays small, while the wrong one either rots in the moisture or outgrows the lid. This guide breaks down the best small plants for terrarium builds by the environment they actually live in, so you choose with confidence the first time.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
From humidity-loving ferns to soil-free air plants, here are the nine best small plants for terrarium setups, matched to the light, moisture, and space your glass world demands.
Our Picks at a Glance
How To Choose The Right Small Plants For Terrarium
Before you buy, decide whether your container is sealed or open — that one choice drives everything else. A closed terrarium traps humidity and suits ferns, moss, and tropical picks, while an open dish dries out fast and fits succulents and air plants.
Match moisture needs to your container
Check the listed moisture need on each plant. Pick “little to no watering” species like succulents for open, dry setups, and “moderate watering” varieties for sealed glass where the moisture cycles on its own.
Watch the expected plant height
A plant listed at 4 inches can brush the top of a small glass dome, while a 2-inch pick stays low in a shallow dish. Measure your container’s interior height and leave room for a soil layer plus the plant.
Consider light and temperature
Most terrarium plants want bright, indirect light rather than direct sun, which can cook the glass interior. Check the sunlight exposure note — full sun species behave very differently from partial shade ones inside glass.
Quick Comparison
| Model | Best For | Plant Height | Moisture Need | Piece Count | Amazon |
|---|---|---|---|---|---|
| Altman Plants Succulent 6-Pack★ Best Overall | Open, dry displays | 4 inches | Little to no watering | 6 | Amazon |
| ragnaroc Tillandsia IonanthaSoil-Free Pick | Soil-free mini gardens | 3 inches | Moderate watering | 5 | Amazon |
| Optiflora Mini Terrarium PlantsHumidity Lovers | Humidity-loving fairy gardens | — | Moderate watering | 2 | Amazon |
| Plants for Pets Air Plant 8-Pack | Low-light, pet-friendly spaces | 3 inches | Regular watering | 8 | Amazon |
| Hirt’s Gardens Terrarium Kit | All-in-one first build | — | — | 3 plants | Amazon |
| LUCKYRUNES Live Moss 4-Pack | Carpeting the terrarium floor | 1 inch | Moderate to high | 4 | Amazon |
| JM BAMBOO Terrarium Plants | Larger fairy gardens | 6 inches | Moderate watering | 6 | Amazon |
| Josh’s Frogs Vivarium Plant Kit | Crested gecko habitats | — | Moderate watering | 4 | Amazon |
| La Costa Mini African Violets | Mini blooms on a windowsill | 2 inches | Moderate watering | 3 | Amazon |
In‑Depth Reviews
1. Altman Plants Specialty Live Succulent Plant (6 Pack)
Our pick — 4.5★ from 11,000+ verified ratings; the strongest balance of quality and price.
Six drought-tolerant succulents that need almost zero attention, built for open terrariums and busy schedules.
Each 2-inch pot holds a different variety — Kalanchoe, Crassula, Portulacaria, Sedum adolphi, Sedeveria, and Graptosedum — so no two pots repeat and your glass dish looks like a curated collection. At a 4-inch expected height and just 12 ounces total for the set, these stay low enough for shallow bowls and light enough to arrange without shifting your soil layer.
You get a terrarium that looks great right away: around 1,500 owners praise the appearance, and health on arrival is a close second. Buyers report that plants arrive healthy even in cold weather thanks to sturdy, layered packaging — one reviewer wrote, “Arrived healthy despite cold; excellent packaging.” The trade-off is that the exact assortment is never guaranteed, so you might not get that one specific succulent you wanted to feature.
These suit open, dry terrariums where water evaporates between waterings. Skip them for a sealed jar — succulents rot in constant humidity.
What Wins Owners Over
- Genuinely unique colors and shapes across all six pots
- Drought-tolerant care fits a forgetful watering routine
- Healthy, rooted arrival reported even in cold shipping
Worth Knowing Before You Buy
- Assortment varies — no single variety is guaranteed
- Best in open containers, not humid sealed terrariums
Reach for these if: you want a no-fuss, variety-rich succulent dish that forgives missed waterings.
Look elsewhere if: your terrarium is a sealed jar, since high humidity will stress these drought lovers.
2. ragnaroc Air Plants – Tillandsia Ionantha Pack (5ct)
Five soil-free tillandsias that perch on driftwood or glass beads, needing only a weekly soak instead of potting mix.
These air plants grow to a 3-inch height and weigh just 4.8 ounces for the whole pack, so they float visually in a terrarium without crowding out your hardscape. The care is a simple weekly ritual: soak them in tepid water for 20-40 minutes, then let them dry fully within 2 hours — no dirt, no drainage layer, no repotting.
Owners praise the appearance most, with the top compliment being how pretty and healthy the plants arrive. The honest caveat is size: owners mention these come “much smaller than expected with 4 of them being the size of a 50 cent piece,” so expect a compact, dainty plant, not a lush centerpiece.
These are ideal for open terrariums, hanging glass orbs, or vertical wall gardens. They need indirect-to-bright light and good airflow, so skip them if your container is fully sealed.
Why they fit: They add sculptural, soil-free texture to glass displays and stay genuinely small at 1-3 inches.
The reality check: Expect petite plants — a few buyers were surprised by the tiny size, so measure your terrarium before committing.
3. Optiflora Mini Terrarium Plants (2 Plants)
Two humidity-happy plants bred for the damp, closed world of a fairy garden or glass terrarium.
These are the opposite of succulents in every way: they thrive in high-humidity environments like fairy gardens and sealed terrariums, or grow fine as standard houseplants in larger pots. They arrive in 2-inch pots with moderate watering needs, so they slot into a humid, closed ecosystem without demanding much from you.
Health is what owners rave about most: customers note the plants “arrived in very good condition and very much alive,” and one fan even planted them in a Metal Gear Solid collector’s edition terrarium. A happy surprise is that one plant can often be divided into two, stretching a 2-pack into 3 or 4 plants for multiple terrariums.
The catch is simply that you get two assorted varieties rather than a guaranteed lineup, and the plants are unlabeled — expect to identify them yourself or enjoy the mystery.
Where It Shines
- Built for the high-moisture air of sealed terrariums
- Healthy, well-packed arrivals reported even in winter
- One plant often splits into two, stretching your supply
Keep In Mind
- Varieties are assorted and unlabeled
- Only two plants per order, so plan repeats for a full look
Pick these if: your terrarium is a sealed, humid jar where moisture-tolerant ferns and tropicals belong.
Think again if: you need exact, named species for a themed or scientific build.
4. Plants for Pets Air Plant Low Light House Plants Box (8PK)
Eight soil-free, non-toxic air plants that tolerate low light, making them the most forgiving pick for dim rooms.
You get the most plants per order of any air plant pick here: 8 tillandsias (air plants that need no soil) at 3 inches tall, 16 ounces for the full set. They tolerate both bright and low light, a rare flexibility that lets you place them on corner shelves or in north-facing rooms.
Appearance earns the most owner enthusiasm: plants arrive pretty, healthy, and often already showing blooms. The trade-off is size and shipping: some owners found them “good-sized,” others noted they were very small, and a few received plants damaged in transit — so check your plants promptly on arrival.
Because these are non-toxic and pet friendly, they’re a confident choice for homes with cats or dogs who explore your shelves.
The smart buy: More plants per dollar and genuine low-light tolerance that most air plant packs can’t match.
Set expectations: Sizes vary within the box, and the occasional shipment arrives roughed up — inspect on day one.
5. Hirt’s Gardens Terrarium/Fairy Garden Kit with 3 Plants
A full build-your-own kit — three mini plants, moss, soil, and charcoal — that removes all guesswork for a first terrarium.
Weighing in at 2.1 pounds, this kit ships with 3 live miniature plants plus sheet moss, natural terrarium potting soil, carbonized charcoal, decorative mulch, and reindeer moss. You’re not just buying plants — you’re buying the entire foundation, which is why it’s the easiest starting point for a beginner who wants the whole ecosystem in one box.
The quality is what owners praise most, and the plants get high marks for arriving in excellent condition. Reviewers point out the healthiest plants they’ve purchased, with setups still thriving months later, and the clear instructions make it a fun project to build with kids. The fair warning is that plant varieties shift with the season, and a few owners noted one plant arriving too tall for their particular glass dome.
This is the pick to grab when you want to build today, not source components separately.
Why It’s A Great Start
- Everything included: plants, moss, soil, charcoal, and mulch
- Clear instructions make assembly simple even for kids
- High-quality plants reported thriving over months
Watch For
- Varieties change by season, so no guaranteed plant lineup
- One plant can outgrow a small dome — measure your glass first
Choose this if: you’re building your first terrarium and want a complete, simple to use kit rather than sourcing parts.
Pass if: you already have soil and moss and just need to add more plant variety to an existing setup.
6. LUCKYRUNES Live Moss 4-Pack for Terrariums
Four dye-free living moss sheets that carpet the terrarium floor and bring a lush mixed-green base to any glass world.
Each piece measures about 3.5 x 7 inches, forming a soft green floor that unifies your whole terrarium — the visual anchor that makes mini plants pop. At a 1-inch expected height, this moss stays flat and ground-hugging, ideal for closed terrariums, bonsai top dressing, and miniature landscapes.
The moss may arrive dry, compressed, or light brown from shipping — that’s normal, and a heavy mist brings it back to life. Shoppers say it perking up quickly with water, growing vibrantly, and still thriving after a month in their terrariums. The appearance earns the most praise, with buyers loving the natural, dye-free color, though a few noted that not every piece revived equally in their specific environment.
This is a layering product: use it to carpet the base, then add accent plants on top.
What it does best: Creates that lush, mossy terrarium floor that instantly reads as a real landscape.
Care note: Keep it moist, avoid direct sun, and expect to mist it back to life after the journey.
7. JM BAMBOO Terrarium & Fairy Garden Plants (6 Plants)
Six mixed-species plants in 2-inch pots, each running 4 to 6 inches tall, built for roomier fairy gardens.
This is the tallest pick on the list — plants arrive around 4 to 6 inches — so it suits larger glass containers and open fairy gardens where you want vertical presence. They’re listed for moderate watering in sandy soil with full sun to partial shade flexibility, making them adaptable to a range of terrarium spots.
Health is the standout trait here, with the most owner praise going to how plump, green, and lively the plants arrive, and many noting the six-pack offers great variety. The honest size warning: several buyers found the plants “too large for miniature gardens,” and one seasonal shipment had only 4 of 6 plants survive — so treat this as a pick for bigger builds, not tiny jars.
Because species vary by season, you get a rotating mix rather than a fixed lineup, which keeps things interesting but means you can’t plan an exact palette.
The Strong Points
- Six different species give instant, varied fullness
- Healthiest-arriving plants reported, plump and green
- Taller growth suits larger fairy garden containers
The Honest Limits
- Too tall for miniature or small sealed terrariums
- Seasonal variety means an unpredictable mix
Reach for this if: you’re filling a large glass container or open fairy garden and want instant fullness from multiple species.
skip it if: you’re working with a small jar where 6-inch plants will hit the lid.
8. Josh’s Frogs 18x18x18 Crested Gecko Vivarium Plant Kit
A 4-plant kit — one tropical, one vine, one bromeliad plus an extra — curated to thrive inside a vivarium.
This kit was built with small tanks in mind, shipping 4 plants in 2.5-inch pots specifically arranged for a crested gecko’s environment. The mix of one tropical, one vine, and one bromeliad gives your enclosure both height and texture, and the moderate watering needs match the humid conditions a vivarium naturally creates.
Owners consistently report healthy plants arriving in great condition and thriving inside their gecko’s home, with the health being the most-praised aspect. The kit weighs just 11.2 ounces, so it’s light enough for a clean install. The fair warning is that the plants are starter-sized — a few buyers found them smaller than expected — and shipping can run late, so plan ahead rather than waiting until the gecko moves in.
This is the pick when your terrarium is really a reptile habitat, not just a glass decoration.
Built for a purpose: Biologically appropriate picks — tropical, vine, and bromeliad — for a humid vivarium.
Plan for: Starter sizes and occasional shipping delays; order a week ahead of need.
9. La Costa Plants Live Miniature African Violet Plants (3-Pack)
Three blooming miniature violets in 2-inch pots that add color and flowers, not just green, to a small display.
These are the flowering accent pick of the list — miniature African violets with shades of purple, pink, blue, and green foliage, staying just 2 inches tall. They’re low maintenance, preferring bright indirect light, and known for blooming for several months at a stretch, making them the most colorful option for a windowsill terrarium or desk display.
The blooms are what owners can’t stop talking about: plants arrive budding and flowering, packed snugly, and described as perfect. One owner even runs them under a full-spectrum light in a paludarium. The trade-off is that violets are the least “terrarium-typical” pick here — they do best in bright indirect light with regular watering rather than sealed humidity, so treat them as an open-dish bloomer.
These deliver color that every other plant in this list simply can’t.
What Makes It Special
- Actual flowers with assorted purple, pink, and blue tones
- 2-inch height fits compact spaces beautifully
- Blooms last for months, per owner reports
Consider First
- Prefers open, bright-indirect setups over sealed humidity
- Assorted colors mean you can’t choose exact shades
Choose these if: you want a flowering, colorful centerpiece for an open terrarium or windowsill display.
Look elsewhere if: your build is a sealed jar where tropical humidity lovers will do better.
Understanding the Specs
Moisture Needs
This is the single most important spec for a terrarium plant. Succulents with “little to no watering” needs belong in open, dry dishes where the soil dries between waterings. Plants with “moderate watering” needs — like ferns, tropicals, and moss — suit sealed jars where humidity recirculates and the soil stays evenly damp.
Expected Plant Height
The listed height in inches tells you how much vertical room the plant will claim inside glass. A 2-inch violet stays low and framed by the container, while a 6-inch JM BAMBOO plant can push against a small dome lid. Measure your container’s interior and subtract your soil layer before picking a height.
FAQ
Can I mix succulents and ferns in the same terrarium?
Do air plants need soil to grow in a terrarium?
Why did my moss arrive brown or dry?
How many plants do I need for a small terrarium?
Are these plants safe around pets?
Can African violets grow in a sealed terrarium?
What soil should I use inside my terrarium?
How much light do terrarium plants really need?
Final Thoughts: The Verdict
If you want one dependable pick, the small plants for terrarium winner is the Altman Plants Succulent 6-Pack because it delivers six unique, drought-tolerant plants that arrive healthy and need almost no care. If you want a sealed humid build, grab the Optiflora Mini Terrarium Plants for moisture-loving varieties. And for a complete first build with everything included, the Hirt’s Gardens Terrarium Kit is the one to reach for.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Gardening Beyond earns from qualifying purchases. This does not affect which products we feature.