Mossarium: Everything You Need To Know

Hello all, welcome back to another unique vivarium post! Since our terrarium post was so well received, we decided to take a deeper dive into the Mossarium.

Today we’ll cover what moss terrariums are, how to make one & proper care tips for maintaining a moss terrarium. Mossariums have always been a thing in the east but very recently have begun to gain popularity within western civilization.

What Is a Mossarium?

A mossarium, also commonly referred to as “mossaria”, is a clear enclosure used to grow specifically moss. The prefix Moss is a mass of small, flowerless, rootless plants that grow in clumps together. 

Mossarium, as a word, would translate to “a container of moss.” Mossaria would be used to describe multiple moss terrariums or a room dedicated to the rootless plant.

Making A Moss Terrarium

Making a mossarium is a fun and easy vivarium project to start. Compared to other plants, moss can be on the relatively low end of the demanding spectrum. The key layers for a moss terrarium are very easily obtainable but vital to the longevity of your moss terrarium.

Proper Drainage

This layer of the setup usually consists of some type of earthy material, like gravel, rocks, and activated charcoal. This area is important because it provides an easy way for stagnant water to escape, providing a filter for the substrate layer.

The Ultimate Bioactive Terrarium Drainage Layer Guide

Allowing water to settle down here helps keep the humidity levels stable within the enclosure. This layer also serves as a good spot for healthy bacteria to thrive and break down unhealthy chemicals like ammonia.

The Substrate Layer

This layer of the mossarium is made up of some type of growing media. In most cases, it contains soil like coco coir or potting mix. You will want something that is easy for the moss to attach to. This layer should be kept moist at all times.

Terrarium Soil: The Most Complete Guide | Bantam.Earth

Healthy bacteria reside in this layer and aid with the breakdown of nutrients that the moss will absorb as a bonus.

The Hardscape Layer

The hardscape may or may not be a part of a moss terrarium.  In many cases, it will act as the substrate together since moss can grow on many types of surfaces. This will consist of either some type of rock and/or wood.

Using either material will have an effect on the mossarium so try to lean towards acidic hardscapes. Learn more about the importance of hardscaping in this article to understand what stones or wood should be considered.

Terrarium Rocks: The Most Definitive Guide | Bantam.Earth

Adding Moss

The Moss layer of the mossarium is the moss itself. Decorations are a nice complement to this layer as well. Moss will help retain moisture in the substrate if done correctly. If any additional plants are added to the mossarium, be sure to remove any fallen leaf litter found around this layer.

I put together a giant list of possible mosses great for moss terrariums I definitely recommend checking out.

Complete List Of Terrarium Moss & Care Guide Tips | bantam.earth

The Lighting

Lighting is a very important aspect of a moss terrarium. In fact, it is probably the single most important feature! Without light, your plants will not be able to produce energy from photosynthesis.

Terrarium Lighting: The Most Complete Guide

Use indirect sunlight or artificial low lighting since moss thrives in shaded areas in the wild. I recommend LED lighting, but you can also use fluorescent lighting as well.

Moss Terrarium layers

Different Types of mossariums

There are mainly three general types of mossariums to consider when building this type of terrarium. It will either be the traditional terrain type setup, fully aquatic, or a combination of both.

The moss required will vary depending on the type of mossarium you decide to go with. The essential key layers will change based on the type of mossarium it is as well.

Different Types Of Mossariums

Moss Terrariums

Moss terrariums are usually what come to mind when thinking about the conventional mossarium. This type of enclosure requires all the key layers we covered in the previous section except the substrate layer. Moss can do exceptionally well without soil since it doesn’t actually have roots.

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It’s actually common to find a mossarium that consists of a large rock or wood log as a base for moss to grow on, instead of soil. If you are designing a substrate-less terrarium, be sure that the drainage layer is completely functional and the moss isn’t left sitting in stagnant water.

Air circulation will be vital to this setup so be sure to make sure fresh air is finding its way into the container frequently. If this will be a closed terrarium type of setup, remove the lid a couple of times a week or install a fan near ventilation to allow humidity levels to lower if you notice condensation forming around the glass.

Moss Aquariums

Moss aquariums are a bit new to the hobby but just as rewarding. Aquatic mossariums consist of a lighting layer, a moss layer, as well as a substrate layer. Drainage or air circulation won’t be a necessary factor with this setup since the tank will be completely immersed in water.

Make A Mini Shot Glass Aquarium

Humidity will not be an important aspect of a moss aquarium as well and one might consider making this a sealed container to retain evaporation. Water changes should be virtually none existent since the particular moss will work as a natural filter making this a self-sustaining ecosystem.

Moss Paludarium

Moss paludariums are something we predict will become very popular in the near future. The idea of combining the best of both worlds is not only amusing but aesthetically pleasing. The lighting and moss are the only essential layers here. The substrate and drainage layers will depend on personal preference and the style of the overall design.

Make A Coastal Village Aquatic Cliffside Terrarium

Air circulation will be vital for a moss paludarium. Even though having aquatic features will create the desired humidity necessary for terrain moss, you will still ventilation of some sort to allow proper humidity regulation as well as airflow.

Mossarium Care Tips

Caring for a mossarium is pretty basic once the moss is established. Moss is a relatively hardy plant to care for but does require some upkeep. Moss requires low ph levels, some light, and lots of moisture.

  • Water parameters are something many might overlook when it comes to moss. Moss thrives in ph between 5.0 and 6.0… A healthy mossarium will need to be acidic in order for moss to absorb the necessary nutrients.
  • Low indirect lighting or LEDs set to low will be the best-case scenario to mimic what it looks for in nature. Remember that moss grows in shaded areas in the wild. Direct sun or too much lighting will result in the moss burning and potentially drying out.
  • Humidity and airflow will be another necessary aspect of your mossarium. Moss will absorb the majority of its nutrients from the water in the air since it doesn’t have roots. Airflow will allow fresh air to circulate new nutrients throughout the plant. Be very careful not to drown the moss in water either. Moss will not do as well sitting in standing water or humidity higher than 80%.
Mossarium Care Tips

How To Revive Dried Moss

I think one of the most spectacular aspects of moss is its ability to regenerate. It’s like the Deadpool of plants! As long as it hasn’t been chemically treated, its spores will spawn under the right conditions. There are records of moss found in herbariums, hundreds of years old, that would begin to regrow once given enough water and light.

If you are having trouble trying to spark the growth of brown or completely dried moss, try grinding it into powder and mixing it with buttermilk. This will create a potent mixture of pancake-like batter you can paint or spray over the area you want to grow moss in. Consistently adding low ph, sodium-free water, and light should produce growth within a couple of weeks.

This is also a great method when applying moss to soil-less surfaces like stone, brick, or concrete. If you wanted to experiment outside the mossarium realm, try painting patterns or letters on a wall and watch as it slowly comes to life!

Different Types Of Moss

There are over 10,000 types of moss (Bryophyta) species found around the world. When deciding on the ideal moss to stock your mossarium with, there are a few popular species we will cover today. Mosses all have their own individual needs, so try picking a type that fits the overall design and style of your moss terrarium.

Best Types Of Moss For Terrariums

The best types of moss for terrariums will be terrain-based plants that like high humidity. Here are the more popular types of mosses commonly found in home cultivation:

Best Moss For Terrariums

Best Types Of Moss for Aquariums

Planting moss in an aquarium can be a bit tricky. Since genuine moss won’t do well very submerged in water, one will have to resort to plants close to the moss family. Here is a list of plants that aren’t part of the “Bryophyta” moss family but will still give an aesthetically pleasing look to a moss aquarium:

Best Moss For Aquariums
  • Java Moss (Taxiphyllum Barbieri) – Arguably one of the most common aquarium moss in the hobby today… This moss is easy to care for and does a great job attaching to wood or stone surfaces.
  • Phoenix Moss (Fissidens Fontanus) – Closely resembles the traditional moss we see above land. This clumpy, pillow-like moss does well completely submerged as well as partially immersed.
  • Christmas Moss (Vesicularia Montagnei) – Does really well in corners and round stones. This moss can be a bit more demanding than others and will require more light and pruning.
  • Liverwort (Monosolenium Tenerum) – Known as Pellia in the past, this plant is very close to the moss family. Being heavier than water, liverwort makes a good carpeting plant to have at the lower end of the mossarium.
  • Crystalwort (Riccia Fluitans) – This is a floating plant that takes a bit of effort to maintain if you’re planning on tying it down to a hardscape. Crystalwort will add a very unique look to any well-lit mossarium with its sparkling look.

Where To Find Moss

Finding moss will depend greatly on your geographical location. If you live in an area where moss potentially grows, you can easily find it in shaded areas like woods or backyards. I’ve been very fortunate, living here in south Florida, to find moss growing in my backyard and along walls.

There are also places available online that sell various moss types and can easily be shipped to you since moss is a relatively hardy plant. If you are buying moss with the intent to grow it, be sure to avoid artificial moss or preserved moss as it will not be real and may have artificial coloring added to it which will wash out if put around water.

For a complete list of available mosses great for mossariums and other types of vivariums check out this guide or click on the image below:

Best Mossarium Starter Kits

If you’re still unsure about how to really start a mossarium, I took a moment to gather an essential list of materials that would help construct the ideal moss terrarium. This kit is a hardscape-based setup, meaning the moss will be glued directly to the stone and there won’t be a need for a drainage layer.

Mossarium Glass Jars

These Bantamarium Jars come in an array of sizes and will be ideal for the mossarium you will build within this case. This case has a strong, sturdy base and won’t hold more than a couple of ounces of water at a time. Feel free to shop around for different styles if you prefer something aesthetically different.

Hardscape Stone Kit

Hardscapes come in different sizes and will be the perfect material for moss to be glued directly to. Personalize the look of your mossarium by stacking and gluing the stones together before applying moss.

Various Moss Kits

Various mosses are great for those looking to have some extra moss for additional projects in the future. This kit comes with an assortment of different moss species which is great because you can experiment with the look and feel of your mossarium.

Vivariums Similar To A Mossarium

The many other types of vivariums you will see out there are more than likely based on one of these core designs. If you are building a vivarium with the intention of housing a specific type of plant or animal, be sure to go with a design that closely fits their needs.

If you enjoyed this type of content, be sure to check out some of the other popular types of enclosures we’ve covered in the past:

Terrariums Complete Guide


Bantamarium: Everything You Need To Know
Paludarium Complete Guide


A mossarium can be a fun twist on the typical terrarium project. Building a terrarium based on a specific species of plant is something that’s becoming more popular as the terrarium hobby evolves. If you really enjoyed our deep dive into moss terraria and would like to see another type of terrarium covered in a later post, be sure to let us know below!

Frequently Asked Questions

A Mossarium is a type of terrarium made out of a glass container such as a jar or vase and filled with a layer of pebbles on the bottom followed by soil, activated charcoal, and living plants like moss or other small, lowgrowing plants. The term Mossarium is derived from the combination of moss and terrarium.

No, moss terrariums do not need soil as a foundation. Just any foundation that would be welldraining, as moss prefers moist environments. Planting substrate with a neutral pH is recommended. 

Mossariums need a few basic items to get started:

  • A container, like a fish tank or terrarium, is large enough to hold the plants.
  • Gravel or stones for drainage.
  • Sphagnum moss or peat moss for moisture retention.
  • A potting mix to provide nourishment.
  • A variety of living mosses.
  • Terrarium decorations or markers to create an interesting design.

Moss can last many years in a terrarium if proper moisture and lighting levels are maintained.

Water your moss terrarium every two weeks. Use a spray bottle to ensure that the water is evenly distributed across the moss. Avoid standing water, as this may cause the moss to rot.

Yes, moss terrariums need sunlight. A moss terrarium will thrive in indirect sunlight and should be placed near a window. But keep in mind that too much direct sunlight can cause the moss to dry out. Artificial lighting works just as well.

Yes, it is possible to over-water a moss terrarium. You should be careful not to keep the terrarium too wet as it can lead to mold, disease, and rotting roots. To avoid overwatering, make sure to use a soil mix with good drainage and irrigate the moss only when the soil is dry. Additionally, the frequency and amount of water should be adjusted depending on the climate and season.

Yes! Charcoal is an essential part of any moss terrarium. Charcoal helps regulate the pH levels in the terrarium and removes toxins while also absorbing and filtering odor molecules. Adding charcoal to the terrarium keeps the water and soil clean, making it essential for a healthy and vibrant moss terrarium.

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