Terrarium FAQ – Terrarium Creations
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Terrarium FAQ

Everything you need to know about building, planting, and caring for terrariums — answered.

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Terrarium Building

What supplies do I need to build a terrarium?
To build a terrarium you'll need a container, potting soil, gravel, activated charcoal, and plants. Depending on size and plant types, you may also want stones, moss, and decorative accents. See our full Terrarium Building Essentials guide for a complete supply list.
What type of container should I use for my terrarium?
Glass or clear plastic works best — both are breathable and let you see the whole ecosystem. Match container size to your plants, and ensure there are drainage holes or add a gravel drainage layer. More guidance in our Building Essentials page.
What kind of soil should I use for my terrarium?
Use a potting mix formulated specifically for terrariums — it retains the right moisture without becoming waterlogged. Avoid standard garden soil. See our Building Essentials page for recommendations.
What is activated charcoal used for in terrariums?
Activated charcoal keeps your terrarium fresh and odour-free. It absorbs excess moisture, filters toxins from the soil, and prevents mould — especially important in closed builds. Read our full activated charcoal guide and our Building Essentials page for layering tips.
Does a terrarium need to be enclosed?
No — open terrariums suit succulents and cacti, while closed builds suit moisture-loving tropicals. If humidity gets too high, crack the lid to ventilate. Read more about open vs closed terrariums →
What tools are useful for terrarium building and care?
A spray bottle is essential for watering. Long tweezers let you position plants and stones with precision. Small scissors or pruning snips keep foliage tidy. A soft brush clears debris from the glass walls. Full list in our Terrarium Building Essentials guide.
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Terrarium Plants

How do I choose the right plants for my terrarium?
Match plants that share similar needs for light, water, humidity, and soil type. Consider container size and whether you're building open or closed. Browse individual plant profiles in our Terrarium Plant Library, and read our guide on how to pick the best terrarium plants.
What are some popular terrarium plants?
Popular choices include ferns, mosses, air plants, begonias, orchids, and ivy for tropical builds. Succulents are great for open, low-maintenance terrariums. For deeper inspiration, see our 7 Most Popular Types of Terrarium Plants, our Best Plants for Closed Terrariums, and the full Plant Library.
What are some plants to avoid in terrariums?
Avoid invasive fast-growers like mint and bamboo — they'll quickly take over. Lavender and hydrangeas don't suit terrarium conditions. Many cacti and succulents need far drier conditions than a closed terrarium provides. Always check any local restrictions on certain plant species. Use our Plant Library and plant selection guide to find confirmed terrarium-suitable varieties.
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Terrarium Care

What is the best way to water a terrarium?
A spray bottle is ideal — it distributes moisture evenly and gives you precise control. Check the soil regularly and mist lightly when it looks dry. Always err on the side of underwatering. More tips in our Terrarium Care Guide and Top 5 Care Tips.
How often should I care for my terrarium?
Check moisture and remove dead foliage at least once a week. Fertilise occasionally depending on plant types. Closed terrariums are largely self-sustaining once balanced. Visit our Terrarium Care Guide and Top 5 Essential Terrarium Care Tips for a complete routine.
How can I prevent bugs and pests in my terrarium?
Always start with pest-free plants and inspect them thoroughly before planting. Avoid introducing outdoor objects that may carry pests or disease. Good airflow and avoiding overwatering also deter gnats and mould. More in our Terrarium Care Guide.
What is the best way to clean my terrarium?
Use a damp lint-free cloth with a small amount of mild, non-toxic dish soap on the glass. Never use harsh chemicals — they harm plants and disrupt the ecosystem. More detail in our Terrarium Care Guide and Essential Care Tips.
What should I avoid doing to my terrarium?
Don't overcrowd with too many plants — it stresses the ecosystem and restricts airflow. Never use pesticides or harsh chemicals inside the terrarium. Avoid both overwatering and underwatering; both cause serious damage. See our Terrarium Care Guide and Top 5 Care Tips for what to do — and what not to.
How can I stop my terrarium from fogging up?
Persistent fogging means excess moisture. Open the lid for a few hours daily to let humidity escape. A small fan directed at the terrarium helps too. Some condensation is normal — only act if it doesn't clear after a few hours. More tips in our Terrarium Care Guide.
What are some tips for maintaining my terrarium long-term?
Provide consistent lighting, good ventilation, and stable temperature. Use the right soil mix with adequate nutrients, and don't over- or underwater. Prune dead or dying leaves regularly to keep the environment healthy. Read our Terrarium Care Guide, Top 5 Essential Care Tips, and Terrarium Placement: The Dos and Don'ts for a complete maintenance picture.
What are signs that my terrarium needs special care?
Watch for wilting, yellowing or dropping leaves, mould growth, unpleasant odours, or visible pests. Any of these signals that light, water, or airflow needs adjusting. Visit our Terrarium Care Guide and Top 5 Care Tips for troubleshooting.
How do I care for moss in my terrarium?
Moss thrives with consistent humidity, indirect light, and occasional misting. Avoid letting it dry out completely or sit in standing water. For a full guide covering watering, light, humidity, and propagation, read Caring for Moss in Terrariums.
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Terrarium Design

What are some terrarium design themes and ideas?
Popular themes include desert (cacti & succulents), tropical jungle, fairy garden (tiny figurines and miniature houses), and underwater-inspired scenes with coral decor. Get inspired by our Terrarium Design Ideas page and our 10 Terrarium Design Principles.
How can I decorate my terrarium and what should I use?
Stones, shells, driftwood, miniature figurines, and coloured sand all work well. Make sure everything is safe for the terrarium environment — avoid painted items that may leach chemicals. Our 10 Design Principles guide covers what to use and how to arrange it. More on our Terrarium Design Ideas page.
What else can I do to enhance the look of my terrarium?
Coloured substrate layers, sheet moss, and decorative stones add depth. Spotlights or coloured LEDs can completely transform the atmosphere. Check the 10 Design Principles for pro styling tips, and browse Terrarium Design Ideas for inspiration.
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Terrarium Lighting

What lighting can I use for my terrarium?
Full-spectrum LED grow lights are the best all-round choice for plant health. Coloured spotlights add visual drama and atmosphere. Match spectrum and intensity to the plants inside. See our Terrarium Placement guide for how positioning affects light quality.
Are LEDs the best option for terrarium lighting?
Yes — LEDs offer full-spectrum output, run cool (critical in an enclosed space), are energy-efficient, and last up to 10× longer than fluorescent alternatives. They're the clear winner for terrarium lighting. See our Terrarium Care Guide for how to optimise your full setup.
How much light is enough for my terrarium plants?
Tropical terrariums generally need 8–12 hours of light per day. Plants in bright spots may need less artificial supplementation; those in dim positions need more. Always match duration to your specific plants — individual light requirements are listed in our Plant Library. Our Terrarium Placement guide helps you find the right spot.
Can I place my terrarium in direct sunlight?
Avoid direct sunlight — the glass magnifies heat and can scorch plants and rapidly dry out substrate. Place near a bright window for indirect light, or use artificial grow lights instead. Read Terrarium Placement: The Dos and Don'ts for full guidance.

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Terrarium Building

To build a terrarium, you will need an appropriate-sized container, potting soil, gravel, activated charcoal, and plants. Depending on the size of your terrarium and the type of plants you are using, you may also need stones, moss, and/or decorative items. Check out our Terrarium Building Essentials page. 

When choosing a container for your terrarium, there are a few things to consider. First, make sure the size is appropriate for the type of plants you plan to use. Second, the container should be made of a material that is breathable, such as glass or plastic. Lastly, make sure there are drainage holes in the bottom for water to escape. For more info, check out our Terrarium Building Essentials page. 

For terrariums it’s best to use a potting soil that is specially formulated for terrariums. This type of soil will allow the plants to get the nutrients they need and retain enough moisture, but not become overly soggy. For more info, check out our Terrarium Building Essentials page. 

Activated charcoal is important because it helps keep your terrarium clean and free of odors. It also helps control the moisture levels in terrariums, absorbing excess water and preventing mold growth. For more info, check out our Terrarium Building Essentials page. 

No, a terrarium does not need to be completely closed off. However, when moisture is too high, it is important to make sure the lid or top of the container provides enough ventilation so that your plants and other elements inside can receive the necessary air exchange. This will help keep your terrarium healthy and prevent mold from growing. Read more here >

When building and caring for a terrarium, there are several tools that come in handy. A spray bottle is great for evenly distributing water to your plants, while tweezers make it easy to move and reposition small rocks or figurines. A pair of scissors can be used to prune any dead foliage and keep plants looking tidy. Finally, a small brush can be used to dust off any dirt or debris from the walls of your terrarium. These tools will help you keep your terrarium clean, tidy, and looking its best. Read more about essential terrarium supplies here >

Terrarium Plants

When selecting plants for your terrarium, it’s important to select ones that are compatible with each other. Consider the size of your terrarium and the type of environment you’re creating. Most importantly, make sure to choose plants that require similar levels of light, water, humidity, and soil type.

Check out our Terrarium Plant Library for some inspiration!

Popular terrarium plants include tropical varieties such as ferns, air plants, and mosses. Succulents are also popular because they require very little maintenance. Other common plants for terrariums include begonias, orchids, and ivy.

Check out our Terrarium Plant Library for some inspiration!

Some plants are not suited for terrariums because they can outgrow their environment or require too much light and water. For example, it’s best to avoid lavender, and hydrangeas. Additionally, it’s important to avoid invasive species like mint, as they can quickly take over the terrarium. It is best to avoid any type of plant with a very aggressive root system, such as mint or bamboo, as these plants can quickly overtake the entire terrarium. Similarly, some types of cacti or succulents require a much dryer environment than what is provided in a terrarium and therefore should be avoided. Additionally, it’s important to check for any type of local ordinances that may prohibit certain types of plants. Overall, when selecting plants for your terrarium it’s best to do thorough research and pick varieties that fit its specific requirements.

Check out our Terrarium Plant Library for info on plants that are suited to terrarium conditions. 

Terrarium Care

The best way to water your terrarium is with a spray bottle. This will help you evenly distribute the moisture and prevent accidentally over- or under-watering your plants. Be sure to check the soil regularly, and if it appears too dry, give it another light misting of water.

For more tips on terrarium care, visit our Terrarium Care Guide page.

You will need to check on your terrarium regularly to make sure everything is healthy and thriving. This includes checking the soil moisture, removing any dead foliage, and keeping things clean. Depending on the type of plants you have, it’s a good idea to fertilize your terrarium every once in a while. 

For more tips on terrarium care, visit our Terrarium Care Guide page. 

The best way to prevent pests in your terrarium is to only use pest-free plants – check before you plant! Also, avoid introducing any foreign objects that may have been exposed to pests or diseases.

For more tips on terrarium care, visit our Terrarium Care Guide page. 

The best way to clean your terrarium is with a damp lint-free cloth and mild non-toxic dish soap. Be sure not to use any harsh chemicals or cleaners, as this can be damaging for both the plants and the environment inside your terrarium. 

For more tips on terrarium care, visit our Terrarium Care Guide page. 

There are several things you should avoid doing to your terrarium. First, don’t overcrowd your terrarium with too many plants as this can cause it to become unhealthy. Second, avoid using any pesticides or other harsh chemicals inside the terrarium. Finally, be sure not to over- or underwater your plants, as this can cause serious damage.

For more tips on terrarium care, visit our Terrarium Care Guide page. 

If your terrarium is fogging up, this likely means there is too much moisture inside. The best way to stop the fogging is to open the lid or container of the terrarium for a few hours each day to allow some of the moisture to escape. You can also use an electric fan pointed towards the terrarium to help reduce condensation. Finally, make sure your terrarium is receiving adequate airflow to prevent the buildup of moisture. By following these steps, you can easily keep your terrarium from fogging up.

For more tips on terrarium care, visit our Terrarium Care Guide page. 

To maintain a healthy terrarium, it is important to provide proper lighting, ventilation, and temperature for the plants inside. It’s also essential to make sure you are not over or under watering your plants. Additionally, it is important to have the right soil mixture with enough nutrients for growth but not so much that the plants outgrow the terrarium. Make sure you prune any dead or dying leaves to keep your terrarium looking healthy and vibrant. By following these tips, your terrarium will stay in great condition for many years to come! 

For more tips on terrarium care, visit our Terrarium Care Guide page. 

If you notice that your plants are wilting, discoloring, or losing leaves, this could be a sign that they are not getting enough light or water. Another indicator of problems in the terrarium is mold growth or an unpleasant odor. Finally, if bugs start to appear in your terrarium, then you may need to take action to get rid of them. If you notice any of these signs, take the necessary steps to ensure that your terrarium remains healthy and thriving.

For more tips on terrarium care, visit our Terrarium Care Guide page. 

Terrarium Design

Terrariums can be designed in any style or theme you choose. You could create a desert terrarium with cacti and succulents, or a tropical oasis filled with lush foliage. If you’re looking for something more creative, you could even make a fairy garden full of tiny houses and miniature furniture. Another popular design idea is to make a terrarium that looks like an underwater scene, complete with coral and sea creatures. The possibilities are endless – let your imagination run wild when designing your perfect terrarium! With the right supplies and some creative ideas, you can easily create a beautiful living space for your plants.

Read more about terrarium design on our Terrarium Design Ideas page. 

There are many ways to enhance the look of your terrarium, such as adding decorative items like stones or small figurines. You can also add moss or special soils to give it a unique texture and color. Finally, you can use lighting to create a unique atmosphere inside your terrarium. Spotlights and colored lights are great options to create a stunning display. 

Read more about terrarium design on our Terrarium Design Ideas page. 

There are many decorative items that can be used to enhance the look of your terrarium. Stones, shells, driftwood, figurines and other miniature ornaments are all great options for adding a personal touch to your creation. Just make sure whatever you choose is safe for the environment inside your terrarium. 

Read more about terrarium design on our Terrarium Design Ideas page. 

Terrarium Lighting

Depending on the type of terrarium you have, different lighting sources will be more effective. For instance, a tropical terrarium should use LED lights that are designed for plants and provide full spectrum illumination. You can also use colored spotlights or other decorative lighting to create a unique atmosphere inside your terrarium. Whichever lighting source you choose, make sure it’s providing enough light for all the plants in your terrarium. With the right lighting, your terrarium will look amazing!

LEDs are an excellent option for terrarium lighting because they provide full spectrum illumination, which is essential for healthy plant growth. LEDs also produce less heat than other lighting sources and can last up to 10 times longer. They are also very energy efficient and cost-effective in the long run. For these reasons, LED lights are a great choice for your terrarium lighting needs.

The amount of light needed for your terrarium plants will depend on the type of plant you have. Generally speaking, tropical terrariums should receive 8-12 hours of light per day. Of course, every situation is different and you may need to adjust the lighting accordingly. Terrarium placement is also a factor, as plants that are placed in a bright location may need less light than those in a dim spot. With the right lighting, your terrarium plants will thrive!

Placing your terrarium in direct sunlight can be damaging to the plants and other living organisms inside. Instead, you should place your terrarium near a bright window or use artificial lighting. This will give your plants the light they need without overexposing them to harsh sunlight.

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