Do you need charcoal for a terrarium
Ava White
Updated on March 24, 2026
Charcoal is an important element in a terrarium because it helps remove toxins and odors. If you don’t have charcoal, you can still make a terrarium, but you’ll need to to take extra steps to ensure your plants remain healthy and that the environment inside your terrarium remains clean and odor-free.
What can I use instead of activated charcoal?
Use of burned toast as a substitute for activated charcoal in the “universal antidote”
What do you need in a terrarium?
- A glass or plastic container.
- Rocks, if you choose.
- Moss, if you choose.
- Soil (growing medium)
- Plants that won’t overgrow (generally miniature or dwarf plants)
- Spoon for placing soil.
- Long tweezers for putting materials into vessel.
What kind of charcoal is needed for a terrarium?
If plant roots sit in water, they won’t get enough oxygen and the plants will die. Put a light layer of activated charcoal chips over the pebbles. Stores that carry pet and fish supplies are a good source for this kind of charcoal. It will help absorb odors that can build up over time, especially in closed terrariums.Do you need dirt in a terrarium?
“For air plants, don’t use any soil at all, they prefer to stay dry and exposed to as much air as possible so simply placing them on a bed of rocks or driftwood is ideal. For small ferns and tropical plants, a moist potting soil will do just fine.”
Do succulents need activated charcoal?
Is Horticultural and Activated Charcoal Good for Succulents? Activated Charcoal helps in removing bad smell and toxins from the soil. These charcoals are highly porous in nature so they help in better drainage. So yes activated charcoal or horticultural charcoals are one of the best soil components you can use.
Can I use BBQ charcoal for terrarium?
To start, activated charcoal is especially good to use for plants that are growing in terrariums. Activated charcoal for succulents would work as well. It’s also great for plants that are growing in cachepots and other closed-in planting mechanisms, and it’s ideal for helping to absorb extra water in plants.
Where do I put the charcoal in my terrarium?
Unlike in general gardening, charcoal is not often used as a soil additive in terrariums. Instead, almost everyone online seems to recommend a complete layer of charcoal near the bottom.Can I use normal charcoal for plants?
Can charcoal replace soil for plants? Yes, you can use charcoal as the growing medium for plants. It helps plants by increasing water absorption and promoting beneficial bacteria and fungi.
Does activated carbon work in terrariums?Activated Charcoal in a Terrarium A 1/2-inch layer of activated charcoal under the soil and between an upper layer of sphagnum moss and a lower layer of gravel or pebbles, acts as a filter that pulls toxins and bacteria from the soil and water and deodorizes the terrarium.
Article first time published onWhy do you need a charcoal layer in a terrarium?
And one of these concerns a soil additive called activated charcoal. You’ll read that adding activated charcoal (charcoal that has been heated to increase its adsorptive power) to the soil in a terrarium is supposed to help keep the soil fresh, to remove toxins from the soil, even control bacteria and fungus.
What can you put in a terrarium Besides plants?
- Crystals, minerals, and gemstones.
- Resin.
- Shells.
- Logs or twigs.
- Preserved flowers.
- Rocks.
- Figurines.
- Salt.
Should terrariums be open or closed?
Open – These terrariums are great for direct light or lots of sun. … Closed – These terrariums require very little maintenance. Indirect light is great for these plants. Direct sunlight on a closed terrarium can burn your plants.
How do you make a closed terrarium without charcoal?
If you don’t have charcoal, you’ll need to add an extra 1 inch of gravel at the bottom of your container. A layer of sphagnum moss on top of the gravel helps keep the soil from mixing into the gravel.
Can I use potting mix for terrarium?
Potting Soil – The easiest, cheapest soil for your terrarium is regular houseplant potting soil. This is a common choice due to its availability and cost and works well for tropical plants.
Can you put potting soil in a terrarium?
Not Recommended (Or At Least Not Ideal) Terrarium Soils The real weakness in potting soil is its poor drainage and tendency to compact too much. We all know what happens to wet soil, it just turns to a thick mud… Not ideal growing conditions for any plant, and many tropical terrarium plants simply won’t tolerate it.
Why do you need Moss in a terrarium?
Mosses have rhizoids, root hairs which help these plants secure their shapes. Mosses absorb water into their bodies. … They are also good for terrariums – they are easy to plant and need less planting space. Once planted in your terrarium, mosses are low maintenance.
Do you need sphagnum moss in a terrarium?
Sphagnum Moss is true terrarium staple. It has huge utility thanks to its incredible water retention capabilities – making it just as effective a substrate as a carpeting moss. Not all that surprising considering its natural role of forming peats bogs in the wild through storing water.
How much charcoal do you put in potting mix?
The general rule is that you mix two cups of horticultural charcoal for every cubic foot of potting soil. In simpler terms, use one part of charcoal for every 10 parts of soil.
How do you charcoal a potted plant?
For potted plants, you can create a layer of horticultural charcoal near the bottom of the pot, under the soil, to help absorb water, hold nutrients, repel insects and more. A 1/2-inch-thick layer of activated charcoal in a 4-inch pot, for example, should work. You can also mix charcoal for plants into potting mix.
What does charcoal do to soil?
Charcoal increases the soil’s ability to hold onto plant nutrients and beneficial soil microbes by slowing or reducing the leaching of nutrients by rain or watering. The low density of charcoal lightens heavy soils, which allows better root growth, increasing drainage and allowing air into the soil.
How do you make charcoal plants?
Making Biochar Charcoal in a Garden. You can make biochar at home on a micro scale by digging a trench or hole and putting a mixture of dry wood and dried plant materials such as sweetcorn stalks or perennial weeds and roots into it. Set fire to the material which will initially give off clouds of white smoke.
What do I need for a succulent terrarium?
- A hanging terrarium.
- An assortment of mini succulents.
- A hand trowel.
- Gravel.
- Gardening gloves.
- Compost suitable for cacti and succulents.
- Seasonal decorations of your choice.
- Moss.
Can I buy activated charcoal?
Activated charcoal is available in pill and powder form at many online retailers, including Google Express and Amazon, and at supplement stores such as GNC. As with any supplement, follow the dosage and instructions on the label, and only buy from reputable brands that are third-party tested.
How do you activate charcoal?
The charcoal is “activated” when it’s heated to a very high temperature. This changes its structure. Heating gives the fine carbon powder a larger surface area, which makes it more porous.
What is the difference between activated carbon and activated charcoal?
The primary difference between a water filter that uses activated carbon and one that uses charcoal is in the filtering materials themselves. Both are hard, porous substances that capture contaminants. … As a rule, activated carbon is purer and of a better quality than activated charcoal.
Can I use wood charcoal in my terrarium?
If it’s an open terrarium, you could use the plain, lump style hardwood charcoal but never briquettes, which usually have fuel added to them. So long as its just burned wood without a fuel additive, it would be ok provided it won’t be used in a sealed terrarium. You really need activated charcoal for the sealed ones.
How do you make a beginner terrarium?
- Step 1: Prepare Your Container. …
- Step 2: Add The Rocks And Pebbles. …
- Step 3: Place The Activated Charcoal Inside The Container. …
- Step 4: Add The Soil. …
- Step 5: Do Some Planting! …
- Step 6: Accessorize Your Terrarium. …
- Step 7: Find A Place For Your Terrarium. …
- Step 8: Maintain Your Terrarium.
Can you put shells in a terrarium?
#3: Shells Other great shells for terrariums are nautilus, conch, red abalone shell, fig shells, limpet shells, sand dollars and more. … Once again, to make it the main accent of the terrarium, pick one larger shell. To add to the theme, you can pick few smaller pieces and add them to different sides of the terrarium.
How do you make a successful terrarium?
- Choose a Container. Choosing your container and plants is half the fun of making a terrarium. …
- Choose the Plants. …
- Add Drainage Layers. …
- Add Moss and Potting Mix. …
- Prepare the Plants. …
- Add Plants. …
- Decorate. …
- Water the Terrarium.
Can moss grow in terrariums?
Moss and terrariums go together perfectly. Requiring little soil, low light, and dampness rather than lots of water, moss is an ideal ingredient in terrarium making.